Effects of different agronomic practices on the selective soil properties and nitrogen leaching of black soil in Northeast China
文献类型： 外文期刊
作者： Wang, Yujun 1 ; Gao, Hongjun 2 ; Xie, Zhonglei 3 ; Zhang, Lifeng 5 ; Ma, Xiulan 1 ; Peng, Chang 2 ;
作者机构： 1.Jilin Agr Univ, Coll Resources & Environm, Changchun 130118, Jilin, Peoples R China
2.Jilin Acad Agr Sci, Inst Agr Environm & Resources Res, Changchun 130033, Jilin, Peoples R China
3.Jilin Univ, Coll Plant Sci, Changchun 130062, Jilin, Peoples R China
4.Changchun Sci Tech Univ, Coll Construct Engn, Changchun 130600, Jilin, Peoples R China
5.Jilin Normal Univ, Coll Tourism & Geog Sci, Siping 136099, Jilin, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2020 年 10 卷 1 期
页码：
收录情况： SCI
摘要： Considering the large amount and high frequency application of concentrated fertilizer nitrogen in the Black Soil Region of Northeast China, the current laboratory/field simulation study aimed to explore the pollution risk of added nitrogen in black soil to groundwater and identify effective measures to prevent and control soil nitrogen leaching with an undisturbed soil column. The results showed that the saturated nitrogen adsorption capacities increased by 1.7%, 7.7% and 18.5% in ploughing, impervious agent (starch grafted polyacrylic acid) addition, and corn straw returning treatments, respectively, relative to the control (no-till). When the collection volume of the leaching solution reached the experimental maximum (4,000 mL), the total amount of nitrogen leaching from the control soil column (i.e., the no-tillage treatment) accounted for more than 50% of the added nitrogen, indicating a great risk of nitrogen pollution in groundwater. Compared with the no-tillage treatment, the amount of nitrogen leaching from the ploughing treatment increased insignificantly, and the amount of nitrogen leaching in the following spring in the corn straw returning treatment increased by 11.2%. The amount of nitrogen leaching decreased by 12.5% in the soil sampled in autumn of the second year. The total amount of nitrogen leaching in the soil with impervious agents decreased by 40.1%. Therefore, the permeability-reducing agent could significantly reduce underground water pollution risk posed by nitrogen leaching.
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