Diagnosis and comprehensive evaluation of nitrogen nutrition in non-mulched drip irrigation cotton in southern Xinjiang based on critical nitrogen concentration
文献类型： 外文期刊
作者： Li, Guohui 1 ; Wang, Hongbo 1 ; Gao, Yang 4 ; Huang, Weixiong 5 ; Tang, Maosong 1 ; Fu, Yuanyuan 4 ; Wang, Xingpeng 1 ;
作者机构： 1.Tarim Univ, Coll Water Hydraul & Architectural Engn, Modern Agr Engn Key Lab Univ Educ Dept Xinjiang Uy, Alar 843300, Xinjiang, Peoples R China
2.Tarim Univ, Minist Educ, Key Lab Tarim Oasis Agr, Alar 843300, Xinjiang, Peoples R China
3.Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Xinjiang, Peoples R China
4.Chinese Acad Agr Sci, Inst Farmland Irrigat, Xinxiang 453002, Henan, Peoples R China
5.China Univ Geosci, Sch Environm Studies, Wuhan 430078, Hubei, Peoples R China
6.Minist Agr & Rural Affairs, Key Lab Northwest Oasis Water Saving Agr, Shihezi, Peoples R China
关键词： Cotton; Water and N transport; Yield; Critical dilution curve; TOPSIS
期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：6.5； 五年影响因子：6.9 ）
ISSN： 0378-3774
年卷期： 2025 年 316 卷
页码：
收录情况： SCI
摘要： The critical nitrogen (N) dilution curve (CNDC) describes the process of achieving the highest yield with the lowest nutrient concentration. It is influenced by species and environment, providing a new strategy for diagnosing cotton nitrogen status and its impact on cotton growth and yield. This study investigated the effects of two irrigation amounts (45 and 54 mm) and three N application rates (150, 225, and 300 kg ha(-1)). Results indicated that compared with low water treatment (W1), increasing irrigation water led to a 21.3-24.7% increase in dry matter, a 22.2-29.6 % increase in N accumulation, a 1.4-26.1 % decrease in soil N content, and a 3.9-9.0 % reduction in N percentage of reproductive organs. The nutrient network index (NNI) decreased by 2.2-6.4 %, while irrigation water productivity (WPI) decreased by 5.4-22.1 %. Compared with low nitrogen (F1), increasing N fertilization application enhanced dry matter by 7.1-20.8 % and N accumulation by 2.7-24.8 %, while also increasing the nitrogen percentage in reproductive organs by 4.0 -9.9 %. Experimental results demonstrated that moderate increases in irrigation and nitrogen application improved seed cotton yield and the partial factor productivity of N (PFPN). Under the W1 treatment, higher nitrogen application brought cotton plant N closer to a optimal condition. However, excessive water and N exacerbate N loss and result in a nutrient network index (NNI) value below 1, indicating prolonged nutrient deficiency. The TOPSIS comprehensive evaluation indicates that an irrigation water amount of 45 mm and a nitrogen application rate of 300 kg ha(-1) represent optimal water and nitrogen application strategies under water resource constraints. Conversely, an irrigation water amount of 54 mm and a nitrogen application rate of 225 kg ha(-1) are identified as the optimal strategies for achieving high cotton yields.
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