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Showing 22 results for Seed Yield

Esmaeil Gholinezhad,
Volume 1, Issue 1 (9-2014)
Abstract

In order to investigate the effects of water deficit stress effects, different rates of nitrogen and plant density on remobilization, current photosynthesis and grain yield in oily sunflower var. Iroflor, an experiment was carried out in field Agriculture and Research center of West-Azerbaijan during 2011 and 2012 cropping seasons. The experimental was conducted as split-split-plot base on Randomized Complete Block Design (RCB) with 3 replications. The main factor was consisted irrigation treatment including optimum irrigation, moderate stress and sever stress which irrigation was done after depletion of 50%, 70% and 90% of available water, respectively. Three nitrogen levels of 100, 160 and 220 kg N haG1 were considered as sub plots and sub-sub plots consisted of three plant populations of 5.55, 6.66 and 8.33 plants m2. The results of combined analyzes showed that severe drought stress reduced the grain yield by 60% compared to the optimum irrigation condition. Comparison of two-year-mean revealed that severe drought stress in compared with optimum irrigation dry matter remobilization rate decreased about 30 percent. Also, severe drought stress led to 35% reduction of current photosynthesis efficiency in compared with optimum irrigation. In each level of nitrogen fertilizer, increasing plant population led to increase contribution of remobilization but current photosynthesis contribution decreased. Therefore, due to reduction of current photosynthesis rate in severe drought stress condition, contribution of current photosynthesis decreased so that increasing of (contribution of, deleted) remobilization contribution prevented reduction of seed yield.
Mehdi Ghaffari,
Volume 1, Issue 1 (9-2014)
Abstract

Impact of three water deficit treatments in vegetative, flowering and grain filling stages along with optimum irrigation as control were evaluated on grain yield and agronomic characteristics of 8 sunflower cultivars (Hysun 33, Hysun 25, Farrokh, Record, Aravirski, Lakumka, Master and SHF 81-90) as a strip plot design with three replications in Khoy Agricultural and Natural Resources Research Station. Different water regimes had significant effect on growth period, plant height, stem and head diameter, seed yield and its component. Stem diameter, plant height and seed number per head were affected considerably by drought stress in vegetative stage, while head diameter by drought stress in flowering stage and growth period and seed weight by water deficit in seed filling stage. Water deficit in flowering and vegetative stages had the highest (38%) and lowest (25%) negative effect on grain yield, respectively, so flowering stage and vegetative stage established as the most sensitive and tolerant stages to water deficit, respectively. Farrokh hybrid with highest seed yield in different irrigation treatments (3686, 2856, 2256 and 2506 Kg/ha in control and water deficit in vegetative, flowering and grain filling stages, respectively) revealed as the most drought tolerant cultivator while Hysun33 lowest seed yield showed maximum drought sensitive.
Hamid Jabbari, Gh. Abbas Akbari, Nayer Azam Khosh Kholgh Sima, Iraj Alahdadi, Amir Hossein Shirani Rad, Seyed Ali Tabatabaee, Ali Hamed,
Volume 1, Issue 1 (9-2014)
Abstract

In order to comparison of antioxidant enzymes and proline roles in drought tolerance of rapeseed, an experiment was conducted at the research field of Yazd Agricultural and Natural Resources Research Center in 2011-2012. In this study, three commercial rapeseed genotypes (GKH2005, Opera and Okapi) were examined for response to irrigation treatments such as non-stress conditions (control) and withholding irrigation from stem elongation, flowering and silique formation stages in four separate experiments based on randomized complete block (RCB) design. The results indicated that proline accumulation, activity of catalase and proxidase enzyme and lipid peroxidation index (content of malondealdehyde) were higher in drought stress treatments, but these amounts were different in three rapeseed genotypes. Maximum activity of antioxidant enzymes and low content of malondealdehyde was observed in GKH2005 compared with others, in drought stress conditions. Between these genotypes, GKH2005 produced the highest seed yield under non-stress conditions and withholding irrigation from stem elongation, flowering and silique formation stages as 3110, 1450, 1773 and 2510 kg.ha-1, respectively. These results showed that role of antioxidant enzymes on reduction of lipid peroxidation and increasing the drought tolerance is more than proline. Also, an effective antioxidant system along with lower malondealdehyde and high silique number per secondary branch had the greatest role to productivity maintenance of Rapeseed under drought stress conditions
Valiollah Rameeh,
Volume 1, Issue 1 (9-2014)
Abstract

