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Effect of long-term organic amendments on the full-range soil water retention characteristics of a Vertisol

文献类型： 外文期刊

作者： Zhou, Hu 1 ; Chen, Chong 3 ; Wang, Daozhong 4 ; Arthur, Emmanuel 5 ; Zhang, Zhongbin 1 ; Guo, Zichun 1 ; Peng, Xinhua; 1 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 East Beijing Rd, Nanjing 210008, Peoples R China

2.Univ Nottingham, Sch Biosci, Div Agr & Environm Sci, Sutton Bonington Campus, Loughborough LE12 5RD, Leics, England

3.China Agr Univ, Dept Soil & Water Sci, 2 Yuan Ming, Beijing 100193, Peoples R China

4.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, 40 South Nongke Roacl, Hefei 230031, Peoples R China

5.Aarhus Univ, Fac Sci & Technol, Dep Agroecol, Blithers Alle 20, DK-8830 Tjele, Denmark

6.Univ Chinese Acad Sci, Beijing 100081, Peoples R China

关键词： Soil organic carbon; Plant available water; Manure

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）

ISSN： 0167-1987

年卷期： 2020 年 202 卷

页码：

收录情况： SCI

摘要： Enhancement of soil water holding capability is of great interest for the management of agro-ecosystems to increase water use efficiency and crop yields. Application of organic amendments has been reported to affect the wet range of the soil water retention characteristic (SWRC, pF <= 4.2) differently and knowledge of the impact on the dry range of the SWRC (pF > 4.2) is limited. In this study, we evaluated the effect of 33 years application of inorganic fertilizer and organic amendments, including wheat straw, cow and pig manure on the full range of the SWRC of a Vertisol. Results showed that long-term application of inorganic fertilizer did not significantly affect soil water retention. The addition of organic amendments, i.e. wheat straw, pig or cow manure in combination with inorganic fertilizer significantly increased the wet range of the soil water retention, which was attributed to improved soil structure by increased SOC content. However, plant available water content was not significantly improved by organic amendments. Application of organic amendments decreased or had no effect on soil water retention at pF > 5.5, indicating the hygroscopic water was less impacted by SOC content. Our results showed that the effects of organic amendments mainly improved the retention of the capillary water but not the adsorption of hygroscopic water. This provides new insights on the understanding of water behaviors in Vertisols.

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