Pedosphere 32(1): 39--48, 2022
ISSN 1002-0160/CN 32-1315/P
©2022 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effects of different continuous fertilizer managements on soil total nitrogen stocks in China: A meta-analysis |
Pengfei DANG1, Congfeng LI2, Tiantian HUANG1, Chen LU1, Yajun LI1, Xiaoliang QIN1 , Kadambot H. M. SIDDIQUE3 |
1College of Agronomy, Northwest A&F University, Yangling 712100(China);
2Institute of Crop Science, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology, Ministry of Agriculture, Beijing 100081(China);
3Institute of Agriculture and School of Agriculture&Environment, The University of Western Australia, Perth WA 6001(Australia) |
| ABSTRACT |
| Soil total nitrogen is critical for crop productivity and related to agricultural managements. However, the effects of different fertilizer applications on soil total nitrogen storage are not well understood. To quantify soil total nitrogen storage under different fertilizer management practices and explore the effects of climate, soil texture, experimental duration, and cropping system on soil total nitrogen storage in China, we conducted a meta-analysis of 67 fertilizer management strategies from experiments conducted over a period of at least three years. This meta-analysis included 854 observations of changes in soil total nitrogen stock (TNS) under no fertilizer application (control, CK), chemical fertilization with nitrogen, phosphorus, and potassium (CF), CF plus straw retention (CFS), and CF plus manure addition (CFM) relative to initial soil TNS. The CFM and CFS treatments increased soil TNS, and the CFM treatments increased soil C/N ratio the most. The longer the experimental duration, the greater the increase in soil TNS in the CF, CFS, and CFM treatments. Soil texture and crop type significantly affected the changes in soil TNS. The experimental duration, initial soil TNS, soil C/N ratio, and cropping system had significant linear correlations with the change in soil TNS. Temperature and precipitation were not correlated with soil TNS. Results of random forest modeling indicated that the most important factor affecting changes in soil TNS was experimental duration (positive correlation), followed by initial soil TNS (negative correlation). The CFM treatments had the largest increase in soil TNS under various conditions. We recommend promoting CFM to improve soil fertility in farmlands globally. |
| Key Words: chemical fertilizer,climate change,cropping systems,manure,soil fertility,straw retention |
| Citation: Dang P F, LI C F, Huang T T, Lu C, LI Y J, Qin X L, Siddique K H M. 2022. Effects of different continuous fertilizer managements on soil total nitrogen stocks in China: A meta-analysis. Pedosphere. 32(1): 39–48. |
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