In order to the evaluate the effect of planting dates on phenological traits, plant height, pods per plant and seed yield of rapeseed spring varieties, a split-split plot experiment based on randomized complete block design with four replications was conducted during 2 years at Agriculture Research Station of Baykola, Mazandaran, Iran. Treatments were planting dates (September 29, October 9, October 19, October 29 and November 8) as main plot and sub-plots were three cultivars ( Hyola401, Option500 and RGS003. All the traits were affected by planting date and variety. The mean values of seed yield of Hyola401, Option500 and RGS003 were 3274, 2898 and 3040 kg ha-1, respectively and Option500 and RGS003 had not statistically significant difference. Non significant interaction effects of planting dates and varieties for seed yield indicated that yield reduction of the varieties in late planting dates had similar trend and Hyola401 and Option500 had the most and the least seed yield, respectively. Seed yield reduction at late planting date was related to insufficient vegetative growth before flowering stage. Significant positive correlation between plant height and number of pods per plant was the main reason that in late planting date reduction of plant height imposed reduction of pods per plant and finally seed yield was decreased.
Abolfazl Faraji,
Volume 1, Issue 2 (3-2015)
Abstract

Optimum leaf area index (LAI) is necessary to decrease in soil surface evaporation, to intercept maximum radiation and to increase in dry matter production and seed yield. In order to study the development of leaf area in canola (B. napus) and its relationship with seed yield, this experiment was conducted at agricultural research station of Gonbad during 2005-7. The experiment was a RCBD arranged in a split-plot in two conditions, i.e. supplemental irrigation and rain-fed. Five sowing dates (SD) (Nov. 6, Dec. 6, Jan. 4, Feb. 5 and Mar. 5) assigned as main plots and two cultivars (Hyola 401 and RGS003) as subplots. In all treatments, the number of leaves on main stem and LAI increased till the beginning of seed filling, and then decreased considerably due to sever shedding of leaves. LAI at the beginning of seed filling stage, varied from 6.1 in Nov. 6 to 3.1 at Mar. 5 SDs in supplemental irrigation conditions, and from 5.2 on Nov. 6 to 2.4 at Mar. 5 SDs in rain-fed conditions. The better early growth of Hyola401 compared to RGS003 cultivar caused that, in each year and conditions, LAI of Hyola401 was significantly more than RGS003 at the beginning of stem elongation and budding. The strong relationships between the number of leaves on main stem and LAI at different growth stages and seed yield, showed the positive effects of these traits on seed yield.
Madine Bijani, Parviz Yadollahi, Mohammad R. Asgharipour, Saeide Soleimani, Malihe Latifi,
Volume 1, Issue 2 (3-2015)
Abstract

Sesame is an important and useful oil crop. This study was conducted to evaluate of the effects of nitrogen and biological fertilizer on sesame crop as a factorial experiment based on a randomized complete block design with three replications in the research farm of the university of Zabol. Experimental factors were nitrogen (N) fertilizer at four levels (0, 160, 240 and 320 kg ha-1 N as urea) and nitroxin at two levels (inoculated and non-inoculated). Nitroxin application significantly increased plant height, number of lateral branches, 1000-seed weight, number of seeds per capsule, number of capsules per plant, seed yield, oil yield, and protein content. When 240 kg ha-1 of urea was applied, number of lateral branches, 1000-seed weight, number of seeds per capsule, number of capsules per plant, and protein content increased by 50, 12, 18, 45 and 11%, respectively. The interaction of treatments revealed that inoculation of seeds with nitroxin along with 75% recommended N application increases plant height, seed and oil yield, respectively, by 28, 58 and 56% compared with non-inoculated seed and non N fertilizer application. generalley the results indicated that besides improving of growth condition, seed inoculation with nitroxin can be usefull in reduction of the application of chemical nitrogen fertilizers.
Azadeh Khoram Ghahfarokhi, Asghar Rahimi, Benyamin Torabi, Shahab Maddah Hosseini,
Volume 2, Issue 1 (9-2015)
Abstract

Humic acid as an organic acid produced by humus and other natural resources can improve nutrients absorption and seed yield. In order to study the effect of granular humic acid and foliar application of compost tea and vermiwash on nutrient absorption, chlorophyll content and seed yield of safflower (Carthamus tinctorius L.), an experiment was conducted as a factorial experiment based on randomized complete block design with three replications in agricultural research farm at Vali-e-Asr University of Rafsanjan. Treatments included of soil application of humic acid (0, 500, 1000 and 1500 kg ha-1) and foliar spraying of vermiwash 1:10, vermiwash 1:20, compost tea and distilled water as control. Results indicated that humic acid application had significant effect on the zinc, nitrogen and phosphorus content of shoot, chlorophyll index and seed yield. On the other hand, compost tea foliar application significantly influenced zinc and copper content of shoot, chlorophyll content and seed yield of safflower. It seems humic acid application (1500 kg.ha-1) in soil along with compost tea foliar application was the best treatment for producing of seed yield and higher nutrition absorption, chlorophyll content in safflower.


Valiollah Rameeh, Mohammad Bagher Salimi,
Volume 2, Issue 1 (9-2015)
Abstract

In order to evaluate the effect of different nitrogen fertilizer levels on physiological traits, plant height, yield components, and seed yield of rapeseed genotypes a split-plot experiment based on a randomized complete block design with three replications was carried out at the Baykola Agriculture Research Station, Mazaandaran during 2010-11. Four levels of nitrogen, as urea fertilizer, including of 0, 70, 140 and 210 kg ha-1 were considered as main plots and four rapeseed genotypes including of L7, Zafar, RGS003 and Hyola401 were considered as subplots. The result of analysis of variance revealed that the traits, including number of days to flowering, number of days to end of flowering, number of days to maturity, plant height, siliques pods per plant, seeds per silique, seed yield and oil yield were significantly affected by nitrogen levels. Genotype effect was significant effect on all the traits except seeds per silique. Hyloa401 and Zafar respectively with 3831.2 and 3893.7 kg ha-1 of seed yield, and also 1638 and 1591 kg ha-1 of oil yield were classified at the same statistical group. Non significant interaction effects of nitrogen fertilizer application and genotypes were achieved for all of the studied traits, indicated that the trend of variation of these traits due to nitrogen levels were similar in all genotypes. A significant positive correlation of seed yield with the other studied the traits, except days to flowering, indicated that increasing of nitrogen level application made increasing of the traits and finally seed yield.


Marefat Mostafavi Rad, Esmaeil Jadidi, Taghi Babaei, Mohammad Hossein Ansari,
Volume 2, Issue 1 (9-2015)
Abstract

Deficiency of soil nutrient elements is one of the most important restricting factors of crop production. Hence, management of nutrition is necessary for optimizing of plant growth, yield increment and sustainability of crop production. In order to evaluate growth stages and some quantitative indices in winter rapeseed (Brassica napus L.) cultivars as affected by micronutrient fertilizers, a field experiment was performed in 2010-2011 cropping seasons as a split plot arranged in randomized complete block design with three replications in Arak, Iran. Eight micronutrient fertilizers (Zero as control, Fe, Zn, Mn, Fe + Zn, Fe + Mn, Zn + Mn, Fe + Zn + Mn) and four rapeseed cultivars (Zarfam, Okapi, Modena and Licord) were randomized in main plots and subplots, respectively. The result showed that, Okapi cultivar had the highest grain yield under no fertilization treatment (4194 kg/ha) and Zn + Mn (4011 kg/ha) treatments, respectively. Licord cultivar produced the highest grain yield (3998 kg/ha) at Mn treatment, but there were no significant differences between fertilizer levels. Okapi variety showed the highest biological yield as affected by Fe + Zn (13666 kg/ha), Zn + Mn (13221 kg/ha) and control (12944 kg/ha) treatments, respectively. In this experiment, the interaction between Licord Mn, Licord (Fe + Zn + Mn) and Okapi (Fe + Zn + Mn) had the highest harvest index (35.46, 34.77 and 32.23 percent), respectively. In addition, the interaction between Licord (Fe + Zn + Mn) showed the highest silique number (369.86) per plant. In general, seed yield and its component in rapeseed varieties showed different responses to micronutrient fertilizers. According to the results of this experiment, cultivation of Okapi and Licord varieties and application of Mn and Mn + Zn fertilizers cased to enhance seed yield of canola in Arak climatic conditions.


