Relationship Between the N Concentration of the Leaf Subtending Boll and the Cotton Fiber Quality  

作　　者：WANG You-hua ZHAO Xin-hua CHEN Bing-lin GAO Xiang-bin ZHOU Zhi-guo 

机构地区：[1]College of Agriculture, Nanjing Agricultural University [2]Cotton Research Institute, Chinese Academy of Agricultural Sciences

出　　处：《Journal of Integrative Agriculture》2012年第12期2013-2019,共7页农业科学学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(30771279);the Specialized Research Funds for the Doctoral Program of Higher Education,China(20080307001)

摘　　要：This experiments were conducted in Nanjing （118~50＂E, 32~02＂N） and Xuzhou （117~11 ＂E, 34~15＂N）, Jiangsu Province, China, to study the response of fiber quality to the N concentration of the leaf subtending boll in cotton （Gossypium hirsutum L.）. Results suggested that the N dilution curve of the leaf subtending boll can accurately indicate the stage- specific plant N status for fiber development. Fiber strength is likely to be the most variable fiber quality index responding to the leaf N variation which is different in cultivars. Fiber length was the most stable index among strength, length, micronaire, and elongation. There existed an optimum leaf N concentration for fiber strength development in each stage. The optimum leaf N regression curve was very close to the N dilution curve in the middle positional fruiting branches under the 240 kg N ha-1 soil N application rate.This experiments were conducted in Nanjing （118~50＂E, 32~02＂N） and Xuzhou （117~11 ＂E, 34~15＂N）, Jiangsu Province, China, to study the response of fiber quality to the N concentration of the leaf subtending boll in cotton （Gossypium hirsutum L.）. Results suggested that the N dilution curve of the leaf subtending boll can accurately indicate the stage- specific plant N status for fiber development. Fiber strength is likely to be the most variable fiber quality index responding to the leaf N variation which is different in cultivars. Fiber length was the most stable index among strength, length, micronaire, and elongation. There existed an optimum leaf N concentration for fiber strength development in each stage. The optimum leaf N regression curve was very close to the N dilution curve in the middle positional fruiting branches under the 240 kg N ha-1 soil N application rate.

关 键 词：COTTON fiber quality leaf N concentration CELLULOSE 

分 类 号：S562[农业科学—作物学] X523[环境科学与工程—环境工程]