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Showing 3 results for Seed Moisture
Saman Sheidaei, Hossein Heidari Sharif Abad, Aidin Hamidi, Ghorban Nour Mohammadi, Ali Moghaddam,
Volume 2, Issue 2 (2-2016)
Volume 2, Issue 2 (2-2016)
Abstract
In order to assess seed deterioration of soybean at Ardebil province, this study was conducted as a factorial experiment based on randomized complete block design in 2014. The treatments consisted of germination ability, seed moisture content and seed storing conditions. Germination ability treatment was concluded of three germination levels: 80%, 85% and 90%. Also, three rates of seed moisture content including 10%, 12% and 14%; and two seed storing conditions including seed storage of Moghan and controlled storage were considered as second and third treatments. The results indicated that seed quality significantly reduced by increasing the seed moisture content up to 14% and this moisture content was determined as inappropriate moisture for soybean seed storage. Seeds with high moisture content showed significantly lower normal seedlings percent, germination rate and seedling vigor indices. However, there was no significant difference between 12% and 10% seed moisture contents, so it can be concluded that 12% seed moisture content is proper moisture for soybean seed storage. According to the results, enhancement of seed moisture content more than 12% will result in more accelerated deterioration of soybean seed, in a way that seeds with higher moisture content, especially at inappropriate seed storage conditions will lose their quality and will cause yield reduction at field due to low plant density aroused from inadequate seedling emergence.
Mohammad Mehrabi Kooshki, Ali Moradi, Hamidreza Balouchi, Roya Behboud, Hojatollah Latifmanesh,
Volume 9, Issue 1 (9-2022)
Volume 9, Issue 1 (9-2022)
Abstract
Extended Abstract
Introduction: Pulses are among the best sources of plant protein and important components of crop rotation, which in recent years, have been considered one of the major options for plant research. Seed storage is one of the important traits in legume breeding. Storage temperature, seed moisture content, and storage duration are the most important factors affecting seed quality during storage. Inappropriate storage conditions lead to deterioration and reduction of seed quality during storage, which is severely affected by the environmental conditions of storage.
Materials and Methods: This research was conducted at the Seed Technology Laboratory, Faculty of Agriculture, Yasouj University in 2014 as a three-way factorial based on the completely randomized design with 5 replications of 20 seeds. Seeds with moisture content at 5 levels (6, 10, 14, 18, and 22%) and storage temperature at 4 levels (15, 25, 35 and 45 °C) were stored for 9 months (0, 30, 60, 90, 120, 150, 180, 210, 240 and 270 days). After sampling at the end of each month, a standard seed germination test was done using the pleated paper method in a germinator at 25 °C for 10 days. Also, an electrical conductivity test of the electrolytes leaked from the seeds incubated for 24h in water at 20 ˚C was done with 4 replicates. Some germination attributes and electrical conductivity of the electrolytes leaked from the seeds were measured according to standard methods.
Results: According to the results, interaction effects of storage temperature, seed moisture content, and storage duration on germination indices and electrical conductivity of bean seeds were significant (P<0.1). The germination trend during storage at 15 °C and seed moisture content of 6% decreased from 94% to 81% after 270 days of storage, so that germination decreased to 35% under similar moisture content after 270 days of storage as temperature increased from 15 to 45 °C. As the storage time passed, electrical conductivity increased and this increase was more pronounced at higher temperatures. Viability constants were calculated 9 months after storage using the seed viability equation, in which KE, CH, CW, and CQ were calculated -5.39697, 0.03201, 2.13041, and 0.000017, respectively.
Conclusions: The results showed that the electrical conductivity of the leaked material increased with increasing storage temperature and seed moisture content, which led to lower viability of seeds. At 15 °C and 6% seed moisture content provided better conditions for seed survival during the 9-month storage time compared with all other temperatures and moistures and had the lowest rate of deterioration. The results showed that with increasing seed temperature and moisture so that they had to lowest electrical conductivity of the leaked material from seeds and deterioration rate.
Highlights:
1- Over storage duration, the electrical conductivity of materials leaked from seeds increased.
2- With increasing moisture content up to 22% and storage temperature up to 45 °C, the electrical conductivity of the material leaked from seeds increased.
3- Bean seed viability coefficients were calculated to evaluate seed viability under controlled storage conditions.
Farzad Delfan, Feizollah Shahbazi, Hamidreza Esvand,
Volume 10, Issue 2 (3-2024)
Volume 10, Issue 2 (3-2024)
Abstract
Extended abstract
Introduction: The seeds of agricultural products are constantly subjected to impact forces from machines from the moment they are harvested to the time they are transferred into storage. Improper design and performance of machines in each of these stages can cause mechanical damage to seeds. Mechanical damage caused by free fall on the seed of agricultural products, which occurs during different stages of harvesting, transportation and other processes, causes a decrease in their quality and an increase in waste. This study aimed to evaluate the amount of mechanical damage caused to chickpea seeds due to the impact of free fall.