Mhmoud Ghorbanzadeh Neghab ,
Volume 2, Issue 1 (9-2015)
Abstract

Soybean is one of the most important oil production resources in the world. In order to study of genetic diversity and relationships among quantitative and qualitative traits of 14 soybean cultivars, an experiment was conducted as a randomaized complete block design with four replications in 2013 at the Agriculture Research Farm, Shirvan Higher Education Complex. 12 traits such as seed and components yield, protein and oil content were evaluated. The results showed that there were significant differences among genotypes for all traits except protein content, which indicates the existence of genetic variations between genotypes. Zane, Century and Clombus cultivars had the highest seed yield, although, the lowest yield was achieved in Habit cultivar. Results showed that seed yield was positively and significantly correlated with number of pods per plant, number of seeds per pod, number of seeds per plant,100 seed weight, oil content, protein content and harvest index and there were significant and negative correlation between seed yield with number of days from planting to flowering . The Zane cultivar had the highest oil content of 515.8 kg ha-1. Based on the stepwise regression and path analysis the grain yield of soybean cultivars were explained by the direct and indirect effects 100 seed weight, number of pods per plant, number of seeds per pod and number of seed per plant. Considering to the residual effects and the coefficient of determination (86.7 percent), the large proportion of the variation in seed yield of soybean were determined with these four traits of seed yield. Path analysis showed that the greater and lower direct positive effects on seed yield were related to 100-seed weight and seed number per plant, respectively. In general, Zane , Columbus and Cencurty cultivars due to their high oil and seed yields can be proposed cultiveting in North Khorasan.


Nilofar Vahdi, Esmaeil Gholinezhad, Sirous Mansourifar, Leyla Gheyrati Arani , Mehdi Rahimi,
Volume 2, Issue 1 (9-2015)
Abstract

This research in order to evaluate the effect of different levels of irrigation regime on yield and yield components of soybean in Urmia region at the Urmia agricultural high school Research during 2012 using split plot based on a randomized complete block design with three replications. Drought treatments (optimum irrigation 60 mm, moderate drought stress 110 mm and severe drought stress 160 mm evaporation by evaporation pan Class A) were included in main plots and the Cultivars (Clark, Williams and Onion) were allocated in subplots. The results of variance analysis showed that the effect of drought stress on seed yield, oil and protein content was significant (P<0.01), so that the maximum and minimum oil and protein value obtained by optimum irrigation and severe drought stress conditions, respectively. However, for relative water content and leaf chlorophyll, there was no significant difference. Severe drought stress reduced the grain yield by 63 and 45% compared to the optimum irrigation and moderate stress conditions, respectively. In optimum irrigation and severe drought stress conditions, the highest seed yield, oil yield and protein yield, obtained by Onion genotype. A Clark genotype in comparison with other cultivars had the minimum seed yield, in severe drought stress conditions.


