Influence of duration of storage and pre-sowing electromagnetic treatment on the development of the primary root system of cotton seeds

Agricultural Science and Technology Pub Date : 2021-12-01 DOI:10.15547/ast.2021.04.064

M. Koleva, M. Radevska

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Abstract

Abstract. Seeds of five Bulgarian cotton varieties, stored for one and two years, were subjected to five pre-sowing electromagnetic treatments with different intensity and duration of exposure. It was found that the selected values of controllable factors had stimulating effect on the total length and total mass of sprout and root. The total length of sprout and root increased by 7.5-16.4% (p<0.05), the total mass of sprout and root increased by 7.8-12.7% (p<0.05). The best treatment options were 1[U=(8…5)kV, τ =(15…35)s] and 4[U=(6…3)kV, τ =(5…25)s]. Electromagnetic treatments had stronger positive effect on seeds stored for one year. Compared to the untreated control, corresponding to each storage period, the electromagnetic impact had stimulating effect for both storage periods: for the total length of sprout and root the increase was by 7.6-21.1% and 2.3-11.0% at option 4; for the total mass of sprout and root it was by 10.8-16.5% at option 1 and 4.5-9.1% at option 4, respectively, at one-year and two-year storage of seeds. In comparison with the control Chirpan-539 variety, untreated seeds, one-year storage, higher values for both studied characteristics were found only for seeds stored for one-year: for the total length of root and sprout at the varieties Natalia, treatment options 1 and 4, Nelina and Helius, options 2 and 4 and Chirpan-539, option 1; for the total mass of root and sprout at the varieties Nelina, options 1, 2 and 3 and Chirpan-539, option 5. Compared to the untreated control corresponding to each variety, the stimulating effect of the pre-sowing electromagnetic treatment for the two characteristics was found for all varieties, for both storage periods. The Helius variety was the most responsive to the electromagnetic impact, with the strongest stimulating effect for both characteristics, at the one-year storage of seeds the total length of sprout and root increased most strongly by 34.8-43.9% at options 1, 4 and 2[U=(6…3)kV, τ =(15…35)s], and the total mass of sprout and root increased by 48.5% at options 1.

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贮藏期和播前电磁处理对棉花种子主根系统发育的影响

摘要对储存一年和两年的五个保加利亚棉花品种的种子进行了五次不同强度和暴露时间的播种前电磁处理。结果表明，可控因子的选择值对芽和根的总长度和总质量有刺激作用。芽和根的总长度增加了7.5-16.4%（p＜0.05），芽和根总质量增加了7.8-12.7%（p＞0.05）。电磁处理对贮藏一年的种子有较强的正效应。与未处理的对照相比，对应于每个储存期，电磁冲击对两个储存期都有刺激作用：选择4时，芽和根的总长度分别增加了7.6-21.1%和2.3-11.0%；在种子贮藏一年和两年时，选择1和选择4的芽和根总质量分别提高了10.8-16.5%和4.5-9.1%。与对照Chirpan-539品种相比，未经处理的种子，一年储存，仅在储存一年的种子中发现两个研究特征的值更高：对于Natalia品种的根和芽的总长度，处理方案1和4，Nelina和Helius，方案2和4，以及Chirpan-593，方案1；对于品种Nelina（选项1、2和3）和Chirpan-539（选项5）的根和芽的总质量。与每个品种对应的未处理对照相比，在两个贮藏期内，播种前电磁处理对所有品种的两个特性都有刺激作用。Helius品种对电磁冲击的反应最为强烈，对这两个特性的刺激作用最强，在种子储存一年时，在选项1、4和2[U=（6…3）kV，τ=（15…35）s]，芽和根的总长度增加了34.8-43.9%，而在选项1，芽和根部的总质量增加了48.5%。

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Agricultural Science and Technology

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11 weeks