Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (14): 66-71.doi: 10.11924/j.issn.1000-6850.casb2020-0486

Special Issue: 资源与环境

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Regional Distribution Characteristics and Influencing Factors of Soil Cation Exchange Capacity in Jiangxi

Kang Ting(), Zhou Chunhuo, Wei Zongqiang, Miao Yulin, Lu Zhihong()   

  1. College of Land Resources and Environment/Jiangxi Province Key Laboratory of Poyang Lake Basin Agricultural Resource and Ecology, Jiangxi Agricultural University, Nanchang 330045
  • Received:2020-09-21 Revised:2020-11-18 Online:2021-05-15 Published:2021-05-19
  • Contact: Lu Zhihong E-mail:2321065870@qq.com;luzhihong1@163.com

Abstract:

To improve soil fertility in Jiangxi Province, the regional distribution characteristics of soil cation exchange capacity and the influencing factors were studied. The ammonium acetate exchange method was used to determine the cation exchange capacity of 367 soil samples in surface soil and analyzed their regional distribution characteristics. The results showed that: (1) the content of soil cation exchange capacity in dry soil and paddy soil had a large variation, and the proportion of soil CEC content less than 10.5 cmol (+)/kg was as high as 82.02%, the paddy soil with low capability of conserving fertilizer was 2.46% higher than that of dry soil; (2) according to the proportion of soil with medium capability of conserving fertilizer, the distribution of CEC content in dry soil and paddy soil in Jiangxi was highly consistent, with the order of west Jiangxi >central Jiangxi > north Jiangxi > northeast Jiangxi > south Jiangxi; (3) the soil cation exchange capacity in Jiangxi was mainly affected by organic matter and total N (P<0.05), followed by soil pH, available N, available K, total P and total K, while available P had the least influence. In Jiangxi Province, the capability of conserving fertilizer of cultivated land is weak, and the capability of conserving fertilizer of dry soil is slightly stronger than that of paddy soil.

Key words: Jiangxi Province, dry soil, paddy soil, cation exchange capacity, distribution characteristics

CLC Number: