Effects of Alternate-year Cotton Seeds on Growth and Yield of Cotton Seedlings

doi:10.6048/j.issn.1001-4330.2019.07.004

Abstract

Abstract: 【Objective】 To explore the differences of seedling emergence rate, germination potential, germination rate, seedling growth, seedling leaf SOD and MDA, root morphology, yield and yield components of cotton seeds in different years (2015, 2016 and 2017) in the hope of providing a theoretical basis for the application of alternate-year seeds in production. 【Method】 In 2018, Xinluzao 51 was used as material to determine the emergence rate, germination potential, germination rate, seedling growth, SOD and MDA of seedling leaves, root morphology, yield and the constituent factors of cotton seeds every two years (2015), every other year (2016), and the year (2017), respectively. 【Result】 There was no significant difference in germination potential, germination rate, root surface area, root volume, yield and yield components among cotton seeds in different storage years. In the time of third main stem leaf, compared with the cotton seeds, the plant height, stem diameter, leaf fresh weight and dry weight, stem fresh weight, the first true leaf SOD activity increased significantly, the first and third true leaves of the MDA content were significantly reduced, stem dry weight, the third true leaf SOD, root length and seedling rate were not significantly different. Compared with cotton seeds in that year, the seedling rate of cotton seeds, the first true leaf MDA and the third true leaf SOD decreased significantly in two years, but there was no significant difference between stem diameters, leaf fresh weight, stems fresh weight and dry weight, root length, first true leaf SOD and the third true leaf MDA. 【Conclusion】 Under the condition of indoor natural storage in northern Xinjiang, the cotton seeds increased the SOD activity of leaves, reduced the MDA content of leaves, and promoted the growth of cotton seedlings in three true leaves. Cotton seeds stored for 1-2 years had no significant effect on cotton yield and yield components.

Key words: cotton seed; seedling growth; SOD; MDA; yield

摘要： 【目的】研究3个不同年份棉种的出苗率、发芽势、发芽率、幼苗生长、幼苗叶片SOD和MDA、根系形态、产量及其构成因子的差异,为隔年种子在生产中的应用提供理论基础。【方法】试验于2018年以新陆早51号为材料,分别测定隔二年(2015年)、隔一年(2016年)和当年(2017年)棉种的出苗率、发芽势、发芽率、幼苗生长、幼苗叶片SOD和MDA、根系形态、产量及其构成因子等指标。【结果】不同储藏年份间棉种发芽势、发芽率、根表面积、根体积、产量及其构成因子均无显著差异;在第三片真叶时,与当年棉种相比,隔一年棉种的株高、茎粗、叶鲜重和干重、茎鲜重、第一片真叶SOD活性显著增加,第一片和第三片真叶的MDA含量均显著降低,茎干重、第三片真叶SOD、根长和出苗率均无显著差异;与当年棉种相比,隔二年棉种出苗率、第一片真叶MDA和第三片真叶SOD均显著下降,但茎粗、叶鲜重、茎鲜重和干重、根长、第一片真叶SOD和第三片真叶MDA无显著差异。【结论】在北疆室内自然储藏条件下,隔一年的棉种在第三片真叶时提高了叶片SOD活性,降低了叶片MDA含量,促进了棉花幼苗的生长;储藏1~2 a的棉种对棉花产量及其构成因子无显著影响

关键词: 棉种, 幼苗生长, SOD, MDA, 产量

CLC Number:

S562

CHEN Min-zhi, MA Peng-cheng, WANG Wen-mao, ZHANG Wang-feng. Effects of Alternate-year Cotton Seeds on Growth and Yield of Cotton Seedlings[J]. Xinjiang Agricultural Sciences, 2019, 56(7): 1207-1213.

陈民志, 马鹏程, 王文茂, 张旺锋. 隔年棉种对棉花幼苗生长及产量的影响[J]. 新疆农业科学, 2019, 56(7): 1207-1213.

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