Relay intercropping cover crop combined with reduced nitrogen application improves subsequent cotton agronomic traits while maintaining yield and quality

文献类型： 外文期刊

第一作者： Guo, Xiaoyan

作者： Guo, Xiaoyan;Wang, Guoping;Li, Cundong;Zhang, Yongjiang;Wang, Zhanbiao;Guo, Xiaoyan;Zhang, Zhenggui;Sun, Guilan;Xiong, Shiwu;Han, Yingchun;Wang, Guoping;Li, Yabing;Wang, Zhanbiao;Li, Yabing;Wang, Zhanbiao;Wang, Zhanbiao;Zhang, Yongjiang;Wang, Zhanbiao;Li, Yabing

作者机构：

期刊名称：CROP SCIENCE （ 影响因子：2.3； 五年影响因子：2.5 ）

ISSN： 0011-183X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Applying cover crops to reduce nitrogen (N) fertilizer application while ensuring crop productivity is a major challenge for sustainable agricultural production. However, few studies have quantified N fertilizer application reduction through the use of February orchid (Orychophragmus violaceus) cover crops with the goal of ensuring cotton productivity. We conducted field experiments in the Yellow River basin on two cropping systems, monoculture cotton (Gossypium hirsutum L) and cotton/February orchid under four levels of N application (0 [N0], 112.5 [N1], 168.75 [N2], and 225 [N3] kg N center dot ha(-1)), to evaluate the impacts of cover cropping on cotton growth parameters, yield, and quality under different N application levels. The results indicated that replacing winter fallow with February orchid prolonged the cotton growth period and increased plant height, leaf area index (LAI), and dry matter accumulation but did not improve cotton yield or fiber quality. The Cotton/February orchid system under a 168.75 kg ha(-1) N application rate improved cotton growth, and achieved yield and quality equivalent to those of monoculture cotton under a 225 kg ha(-1) N application. Further analysis revealed that February orchid cover crop and N application positively affected lint yield, whereas plant height, LAI, and dry matter accumulation (positively) and phenology (negatively) predicted lint yield and fiber quality. In conclusion, cotton relay intercropping with February orchid in combination with 168.75 kg ha(-1) N application is recommended as a suitable cropping system to reduce fallow fields and ensuring cotton productivity in the Yellow River basin and other areas with similar ecological conditions.

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