Pedosphere 33(1): 172--184, 2023
ISSN 1002-0160/CN 32-1315/P
©2023 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effects of substituting chemical fertilizers with manure on rice yield and soil labile nitrogen in paddy fields of China: A meta-analysis |
| Qiong HOU1, Yuemin NI2, Shan HUANG1, Ting ZUO1, Jian WANG1, and Wuzhong NI1 |
1 College of Environmental and Resource Sciences, Zhejiang University, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Hangzhou 310058(China)
2 Agricultural Experimental Station, Zhejiang University, Hangzhou 310058(China) |
| ABSTRACT |
| Substituting chemical fertilizers with manure is an important method for efficient nutrient management in rice cropping systems of China. Labile nitrogen (N) is the most active component of the soil N pool and plays an essential role in soil fertility. However, the effects of manure substitution on soil labile N in rice cropping systems and their relationships with soil properties, fertilization practices, and climatic conditions remain unclear and should be systematically quantified. Here, we investigated rice grain yield and four types of soil labile N that have been widely reported, including available nitrogen (AN), ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3?-N), and microbial biomass nitrogen (MBN). We reviewed 187 published articles and performed a meta-analysis to quantify the effects of manure substitution on yield and soil labile N. The results showed that manure substitution increased AN, MBN, NH4+-N, and NO3?-N by 11.3%, 38.5%, 5.9%, and 8.1%, respectively. Partial substitution significantly increased the yield by 1.4%-5.9%, but full substitution significantly decreased the yield by 2.9%. The positive effects of manure substitution on yield and AN were stronger with long-term fertilization. The differences in responses varied across specific manure types, N application rates, soil properties, and climatic factors. In conclusion, manure substitution can increase soil labile N and is regarded as an efficient strategy for improving soil N fertility and a recommended measure for applying both chemical and organic fertilizers in rice systems. This study provides evidence of the effects of manure substitution on yield enhancement by increasing soil labile N. |
| Key Words: available nitrogen,climatic factors,fertilization practices,manure substitution,microbial biomass nitrogen,soil properties |
| Citation: Hou Q, Ni Y M, Huang S, Zuo T, Wang J, Ni W Z. 2023. Effects of substituting chemical fertilizers with manure on rice yield and soil labile nitrogen in paddy fields of China: A meta-analysis. Pedosphere. 33(1): 172-184. |
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