Journal of Ecology and Rural Environment ›› 2023, Vol. 39 ›› Issue (4): 480-487.doi: 10.19741/j.issn.1673-4831.2022.0084

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Soil Fertility Health and Peanut Yield in Upland Red Soils under Long-term Continuous Application of Pig Manure

SI Shao-cheng1,2, TU Chen1, WU Yu-cheng3, LI Yuan1, LUO Yong-ming1,2,3   

  1. 1. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences/CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation/Shandong Key Laboratory of Coastal Environmental Processes, Yantai 264003, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute of Soil Science, Chinese Academy of Sciences/CAS Key Laboratory of Soil Environment and Pollution Remediation, Nanjing 210008, China
  • Received:2022-01-29 Online:2023-04-25 Published:2023-04-25

Abstract: Soil fertility health is a hot topic in the study of soil health and crop productivity in cultivated land. This study focused on the effects of long-term application of pig manure on soil fertility health indicators, including soil acidity, organic matter and major nutrients. The study was conducted based on a 23-year long-term fertilization experiment (1996-2019) of upland red soil-peanut crop system at the Yingtan Red Soil Ecological Experiment Station, Chinese Academy of Sciences. To analyze the soil fertility constraints, radar plots were used, and the Soil Health Index-Area (SHI-Area) method was employed to evaluate soil health based on soil fertility parameters. The feasibility of the soil fertility health index was further validated by analyzing the data on peanut yields in the 23rd year. The study's findings revealed that the application of pig manure resulted in a significant reduction in soil exchangeable acidity when compared to chemical fertilization. Additionally, the application of pig manure increased the soil pH, organic matter, nitrogen, and phosphorus nutrient contents, ultimately elevating the overall soil health index from 0.70 to 1.20. Furthermore, the study show that the total biomass of peanut plants and the yield of peanut kernels in the plots treated with pig manure were 1.8 and 1.3 times higher, respectively, compared to those treated with chemical fertilizer. In conclusion, the study provides evidence that the long-term application of pig manure is a highly effective method to alleviate the limiting factors of high acidity, low nutrients, and low fertility in upland red soil. This approach leads to a significant improvement in soil fertility and crop yield.

Key words: upland red soil, peanuts, long-term fertilization trial, pig manure, soil fertility health index

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