Soil nitrate accumulation and leaching in conventional, optimized and organic cropping systems
文献类型： 外文期刊
作者： Wang, Dapeng 1 ; Zheng, Liang 1 ; Gu, Songdong 4 ; Shi, Yuefeng 1 ; Liang, Long 1 ; Meng, Fanqiao 1 ; Guo, Yanbin 1 ; Ju, 1 ;
作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing, Peoples R China
2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Danzhou, Peoples R China
3.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai, Peoples R China
4.Qingdao Agr Univ, Coll Agron & Plant Protect, Qingdao, Peoples R China
5.Water Resources Protect & Res Inst, Zhengzhou, Henan, Peoples R China
关键词： sustainable agriculture; crop rotation; optimized management; environmental consequence; macronutrient
期刊名称：PLANT SOIL AND ENVIRONMENT （ 影响因子：1.799； 五年影响因子：2.169 ）
ISSN： 1214-1178
年卷期： 2018 年 64 卷 4 期
页码：
收录情况： SCI
摘要： Excessive nitrogen (N) and water input, which are threatening the sustainability of conventional agriculture in the North China Plain (NCP), can lead to serious leaching of nitrate-N (NO3--N). This study evaluates grain yield, N and water consumption, NO3--N accumulation and leaching in conventional and two optimized winter wheat-summer maize double-cropping systems and an organic alfalfa-winter wheat cropping system. The results showed that compared to the conventional cropping system, the optimized systems could reduce N, water consumption and NO3--N leaching by 33, 35 and 67-74%, respectively, while producing nearly identical grain yields. In optimized systems, soil NO3--N accumulation within the root zone was about 80 kg Nha most of the time. In the organic system, N input, water consumption and NO3--N leaching was reduced even more (by 71, 43 and 92%, respectively, compared to the conventional system). However, grain yield also declined by 46%. In the organic system, NO3--N accumulation within the root zone was generally less than 30 kg Nha. The optimized systems showed a considerable potential to reduce N and water consumption and NO3--N leaching while maintaining high grain yields, and thus should be considered for sustainable agricultural development in the NCP.
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