Runoff loss of nitrogen and phosphorus from a rice paddy field in the east of China: Effects of long-term chemical N fertilizer and organic manure applications

文献类型： 外文期刊

第一作者： Cui, Naxin

作者： Cui, Naxin;Cai, Min;Zhang, Xu;Zhou, Li;Sun, Huifeng;Chen, Guifa;Zou, Guoyan;Zhou, Sheng;Cui, Naxin;Cai, Min;Zhang, Xu;Zhou, Li;Sun, Huifeng;Chen, Guifa;Zou, Guoyan;Zhou, Sheng;Abdelhafez, Ahmed A.

作者机构：

关键词： Agricultural surface runoff; Nitrogen fertilizer; Organic manure; Nitrogen and phosphorus loss; Rice paddy field

期刊名称：GLOBAL ECOLOGY AND CONSERVATION （ 影响因子：3.38； 五年影响因子：4.167 ）

ISSN： 2351-9894

年卷期： 2020 年 22 卷

页码：

收录情况： SCI

摘要： Agrochemicals, e.g., nitrogen (N) and phosphorus (P) fertilizers are being used extensively to increase the agricultural production; however, considerable losses of these fertilizers find their way to the surrounding surface water bodies causing severe pollution and eutrophication. Such non-point source of pollution seemed to be more pronounced in the rice fields. Accordingly, a two-year (2018-2019) field study was conducted at a rice paddy field under long-term N fertilizer management practices in the rural suburb of Shanghai, China. N and P losses through the surface runoff in the paddy field were measured. Six N fertilizer practices were performed since 2011 as follows: no N treatment (N0), chemical N treatment (urea, N 46%) applied at the rates of 100 (N100), 200 (N200), 300 (N300) kg N ha(-1) and combinations of chemical and organic N fertilizers (30% organic manure) at the rates of 200 (ON200) and 300 kg N ha(-1) (ON300). Results showed that the highest runoff losses of TN (20.5 kg ha(-1)) and TP (1.66 kg ha(-1)) were respectively produced by N300 and ON300 practices during the rice growing season. TN runoff loss significantly decreased by reducing the rate of N fertilizer (P < 0.05). Comparing with N300 treatment, ON300, ON200 and N200 treatments reduced N loss by 2.4%, 27.0%, and 13.9% in 2018 and by 24.0%, 49.0% and 37.5% in 2019, respectively. Organic manure substitute decreased N loss but increased P loss from the surface runoff. The time period after fertilizer application significantly impacted N and P loss from surface runoff. The surface runoff occurring during the early stage after fertilizer applications contributed mostly to the total N loss. Consequently, the control of initial surface runoff events might be an effective strategy to attenuate the surrounding water pollution due to N surface runoff in the paddy fields. (C) 2020 Published by Elsevier B.V.

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