Maryam Habibi, Majid Majidian, Tayebeh Shoja, Mohammad Rabiee ,
Volume 2, Issue 2 (3-2016)
Abstract

In order to investigate the effects of boron, zinc and sulfur on quantitative and qualitative characteristics of rapeseed (Hyola 401 cultivar), an experiment was conducted at Rice Research Institute of Iran, Rasht province in 2011. A field experiment with completely randomized block design was performed with eight treatments in three replications. Treatments consisted of control, zinc was added as Zn 15% EDTA at the rate of 1.5 kg ha&minus;1 were applied to the soil, Boron was added as Borax at the rate of 1.5 kg ha&minus;1, sulfur treatment added at the rate 100 kg ha-1 before of sowing, B+Zn, B+S, Zn+S and B+Zn+S. Maximum grain yield (4157.6 kg ha-1) was obtained from S+B+Zn treatments that increased the seed yield by 48.7% compared to the control. Maximum and minimum oil content obtained from B+Zn+S (42.58%) and control (38.37%). Maximum protein (24.62%) was obtained from zinc fertilizer. The highest leaf boron, zinc and sulfur content were obtained in treatments B+Zn+S of 15.7, 26.38 and 577.4 mg kg-1 respectively, and minimum nutrients content was obtained in control. Regards to the experiment results, the application of B+S fertilizer increased the seed yield and oil content and is suggested in Rasht reign conditions.


Azade Vaseghi, Saeid Davazdahemami,
Volume 2, Issue 2 (3-2016)
Abstract

Utilization of multipurpose plants in cultivation patterns can reduce production risks. Medicinal and oilseed plants such as Niger seed and black cumin are multipurpose plants. In order to evaluate the possibility of extensive cultivation of Niger seed as a new plant and comparison of its oil and minerals with two genotypes of black cumin seed, Iranian and Indian, A randomized complete block with three replications was conducted in Isfahan in 2011. Seeds of black cumin cultivated in autumn as an alternative for cereals and seed of Niger seed cultivated in summer after harvesting of cereals. Cultivation of all of three plants were successful. Seed yield of Niger seed was 880kg/ha. It was much more than world record. It's oil seed content (about 47%), and it's worth (in competition with sunflower) can be considered as valuable parameters. The differences of minerals in Niger seed and black seed genotypes were significant, especially in Fe. The Fe content of Niger seed was 1.2 ppm (2-3 times more than Indian and Iranian black cumin).


Azade Vaseghi, Saeid Davazdahemami,
Volume 2, Issue 2 (3-2016)
Abstract

Niger seed (Guizotia abyssinica Cass.) is a multipurpose plant that has imported to Iran as a bird seed and doesn't have any scientific report in Iran. In order to evaluate the agronomic and physiological characters of Niger seed (as an oil seed and medicinal plant) in different seasons and sowing dates, some acts such as authentication of this species was done. Niger seed has been sown in autumn, spring and summer. Also in summer the effect of sowing date in a completely randomized design with 4 replications and 3 treatments (9 June, 21 June and 3 July) was evaluated in Isfahan province in 2010. According to the results, autumn and spring were not suitable season of cultivation of this plant and it can be grown in summer successfully. The effect of various summer sowing date, on most of the measured traits were significant. The best planting date was about the third planting date in Isfahan climatic conditions. The highest value of the number of capitula per plant (59.07), 1000 seed weight (3.39), seed yield per hectare (874.7 kg), number of seeds per plant (1510), seed oil (47.33) were obtained from the third sowing date. While the highest plant height (150.1cm), days to 50% flowering (67), days to 80% maturity (110) was recorded from the first sowing date.


Ali Nakhzari Moghaddam, Sakineh Ghaffari, Ali Rahemi Karizaki, Mohammad Salahi Farahi,
Volume 2, Issue 2 (3-2016)
Abstract

