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Genotypic variation in spatiotemporal distribution of canopy light interception in relation to yield formation in cotton

查看全文 作　　者：XING [1,2]Fangfang;HAN [1,2]Yingchun;FENG [1,2]Lu;ZHI [1,2]Xiaoyu;WANG [1,2]Guoping;YANG [1,2]Beifang;FAN [1,2]Zhengyi;LEI [1,2]Yaping;DU [1,2]Wenli;WANG [1,2]Zhanbiao;XIONG [1,2]Shiwu;LI [1,2]Xiaofei;Ll [1,2]Yabing 高影响力作者 机构地区：[1]Zhengzhou Research Base, State Key Laboratory of Cotton Biology,Zhengzhou University;[2]Institute of Cotton Research of Chinese Academy of Agricultural Sciences高影响力机构 出　　处：《Journal of Cotton Research》索引2018年第1卷第3期,共10页高影响力期刊 基　　金：funded by the National Natural Science Foundation of China(31371561) 摘　　要：Background: Within-canopy interception of photosynthetically active radiation(PAR) impacts yield and other agronomic traits in cotton(Gossypium hirsutum L.). Field experiments were conducted to investigate the influence of 6 cotton varieties(they belong to 3 different plant types) on yield, yield distribution, light interception(LI), LI distribution and the relationship between yield formation and LI in Anyang, Henan, in 2014 and 2015.Result: The results showed that cotton cultivars with long branches(loose-type) intercepted more LI than did cultivars with short branches(compact-type), due to increased LI in the middle and upper canopy. Although loose-type varieties had greater LI, they did not yield significantly higher than compact-type varieties, due to decreased harvest index. Therefore, improving the harvest index by adjusting the source-to-sink relationship may further increase cotton yield for loose-type cotton. In addition, there was a positive relationship between reproductive organ biomass accumulation and canopy-accumulated LI, indicating that enhancing LI is important for yield improvement for each cultivar. Furthermore, yield distribution within the canopy was significantly linearly related to vertical LI distribution.Conclusion: Therefore, optimizing canopy structure of different plant type and subsequently optimizing LI distribution within the cotton canopy can effectively enhance the yield. 关 键 词：COTTON CULTIVARS Light INTERCEPTION Plant type structure Boll distribution YIELD
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