Does animal manure application improve soil aggregation? Insights from nine long-term fertilization experiments
文献类型： 外文期刊
作者： Guo, Zichun 1 ; Zhang, Jiabao 1 ; Fan, Jun 3 ; Yang, Xueyun 4 ; Yi, Yanli 5 ; Han, Xiaori 5 ; Wang, Daozhong 6 ; Zhu, Pin 1 ;
作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Oil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Inst Soii & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
4.Northwest Agr & Forestry Univ, State Key Lab Soil Eros & Dryland Farming, Xianyang 712100, Shaanxi, Peoples R China
5.Shenyang Agr Univ, Coll Land & Environm, Shenyang 110866, Liaoning, Peoples R China
6.Anhui Acad Agr Sci, Inst Soil & Fertilizer Res, Hefei 230031, Anhui, Peoples R China
7.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Go
关键词： Animal manure; Binding agents; Dispersing agents; Glomalin; Soil aggregate stability; Soil aggregation
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）
ISSN： 0048-9697
年卷期： 2019 年 660 卷
页码：
收录情况： SCI
摘要： Manure application is widely recognized as a method of improving soil structure and soil fertility due to additional organic matter and nutrient inputs. However, the salinity of animal manure may have a detrimental effect on soil aggregation. The objective of this study was to determine the effects of long-term animal manure application on soil aggregation, binding agents (soil organic carbon, SOC and glomalin-related soil protein, GRSP), and dispersing agents (e.g., Na+) and their relationships based on nine long-term fertilization experiments (12 to 39 yr) across China. The two red soil experiments (Qiyang, QY and Jinxian, JX) and one paddy soil experiment in Jinxian (JX-P) were conducted in southern China (precipitation above 1200 mm yr(-1)), whereas the other six experiments were established in semi-humid or arid regions in China with precipitation in the range of 500-900 mm yr(-1). Each experiment included three treatments as follows: no fertilization (Control), inorganic fertilizer (NP or NPK), and a combination of inorganic fertilizer and animal manure (NPM or NPKM). Longterm animal manure application not only significantly increased the biological binding agents (i.e., SOC and GRSP) in the nine experiments but also considerably increased the dispersing agents (i.e., exchangeable Na+) (P < 0.05), except for the paddy soil experiment. Consequently, soil aggregate stability increased after animal manure application in three experimental sites in southern China but not in the experimental sites in northern China. Aggregate stability had a positive relationship with SOC and GRSP in the experimental sites in southern China (P < 0.01) but a negative relationship with exchangeable Na+ in the experimental sites in northern China (P < 0.05). The Na+ accumulation in soils was negatively related to mean annual precipitation (P < 0.001). Our study demonstrates that the long-term application of animal manure may degrade soil structure via the Na+ accumulation. (C) 2019 Elsevier B.V. All rights reserved.
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