Scholarlink

<p>This study aimed to evaluate the effects of organic nitrogen substitution for chemical nitrogen on cotton yield, dry matter accumulation, and soil health in drip-irrigated cotton fields in Xinjiang, China. The goal was to identify an optimal organic nitrogen substitution rate that balances productivity and ecological sustainability in arid agricultural systems.&#xa0;A three-year field experiment (2021–2023) examined six treatments with varying organic nitrogen (ON) substitution rates: control with no fertilization (CK), chemical fertilizer only (CF), and four organic nitrogen substitution treatments at 25% (T1), 50% (T2), 75% (T3), and 100% (T4) replacement rates.&#xa0;Substituting 25% of chemical nitrogen with organic nitrogen (T1 treatment) consistently achieved the highest seed cotton yield across all three years, with increases of 4.16%, 3.60%, and 6.19% compared to chemical fertilizer alone (CF) in 2021, 2022, and 2023, respectively. The T1 treatment also enhanced nutrient uptake compared to CF, with nitrogen, phosphorus, and potassium accumulation increasing by 22.5%, 19.2%, and 13.3%, respectively, over the three-year period. All organic nitrogen substitution treatments (T1, T2, T3, and T4) increased soil microbial biomass carbon, nitrogen, and phosphorus by 17.8%-224.7% compared to both the no-fertilizer control (CK) and chemical fertilizer alone (CF), with the magnitude of improvement being proportional to the organic substitution rate. These findings demonstrate the superiority of the T1 treatment in promoting both productivity and soil health.&#xa0;The partial substitution of chemical nitrogen with 25% organic nitrogen represents an optimal integrated nutrient management strategy for arid regions. This approach optimizes cotton yield, enhances nutrient uptake, and improves soil health by increasing microbial activity and balancing stoichiometric ratios. The study demonstrates the feasibility of integrating organic fertilizers to achieve long-term productivity and sustainability in cotton farming systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Organic Nitrogen Substitution for Chemical Nitrogen Fertilizer: A Three-Year Field Study on Yield, Dry Matter Accumulation, and Soil Health in Drip-Irrigated Cotton Fields in Xinjiang, China

  • 期刊论文

  • 发表日期：

    2025年11月18日

查看全文
  • Abudukeyoumu Abudurezike,
  • Linxin Fan,
  • Halihashi Yibati,
  • Yan Zhang

摘要

This study aimed to evaluate the effects of organic nitrogen substitution for chemical nitrogen on cotton yield, dry matter accumulation, and soil health in drip-irrigated cotton fields in Xinjiang, China. The goal was to identify an optimal organic nitrogen substitution rate that balances productivity and ecological sustainability in arid agricultural systems. A three-year field experiment (2021–2023) examined six treatments with varying organic nitrogen (ON) substitution rates: control with no fertilization (CK), chemical fertilizer only (CF), and four organic nitrogen substitution treatments at 25% (T1), 50% (T2), 75% (T3), and 100% (T4) replacement rates. Substituting 25% of chemical nitrogen with organic nitrogen (T1 treatment) consistently achieved the highest seed cotton yield across all three years, with increases of 4.16%, 3.60%, and 6.19% compared to chemical fertilizer alone (CF) in 2021, 2022, and 2023, respectively. The T1 treatment also enhanced nutrient uptake compared to CF, with nitrogen, phosphorus, and potassium accumulation increasing by 22.5%, 19.2%, and 13.3%, respectively, over the three-year period. All organic nitrogen substitution treatments (T1, T2, T3, and T4) increased soil microbial biomass carbon, nitrogen, and phosphorus by 17.8%-224.7% compared to both the no-fertilizer control (CK) and chemical fertilizer alone (CF), with the magnitude of improvement being proportional to the organic substitution rate. These findings demonstrate the superiority of the T1 treatment in promoting both productivity and soil health. The partial substitution of chemical nitrogen with 25% organic nitrogen represents an optimal integrated nutrient management strategy for arid regions. This approach optimizes cotton yield, enhances nutrient uptake, and improves soil health by increasing microbial activity and balancing stoichiometric ratios. The study demonstrates the feasibility of integrating organic fertilizers to achieve long-term productivity and sustainability in cotton farming systems.