Comparative Study on Growth and Development of Photosynthetic Materials in Different Machine-picked Cotton Varieties

doi:10.6048/j.issn.1001-4330.2020.03.003

Abstract

Abstract: 【Objective】 According to the requirements of mechanical harvesting for cotton varieties, those more suitable for mechanical harvesting in northern Xinjiang were selected. 【Methods】 The representative early-maturing cotton varieties in the northern Xinjiang were used as testing materials, and the differences in growth, photosynthetic characteristics and yield traits were evaluated by comparison tests. 【Results】 The growth period of Xinluzao 71 was 123 d, the plant height was 80.1 cm, the height of the beginning section was 25.6 cm, and the beginning node was 6.2 knots. The plant type was compact and resistant to lodging, and the main agronomic traits quite good, which was more conducive to the later machine harvesting; Xinluzao 71 leaf area index (LAI) was more reasonable, and the leaf photosynthetic rate (Pn) and chlorophyll content (SPAD) were superior to other varieties in each growth period, which was conducive to the accumulation of dry matter. All of these promoted the increase of the number of bolls per plant, single boll weight, ginning outturn and seed cotton yield.【Conclusion】 Xinluzao No.71 has a good comprehensive performance and is suitable for harvesting in the northern Xinjiang cotton area.

Key words: machine-picking cotton; variety; growth and development; photosynthetic matter; agronomic traits

摘要： 【目的】筛选出更适宜新疆北疆地区机采的棉花品种。【方法】以新疆北疆地区代表性的早熟棉花品种为供试材料,通过品种比较试验,评价其在生长发育、光合特性及产量性状差异。【结果】新陆早71号生育期为123 d,株高为80.1 cm、始果节高度为25.6 cm、始果节位6.2节,株型紧凑抗倒伏,主要农艺性状表现较优,更利于后期机采;新陆早71号叶面积指数(LAI)合理,叶片光合速率(Pn)、叶绿素含量(SPAD)在各生育期优于其它品种,有利于干物质的积累,促进了后期单株结铃数、单铃重、衣分和籽棉产量的提高。【结论】新陆早71号综合表现较优,为适宜北疆棉区机械采收的棉花品种。

关键词: 机采棉, 品种, 生长发育, 光合物质, 农艺性状

CLC Number:

S562

CHEN Xiuling, ZHANG Jusong, CHEN Zhen, ZHANG Weitao, DOU Qiaoqiao, DAI Jianmin, HE Qingyu. Comparative Study on Growth and Development of Photosynthetic Materials in Different Machine-picked Cotton Varieties[J]. Xinjiang Agricultural Sciences, 2020, 57(3): 408-417.

陈秀玲, 张巨松, 陈振, 张玮涛, 窦巧巧, 代健敏, 何庆雨. 不同机采棉花品种生长发育及光合物质生产的比较[J]. 新疆农业科学, 2020, 57(3): 408-417.

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