Materials and methods: The experiment was conducted as a factorial in the form of a completely randomized design with three replications. The factors included drop height (3, 6, 9 and 12 m), the contact surface (concrete, plywood, metal (iron) and seed-on-seed) and seed moisture content (10, 15, 20 and 25 %). The studied traits or the amount of damage to the seeds included the measurement of seed deterioration by the accelerated aging method (loss in germination percentage in the accelerated aging test) and the measurement of electrical conductivity.
Results: The results of the analysis of variance showed that all three factors (drop height, the contact surface and moisture content) had significant effects at p<0.01 on the loss in germination percentage in the accelerated aging test and changes in electrical conductivity of chickpea seeds. In terms of loss in germination percentage, the highest damage to seeds occurred in the metal contact (41.96%) and the least in the seed-on-seed treatments(29.71%). Also, the highest amount of electrical conductivity was related to the seeds dropped on the metal (36.09 μS cm-1g-1) and the lowest was related to seed-on-seed contact (21.68 μS cm-1g-1). As the drop height rose from 3 to 12 m, the loss in germination and electrical conductivity of seeds increased from 27.74 to 48.08% and from 18.72 to 40.47 μS cm-1g-1, respectively. Increasing the moisture content of chickpea seeds from 10 to 25% causes a decrease in the amount of damage to the seeds in terms of electrical conductivity (from 38.40 to 21.18 μS cm-1g-1). However, the damage was in the form of loss in germination percentage during the accelerated aging test (from 29.22 to 42.88 %).
Conclusion: The findings of this study revealed that the movement of chickpea seeds and the subsequent free fall had a notable impact on their latent damage, leading to a decrease in germination rate and alterations in electrical conductivity. Therefore, it is recommended to minimize fall height and prevent seeds from hitting hard surfaces during seed processing and transportation to mitigate the damage.
Highlights:
Introduction: The seeds of agricultural products are constantly subjected to impact forces from machines from the moment they are harvested to the time they are transferred into storage. Improper design and performance of machines in each of these stages can cause mechanical damage to seeds. Mechanical damage caused by free fall on the seed of agricultural products, which occurs during different stages of harvesting, transportation and other processes, causes a decrease in their quality and an increase in waste. This study aimed to evaluate the amount of mechanical damage caused to chickpea seeds due to the impact of free fall.
Materials and methods: The experiment was conducted as a factorial in the form of a completely randomized design with three replications. The factors included drop height (3, 6, 9 and 12 m), the contact surface (concrete, plywood, metal (iron) and seed-on-seed) and seed moisture content (10, 15, 20 and 25 %). The studied traits or the amount of damage to the seeds included the measurement of seed deterioration by the accelerated aging method (loss in germination percentage in the accelerated aging test) and the measurement of electrical conductivity.
Results: The results of the analysis of variance showed that all three factors (drop height, the contact surface and moisture content) had significant effects at p<0.01 on the loss in germination percentage in the accelerated aging test and changes in electrical conductivity of chickpea seeds. In terms of loss in germination percentage, the highest damage to seeds occurred in the metal contact (41.96%) and the least in the seed-on-seed treatments(29.71%). Also, the highest amount of electrical conductivity was related to the seeds dropped on the metal (36.09 μS cm-1g-1) and the lowest was related to seed-on-seed contact (21.68 μS cm-1g-1). As the drop height rose from 3 to 12 m, the loss in germination and electrical conductivity of seeds increased from 27.74 to 48.08% and from 18.72 to 40.47 μS cm-1g-1, respectively. Increasing the moisture content of chickpea seeds from 10 to 25% causes a decrease in the amount of damage to the seeds in terms of electrical conductivity (from 38.40 to 21.18 μS cm-1g-1). However, the damage was in the form of loss in germination percentage during the accelerated aging test (from 29.22 to 42.88 %).
Conclusion: The findings of this study revealed that the movement of chickpea seeds and the subsequent free fall had a notable impact on their latent damage, leading to a decrease in germination rate and alterations in electrical conductivity. Therefore, it is recommended to minimize fall height and prevent seeds from hitting hard surfaces during seed processing and transportation to mitigate the damage.
Highlights:
- Seed deterioration tests using accelerated aging and electrical conductivity can be used as appropriate criteria to measure the mechanical damage to chickpea seeds.
- When designing machines that come into contact with the seeds, it is important to choose surfaces made of soft materials to minimize the destructive effects of the seeds falling from greater heights.
- The moisture content during the processing and transportation of the seeds should be at an optimal level of around 15%.
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Seed Science and Technology, Seed Physiology, Seed Ecology, Modeling, Seed Health, Germination Characteristics, Seed Dormancy, Seed Ageing, Seed Storage, Seed PrimingVote
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