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基于不同配置棉花化学控顶的光谱特征和光合特征响应研究
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引用本文:王 刚,王 静,陈 兵,张国蕾,赵 静,韩焕勇, 王方永.基于不同配置棉花化学控顶的光谱特征和光合特征响应研究[J].西北农业学报,2021,(1):83~92
DOI:10.7606/j.issn.1004-1389.2021.01.010
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作者单位
王 刚,王 静,陈 兵,张国蕾,赵 静,韩焕勇, 王方永 (1.新疆农垦科学院/农业部西北内陆区棉花生物学与遗传育种重点实验室,新疆石河子 832003
2.新疆石河子职业技术学院 水利建筑工程分院, 新疆石河子 832003
3.石河子大学 农学院新疆石河子 832000) 
基金项目:新疆兵团重大专项(2016AA001-4,2);新疆兵团领军人才项目(2019CB018);兵团技术转移项目(2013BD049)。
中文摘要:旨在研究不同控顶技术对棉花光谱和光合特征的影响。设置2种行距模式(配置),4种控顶方式,分析不同配置不同控顶方式下棉花的光谱和光合特征。结果表明:控顶前,所有处理(T1~T8)棉花的叶片和冠层光谱均差异不显著。控顶后,不同行距模式(配置)下药剂控顶(T2~T4, T6~T8)的棉叶光谱反射率在可见光波段差异较小,均大于对照(T1,T5);与对照(T1,T5)相比,药剂控顶的棉花冠层反射率在近红外波段变化显著,宽窄行配置(T2~T4)和等行密植配置(T6~T8)均呈先升后降的趋势,短波红外波段变化显著,等行密植配置呈先升后降,宽窄行配置呈一直增加的趋势。药剂控顶使棉叶的净光合速率(A)、气孔导度(GH2O)、蒸腾速率(E)和胞间CO2浓度(Ci)均显著提高,不同配置间存在差异。所有控顶处理的顶叶叶面积控顶后均增加,药剂控顶与对照均差异极显著。药剂控顶的顶端棉叶有隆起,顶心内缩,株高逐渐增加7~15 cm,果枝台数均增加2~4 台,顶叶叶面积减小,差异显著,倒4果枝铃数变化较小,差异不显著。说明药剂控顶改变棉花光谱特征,提高叶片光合能力,对棉花顶部叶片和顶尖生长有一定的抑制作用。
中文关键词:化学控顶  棉花  反射率  光合  生长特征
 
Hyperspectral and Photosynthetic Characteristics of Cotton Top Controlled by Chemical Technology Based on Different Configurations
Abstract:In order to study the effect of chemical controlled top on the spectrum and photosynthetic characteristics of cotton.Two row spacing modes(configuration) and four top control modes were set in the experiment field, and the hyperspectral and photosynthetic characteristics of cotton under different top control modes were analyzed.The results indicated that the spectral reflectance of cotton leaves and canopy had no significant difference under all control top treatments(T1-T8) before the top was controlled , but it was higher than in CK(T1, T5).After the top was controlled,the spectral reflectance of cotton leaves showed little difference in the visible band, but significant differences were in near-infrared band of both two row spacing modes(T2-T4, T6-T8).And in near-infrared band, compared with CK(T1,T5),the reflectance increased and then decreased in equidistant row mode(T2-T4) and the wide and narrow rows mode(T6-T8).However, the change of cotton canopy reflectance increased first and then decreased in equidistant row mode, and increased in the wide and narrow row mode in short infrared bands under chemical controlled top treatments.The photosynthetic capacity of leaves increased, and the net photosynthetic rate(A), stomatal conductance(GH2O), transpiration rate(E) and intercellular CO2 concentration(Ci) significantly increased by controlling the top with chemicals, and it had difference under two configurations modes.After the control top treatments, the leaf area of the top leaf increased and the chemical-controlled top treatments were significantly different compared with CK.The top cotton leaves were shrunk internally, the plant height increased gradually by 7-15 cm, the number of fruit branches increased by 2-4, and the area of the top leaves decreased significantly under chemical control top treatments.It demonstrated that after the top was controlled with the chemicals,the cotton spectral characteristics were changed, the photosynthetic capacity of leaves was improved , and the growth of top leaves and apex of cotton was inhibited.
keywords:Chemical-controlled top  Cotton  Reflectance  Photosynthetic  Growth characteristics
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