In order to study the effect of sulfur and Thiobacillus on some qualitative and quantitative traits of sunflower (cv. Hisun 25), an experiment was conducted as factorial based on Randomized Complete Block Design with three replications on research farm of the Gonbad Kavous University in 2013. The sulfur rate factor was in four levels: 0, 200, 400 and 600 kg sulfur per hectare and Thiobacillus bacteria factor was in four levels: 0, 10, 20 and 30 kg Thiobacillus per hectare. Results showed that the sulfur had a significant effect on plant height, 1000-seed weight and seed yield at 5% and on plant dry weight, oil percentage and oil yield at 1% probability. Effect of Thiobacillus on 1000-seed weight and seed yield at 5% and on plant height, plant dry weight, oil percentage and oil yield at 1% was significant. The maximum values of all traits were obtained from the highest amounts of sulfur and Thiobacillus. The highest plant height, 1000-seed weight, plant dry weight, seed yield, oil percentage and oil yield obtained from consumption of 600 kg S/ha. The maximum plant height, 1000-seed weight, plant dry weight, seed yield, oil percentage and oil yield belonged to consumption of 30 kg Thiobacillus/ha. The results of this study showed that effect of sulfur and Thiobacillus on some morphological traits, seed yield and yield components was less than percentage and yield of oil. This maybe has happened because of the sulfur role in oil production.


Mohammad Salahi Farahi, Faramarz Sayyedi,
Volume 2, Issue 2 (3-2016)
Abstract

In order to study the effects of different levels of sulfur along with Thiobacillus and zinc on qualitative and quantitative growth of canola cv RGS003, a factorial experiment was conducted based on an RCBD with three replications at the Agricultural Research Station of Gonbad in 2013. The first factor was the application of sulfur with Thiobacillus at four levels, i.e. without sulfur and Thiobacillus (S0), 500 kg sulfur ha-1 + 10 kg Thiobacillus ha-1 (S1), 1000 kg sulfur ha-1 + 20 kg Thiobacillus ha-1 (S2) and 2000 kg sulfur ha-1 + 40 kg Thiobacillus ha-1 (S2). The second factor consisted of two levels of zinc: without zinc (control) and 20 kg zinc sulfate ha-1. The results showed that all traits studied were significantly affected by sulfur with the exception of pod length. The effect of zinc was significant at 0.01 probability level of biological yield, seed yield, harvest index, straw yield, oil percent and oil yield. With an increase in application of sulfur mixed with Thiobacillus up to 1000 kg sulfur ha-1 + 20 kg Thiobacillus ha-1 (S2), all yield components increased except oil percent, but their further increase resulted in reduction of seed yield and yield components of canola cv RGS003. With the exception of oil content, the other traits studied were not affected by the interaction of sulfur by zinc.


Marefat Mostafavi Rad, Amin Nobahar, Mehran Gholami, Ali Ajili Lahigy, Iraj Boniadi, Shayegan Adibi, Mohammad Reza Rahimian, Ebrahim Akbarzadeh,
Volume 2, Issue 2 (3-2016)
Abstract

In order to evaluate the quantitative and qualitative yield of peanut (Arachis hypogaea L.) in response to starter nitrogen rates two separate experiments were performed in 2013 and 2014 cropping season as randomized complete block design with three replications, in experimental field of Agricultural and Natural Resources Research and Education Center of Guilan Province, Rasht, Iran. Four rates of nitrogen including of zero, 100, 150 and 200 kg/ha comprised the experimental treatment. The results of this research showed that with increment of starter nitrogen application, duration of developmental stages in peanut enhanced. The greatest pod (3561 kg/ha) and seed yield (1740 kg/ha) of peanut, grain oil (49.86 percent) and nitrogen content (3.91 percent), oil yield (867 kg/ha) and protein yield (426.5 kg/ha) were obtained at 100 kg N/ha level. Application of 150 kg N/ha showed superiority for pod number per plant (21.30) and grain number per pod (1.39). Also, application of 200 kg N/ha caused to enhance plant height (73.35 cm) and grain phosphorus content (0.437 ppm) in peanut. In addition, there was negative and significant correlation between grain yield and some traits such as day number to initial flowering, day number to the end of flowering and maturity. The correlation coefficient between grain yield and oil (r= 0.99**) and protein yield (r= 0.89**) was positive and significant. In this experiment, oil and protein yield of peanut per unit area mostly related to grain yield. In general, results showed that the application of starter nitrogen up to 100 kg/ha enhanced pod and grain yield of peanut and oil and protein yield in Guilan province climatic condition.


