| Research on relativity of cotton chlorophyll and yield by zinc regulation |
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| DOI：10.7606/j.issn.1000-7601.2010.03.25 |
| Key Words: zinc cotton SPAD value yield relativity |
| Author Name | Affiliation | | ZHI Jinhu | Collee of Plant Science, Tarim University, Alar, Xinjiang 843300, China
Cotton Science Institute，Tarim Universiy, Alar, Xinjiang 843300, China | | ZHAO Shuzhen | Collee of Plant Science, Tarim University, Alar, Xinjiang 843300, China | | DUAN Huangjin | Collee of Plant Science, Tarim University, Alar, Xinjiang 843300, China | | CHAI Bozhen | Collee of Plant Science, Tarim University, Alar, Xinjiang 843300, China | | XIA Xin | Collee of Plant Science, Tarim University, Alar, Xinjiang 843300, China |
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| Abstract: |
| A field experiment was conducted to study the relativity of cotton chlorophy and yield by zinc regulation.
The results showed clearly that regardless of high or low levels of zinc, cotton leaf chlorophyll content was highest in
flourishing bud period. However, at the different stages, changes of chlorophyll content to zinc levels were different,
which resulted from the differences of metabolism capabilities and substances accumulating power through photosynthesis. A binary correlativity showed between zinc level and cotton yield. Fitting equation was y=-0.1625x2+7.8751x+280.56. However, the trends of marginal production by increasing zinc level were: quick (positive)-slow(positive)-quickly (negative)-slow (negative). At different growth stages, zinc levels for the largest value of chlorophyll con-tent of cotton functional leaf were: 20 kg/hm2 in seedling stage, 10 kg/hm2 in flourishing bud period, 30 kg/hm2 in full flowering stage, 20 kg/hm2 in bell stage and 30 kg/hm2 in boll period. |
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