| Photosynthetic characteristics and yield of cotton under different nitrogen application rate in Southen Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2011.02.07 |
| Key Words: cotton nitrogen application rate photosynthetic characteristic yield |
| Author Name | Affiliation | | LUO Xinning | College of Plant Science,Tarium University, Alar, Xinjiang 843300, China | | CHEN Bing | College of Grassland and Envirornment,Xinjiang Agricultural University, Urumuqi, Xinjiang 830052,China | | ZHANG Jusong | College of Agronomy , Xinjiang Agricultural University,Urumuqi, Xinjiang 830052,China
National Cotton Research Center of Ministry of Education,Urumuqi, Xinjiang 830052, China | | JIANG Pingan | College of Grassland and Envirornment,Xinjiang Agricultural University, Urumuqi, Xinjiang 830052,China |
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| Abstract: |
| Based on an nitrogen experiment under ecological condition in Southen Xinjiang，the effect of nitrogen
fertilizer on photosynthentic characteristics and yield of cotton were investigated . The result showed that topdressing nitrogen rate could improve photosynthetic characteristics and the chlorophyll content of cotton，delay senescence of leaves and
raise net photosynt hesis rate; cotton leaves area and LAI were enhanced with reasonable N application, and LAI decreased
rapidly in later stages with excessive N rate. Shedding rate of cotton stem leaf declined when N rate was 258.75 kg/ hm2.
Cotton yield increased when N rate applied was among 0~258. 75 kg/hm2，and decreased until N rate applied exceed 258.75 kg/ hm2. |
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