Pedosphere 30(4): 555--562, 2020
ISSN 1002-0160/CN 32-1315/P
©2020 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Effects of long-term fertilizer applications on peanut yield and quality and plant and soil heavy metal accumulation
Xiaobing WANG1,2,3, Wuxing LIU2, Zhengao LI2, Ying TENG2, Peter CHRISTIE2, Yongming LUO2
1College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127(China)
2Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008(China)
3Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095(China)
ABSTRACT
      The status of essential and potentially toxic trace elements in soils and crops can be affected by long-term fertilization practices. This study aimed to investigate changes in peanut (Arachis hypogaea L.) yield and kernel quality, and changes in copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) concentrations in soil and peanut kernels after 16 years of continuous cropping with different fertilization treatments. Five fertilization treatments were applied at a red soil site in Southeast China:chemical fertilizer (F) containing nitrogen, phosphorus, and potassium, F + trace elements (FT), pig manure (M), M + effective microorganisms (MB), and MB + trace elements (MBT). Properties of soil and pig manure, heavy metal contents in soil and peanut kernels, and the compositions of amino and fatty acids in kernels were determined. Application of pig manure significantly increased peanut biomass, kernel yield, and crude protein and total amino acid contents in kernels, but led to higher amounts of Cu, Zn, and Cd in soil and higher amounts of Zn and Cd in peanut kernels compared with that of chemical fertilizer. There should be greater concern about potential kernel Cd and Zn contaminations resulting from long-term application of pig manure contaminated with potentially toxic metals as an organic fertilizer.
Key Words:  amino acid,chemical fertilizer,fatty acid,pig manure,potentially toxic metal
Citation: Wang X B, Liu W X, Li Z G, Teng Y, Christie P, Luo Y M. 2020. Effects of long-term fertilizer applications on peanut yield and quality and plant and soil heavy metal accumulation. Pedosphere. 30(4): 555–562.
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