| Photosynthetic characteristics of cotton under crop rotation conditions |
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| DOI：10.7606/j.issn.1000-7601.2022.02.05 |
| Key Words: cotton crop rotation photosynthetic performance production fiber quality |
| Author Name | Affiliation | | ZHANG Zhanqin | Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, Xinjiang 832000, China
Key Lab of Xinjiang Production and Construction Corps for Cereal Quality Research and Genetic Improvement, Shihezi, Xinjiang 832000, China | | WANG Jianjiang | Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, Xinjiang 832000, China | | XIE Jianhui | Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, Xinjiang 832000, China
Key Lab of Xinjiang Production and Construction Corps for Cereal Quality Research and Genetic Improvement, Shihezi, Xinjiang 832000, China | | TIAN Haiyan | Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, Xinjiang 832000, China | | NIU Yuan | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China | | YANG Xiangkun | Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, Xinjiang 832000, China
Key Lab of Xinjiang Production and Construction Corps for Cereal Quality Research and Genetic Improvement, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| To study the growth and development rules of cotton under crop rotation, field experiments were carried out in the main cotton production areas of the northern slope of Tianshan Mountains for two consecutive years in 2017 and 2018. The cotton fields for four consecutive years were selected to rotate spring wheat + reseeded feed rape, and the feed rape was turned over in autumn as green manure to plant cotton in the following years. The cotton fields for more than five consecutive years were used as control to study the effects of rotation on gas exchange parameters, fluorescence parameters, rapid light curves, yield and quality of cotton in the following years. The results showed that: (1) After rotation, net photosynthetic rate of cotton was significantly increased, especially at late growth stage, this trend was more obvious, and the net photosynthetic rate increased by 44.88%~50.37%. The light energy use efficiency (LUE) and water use efficiency (WUE) were increased by 18.82%~59.17% and 28.01%~68.35% in cotton at late flowering period by rotational cropping. (2) Under the condition of inversion rotation, the photochemical activity of photosystem II (PSII) increased by 8.31%~25.59% at middle and late flowering period. The actual photochemical quantum yield of PSⅡincreased by 3.42%~23.39% in the whole growth period. The electron transfer rate increased by 47.78% and 73.28% at early and late flowering period respectively. (3) The yield of cotton increased by 6.70%~16.11% and the quality of cotton had no significant difference under the rotation mode. These experimental results indicate that after continuous cropping of cotton for a long time, using wheat + replanting fodder rapeseed as a high\|intensity land use method for crop rotation and reverse cropping could still improve the photosynthetic efficiency of cotton, so as to achieve the effect of increasing yield, but it had no significant effect on cotton quality. |
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