Sanaz Heydari, Mohsen Movahhedi Dehnavi, Alireza Yadavi,
Volume 3, Issue 1 (9-2016)
Abstract

Sesame is an oily and medicinal seeds adapted to tropic and semi-tropic regions of the world but cultivation of its new accessions has been developed in temperate regions. To evaluate the effect of plant density on growth indices, seed oil percentage and seed yield of three sesame genotypes, an experiment was conducted as factorial based on a randomized complete block design with three replications in 2014, in Rostam region, Fars, Iran. First factor was planted density at five levels (15, 25, 35, 45 and 55 plant m-2) and the second factor was three sesame genotypes (Nurabad, Borazjan and Darab 14). The result showed that maximum and minimum LAI was achieved from Nurabad and Darab 14 and also from 15 and 55 plant m-2, respectively. Growth indices analyzing showed that Nurabad was better than the two genotypes. Maximum CGR ranged from 1.96-2.62 g m-2 GDD-1. Nurabad and Borazjan had the maximum RGR at the beginning of the growing season. Plant density decreased oil percentage and Borazjan had the maximum seed oil percentage. Generally, regards to the results, Nurabad with 55 plant m-2 density performed better than other genotypes in Rostam region. Borazjan in 55 plant m-2 density can be a good alternative for Nurabad.


Somaye Esmaili , Mahmoud Reza Tadayon , Ali Tadayyon , Mohammad Rafiee Alhossainy ,
Volume 3, Issue 1 (9-2016)
Abstract

In order to evaluate the effect of different levels of humic acid on some quantitative and qualitative traits of cotton a factorial field experiment in a randomized complete block design with three replications was conducted in Kashan under salinity soil condition in 2013.Treatments included three cotton cultivars of Varamin, Line 43200 and Khordad as first factor, and six foliar ‌treatment included without humic acid and chemical fertilizer‌ (T1), without humic acid with chemical fertilizer (T2), 3 l/ha humic acid without chemical fertilizer (T3), 1 l/ha humic acid with chemical fertilizer (T4), 3 l/ha humic acid with chemical fertilizer (T5), and 6 l/ha humic acid with chemical fertilizer (T6).The results showed that humic acid significantly increased oil and protein content, yield, seed yield, fiber yield and 1000 seeds weight. In T5 treatment, gin, lint, and grain yields, 1000-grain weight, and oil content increased by 32.74%, 31%, 33.69%, 5.32%, and 2.7%, respectively. Using 3 liters of humic acid without the application of chemical fertilizer increased seed protein yield by 63.4%.


Valiollah Rameeh, Mohammad Aghabozorgi,
Volume 3, Issue 1 (9-2016)
Abstract

In order to determine the appropriate sowing dates, seed rates and their interaction effects on yield and yield components, oil and protein contents of soybean variety Sari, a split-plot experiment based on a randomized complete blocks design with four replications was carried out at Qaemshahr Gharakeil Agriculture Research Station in 2009. Five sowing dates including 15th May, 31th May, 15th June, 1th July and 16th July were considered as main plots and three different seed rates including 60, 75 and 90 kg ha-1 as the sub-plots. The results showed that all of yield components were affected by sowing dates and also seed rates had a significant effect on the number of pods per plant. Although due to increasing seed rates, yield components, such as pods per plant were decreased, but because of the increasing number of plants per square meters, seed yield not decreased significantly. Therefore for economically saving 60 kg ha-1 of seed rates will be preferred. In this study high mean value of seed yield, biological yield and 1000-seed weight was achieved in first sowing date and all of the yield component characters were decreased in late sowing dates. Harvest index was increased in late sowing dates and it was not significantly affected by seed rates. Sowing dates and seed rates had not significant effects on oil and protein percentages, but due to significant effects of sowing dates on seed yield, oil and protein yields were significantly affected by sowing dates. In this study higher seed yield was belonged 60 kg ha-1 of seed rate in first and second sowing dates which have not significant statistically differed.



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