Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (14): 77-81.doi: 10.11924/j.issn.1000-6850.casb2021-0588

Special Issue: 生物技术

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Interaction Between Calcium and Organic Carbon in Soil: Research Progress and Prospect

ZHAO Tianxin1(), E Shengzhe1,2(), YUAN Jinhua2, WANG Yuxuan1, YAO Jiaxuan1   

  1. 1College of Resources and Environment, Gansu Agricultural University, Lanzhou 730070
    2Institute of Soil and Fertilizer and Water-saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou 730070
  • Received:2021-06-03 Revised:2021-08-09 Online:2022-05-15 Published:2022-06-07
  • Contact: E Shengzhe E-mail:1451628281@qq.com;eshengzhe@163.com

Abstract:

Soil is the material basis for the survival of plants. The content of organic carbon in soil determines the soil fertility. To provide good material conditions for plant growth and development, it is necessary to increase soil organic carbon content. Calcium is not only an essential nutrient element for plant growth and development, but also plays an important role in soil organic carbon retention. Therefore, it is essential to understand the mechanism by which calcium holds organic carbon in soil. In this paper, through the review of recent years’ domestic and overseas related literature, the main physiological functions of calcium in plants, the main forms of calcium in soil and the interaction between calcium and soil organic carbon were discussed in detail. Studies have shown that there is a significantly positive correlation between calcium and soil organic carbon content, and the exchange and organic bound calcium could affect the accumulation and transformation of SOC. At the same time, the mineral (inorganic) colloid in soil formed organic-inorganic combined humus through the bond bridge of calcium and iron and aluminum with organic matter, and calcium ions could form ion bridge on the surface of organic colloid and mineral to enhance the soil aggregates’ structure. However, there are some reports showing that soil calcium content has no obvious or negative effect on soil ability of aggregation.

Key words: calcium, physiological effect, soil organic carbon, interaction, organic-inorganic complexes, humus, aggregate

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