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| Relationship Between the N Concentration of the Leaf Subtending Boll and the Cotton Fiber Quality |
| WANG You-hua, ZHAO Xin-hua, CHEN Bing-lin, GAO Xiang-bin , ZHOU Zhi-guo |
1.College of Agriculture, Nanjing Agricultural University, Nanjing 210095, P.R.China
2.Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang 2633206, P.R.China |
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摘要 This experiments were conducted in Nanjing (118º50´E, 32º02´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 stagespecific 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.
Abstract This experiments were conducted in Nanjing (118º50´E, 32º02´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 stagespecific 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.
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Received: 26 March 2012
Accepted:
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| Fund: This research was funded by the National Natural Science Foundation of China (30771279) and the Specialized Research Funds for the Doctoral Program of Higher Education, China (20080307001). |
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Corresponding Authors:
Correspondence ZHOU Zhi-guo, Tel: +86-25-84396129, Fax: +86-25-84396813, E-mail: giscott@njau.edu.cn
E-mail: giscott@njau.edu.cn
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Cite this article:
WANG You-hua, ZHAO Xin-hua, CHEN Bing-lin, GAO Xiang-bin , ZHOU Zhi-guo.
2012.
Relationship Between the N Concentration of the Leaf Subtending Boll and the Cotton Fiber Quality. Journal of Integrative Agriculture, 12(12): 2013-2019.
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