Effect of Long-Term Organic Amendment Application on the Vertical Distribution of Nutrients in a Vertisol
文献类型： 外文期刊
作者： Zhang, Yu 1 ; Wu, Liuge 1 ; Zhang, Xin 1 ; Deng, Aixing 1 ; Abdulkareem, Raheem 3 ; Wang, Daozhong 4 ; Zheng, Chengyan 1 ; Zhang, Weijian 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Key Lab Crop Physiol & Ecol, Beijing 100081, Peoples R China
2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Fertil Arable Soils, Beijing 100081, Peoples R China
3.Fed Univ Technol Akure, Lab Geoecol & Sustainable Food Syst, PMB 704, Akure 340252, Nigeria
4.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, South Nongke Rd 40, Hefei 230031, Peoples R China
关键词： long-term fertilization; organic amendment; soil nutrients; nitrate leaching; soil profile
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 5 期
页码：
收录情况： SCI
摘要： Soil nutrients in deep soils are important for nutrient cycling and plant growth. Organic amendments have been widely used for enhancing soil health and crop yield. However, little is known about the effects of organic amendments on the vertical distributions of soil nutrients. Based on a 32-year long-term organic amendment experiment, the objective of this study was to evaluate changes in the vertical distribution of nutrients in a soybean-wheat system Vertisol. The results showed that NPK with manure or straw application significantly increased soil organic carbon (SOC), total N, total P, alkali-hydrolyzable N, available P and available K above the 40 cm soil layer. Variations in soil micronutrients primarily occurred above the 20 cm soil layer, and the highest contents were observed for NPKWS and NPKPM, respectively. Nevertheless, large amounts of NO3--N contents accumulated in the 120-200 cm depth with manure but not straw application, indicating a high potential risk of nitrate leaching in manure treatments. These findings suggested that the application of organic amendment (manure or straw) could be recommendable for improving soil nutrients along the soil profile. Straw incorporation could be used as an alternative option for sustainable agriculture in regions with inadequate manure resources or severe nitrate leaching.
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