Nutrient runoff and leaching under various fertilizer treatments and pedogeographic conditions: A case study in tobacco ( Nicotiana tabacum L. ) fields of the Erhai Lake basin, China

文献类型： 外文期刊

第一作者： Wang, Chen

作者： Wang, Chen;Wei, Zhibiao;Guo, Yingxin;Cui, Zhenling;Miao, Qi;Wei, Zhibiao;Li, Junying;Fan, Zhiyong;Hu, Yanxia;Sun, Junwei;Zhang, Hong

作者机构：

关键词： Leaching; Runoff; Flue -cured tobacco; Organic fertilizer; Influence factors

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.2； 五年影响因子：5.9 ）

ISSN： 1161-0301

年卷期： 2024 年 156 卷

页码：

收录情况： SCI

摘要： To ensure water security, it is crucial to understand the characteristics of nitrogen (N) and phosphorus (P) in water and to reduce their inputs. We conducted a 2 -year trial (2021 -2022) in tobacco fields across three sites in the Erhai Lake basin, China, to comprehensively measure and summarize N and P loss through runoff and leaching for four fertilizer treatments: no fertilizer (CK); farmers ' traditional organic fertilizer (FP); chemical fertilizer (CF); and a combination of organic and inorganic fertilizer (OIC). The highest N concentrations were detected in leachate in the early tobacco growth stage, whereas the highest P concentrations occurred in runoff in the middle growth stage. Compared to FP, the OIC treatment improved nutrient uptake in flue -cured tobacco, while also reducing N loss through runoff and leaching by 45.37% and 19.34%, and reducing P loss by 7.22% and 8.26%, respectively. Correlation analyses revealed positive relationships of nutrient loss with soil organic matter content and nutrient inputs; elevation and soil water content exhibited varying correlations with different nutrients. These findings provide a theoretical foundation for the effective management of agricultural non -point source pollution in the Erhai Lake basin and shed light on water pollution pressures worldwide.

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