| Effects of carbon and nitrogen application ratio on the accumulation of photosynthetic products and yield of cotton in residual film\|contaminated cotton fields |
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| DOI：10.7606/j.issn.1000-7601.2025.05.12 |
| Key Words: cotton residual film contamination of cotton fields carbon\|nitrogen application ratio dry matter accumulation yield |
| Author Name | Affiliation | | WANG Shi | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | WU Fengquan | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | WU Haoyu | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | LIU Kexin | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | LIU Xiaowei | Western Agricultural Research Center of the Chinese Academy of Agricultural Sciences, Changji, Xinjiang 831100, China | | LIN Tao | Institute of Economic Crops, Xinjiang Academy of Agricultural Sciences, Key Laboratory of Crop Physiology and Ecology and Cultivation in Desert Oasis of the Ministry of Agriculture and Rural Areas, Urumqi, Xinjiang 830091, China | | GAO Gang | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | YIN Caixia | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | CHEN Baiqing | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | DUAN Yushui | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | ZHANG Hao | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China | | TANG Qiuxiang | College of Agriculture, Xinjiang Agricultural University, Cotton Engineering Research Center of the Ministry of Education, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| To investigate the effects of carbon\|to\|nitrogen application ratio on the accumulation of photosynthetic products and yield in cotton fields contaminated with residual plastic film, a two\|year field trial was conducted in a typical residual film contaminated area of Xinjiang from 2023 to 2024. Using ‘Zhongmian 113’ as the experimental material, cow manure compost (C∶N=12∶1) and inorganic fertilizer (urea) were employed. Under equal nitrogen application rate (375 kg·hm-2), four different carbon\|to\|nitrogen ratio fertilizers were formulated.The ratios were 0∶1 (CF), 3∶1 (OF1), 6∶1 (OF2), and 9∶1 (OF3), with a control group receiving no nitrogen fertilizer (CK). The study analyzed the effects of different carbon\|to\|nitrogen ratios on dry matter accumulation, distribution, and yield formation in residual film\|contaminated cotton fields. The research results of two years showed that different carbon\|nitrogen application ratios have a certain promotional effect on cotton growth, above\|ground dry matter accumulation and distribution, increasing the number of bolls per plant and boll quality, which was conducive to improving cotton yield. As the carbon\|to\|nitrogen ratio increases, the accumulation of dry matter during the cotton growth period, the accumulation of dry matter in reproductive organs, and lint yield exhibited a trend of first significantly increasing and then significantly decreasing, with all showing the pattern OF2 > OF3 > OF1 > CF. Compared with other carbon\|to\|nitrogen ratios, the average plant height, stem thickness, number of leaves, and number of fruit branches were on average 3.66%, 1.07%, 0.97%, and 1.22% higher than the CF treatment, respectively. The rapid accumulation rate of dry matter was higher, and the dry matter accumulation increased by 7.50% and 10.35%, respectively, compared with the 0∶1 (CF) treatment and no nitrogen fertilizer (CK) treatment. The distribution ratio to reproductive organs increased by 5.58%~15.63% compared with other treatments, and the number of bolls per plant and single boll weight of OF2 increased by 9.41% and 5.52%, respectively, compared to the CF treatment, resulting in a 9.93% to 33.46% increase in lint yield compared to other treatments. Furthermore, correlation analysis revealed that the most significant correlations were observed between seed cotton yield and dry matter accumulation, boll number, accumulation in vegetative organs, and accumulation in reproductive organs. These results indicated that a carbon\|to\|nitrogen ratio of 6∶1 has a positive effect on cotton growth, above\|ground dry matter accumulation and distribution, increasing the number of bolls per plant and boll weight, thereby contributing to higher cotton yields. |
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