Enhancing nitrogen fertilizer productivity in cotton fields in southern Xinjiang by improving the soil microenvironment through water and nitrogen management

作者：Fengnian Zhao, Weixiong Huang, Xin Zhao, Lei Zhang, Yuanhang Guo, Hongbo Wang, Xingpeng Wang, Yang Gao · 发表于：Agricultural Water Management · 年份：2025 · DOI：10.1016/j.agwat.2025.109442 · 被引用次数：19 · 研究领域：Soil Carbon and Nitrogen Dynamics、Rice Cultivation and Yield Improvement、Research in Cotton Cultivation

Optimizing water and nitrogen management is an effective measure to reduce nitrogen fertilizer losses and environmental pollution risks. To quantify the effects of different water and nitrogen management practices on the microenvironment of drip-irrigated cotton fields without film in southern Xinjiang and partial factor productivity of N (PFP N ), this study aims to clarify the relationship between the soil microenvironment and PFP N in cotton. This study established two irrigation levels of 45 mm (W1) and 54 mm (W2), and three nitrogen application rates of 150 kg·hm −2 (F1), 225 kg·hm −2 (F2), and 300 kg·hm −2 (F3), to analyze changes in soil physicochemical properties, soil enzyme activities, soil N 2 O emissions, soil microbial communities, cotton yield, and nitrogen fertilizer productivity in cotton fields. The results showed that at the same irrigation level, increasing nitrogen application significantly increased nitrate nitrogen (NN) content by 10.76–21.23 %, ammonium nitrogen (AN) content by 25.99–54.38 %, and N 2 O emissions by 47.19–101.53 %. It significantly reduced soil PH by 1.18–2.24 %, water-filled pore space (WFPS) by 7.61–17.61 %, and PFP N by 28.67–47.59 %. Under the same nitrogen application level, increasing the irrigation quota significantly increased WFPS by 12.80 %, N 2 O emissions by 17.43 %, and soil pH by 1.27 % (p < 0.05). It significantly reduced total nitrogen (TN) by 14.93 %, NN by 8.60 %, and AN by 10.96 %. Significant differences were observed...