›› 2019, Vol. 31 ›› Issue (1): 113-120.DOI: 10.3969/j.issn.1004-1524.2019.01.15

• Environmental Science • Previous Articles     Next Articles

Changes of soil organic carbon and relationships with soil properties in rice-crayfish coculture system

GUAN Qinzhuang1,2, CHENG Yongxu1,2,3, LI Cong2, WANG Haifeng2, CHEN Huangen4, LI Jiayao1,2,3,*   

  1. 1. National Demonstration Center for Experiment Fisheries Science Education, College of Fisheries and Life, Shanghai Ocean University, Shanghai 201306, China;
    2. Center for Research on Environment Ecology and Fish Nutrition (CREEFN) of the Ministry of Agriculture and Rural Affairs, College of Fisheries and Life, Shanghai Ocean University, Shanghai 201306, China;
    3. Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding, College of Fisheries and Life, Shanghai Ocean University, Shanghai 201306, China;
    4. Fisheries Technology Extension Center of Jiangsu Province, Nanjing 210036, China
  • Received:2018-03-05 Online:2019-01-25 Published:2019-04-09

Abstract: A field experiment on rice-crayfish coculture was conducted to assess the influence on soil organic carbon in paddy field with regular rice monoculture as control. Pearson correlation analysis was introduced to explore the relationships within organic carbon, soil fertility and soil enzyme activities. It was shown that rice-crayfish coculture significantly (P<0.05) increased the contents of soil organic matter, but the soil organic carbon contents were significantly (P<0.05) decreased in rice-crayfish coculture with low C/N diet. Under rice-crayfish coculture, soil total phosphorus, soil urease showed significant (P<0.05) positive correlation with soil organic carbon, yet soil cellulose and soil organic matter showed significant negative correlation with soil organic carbon at P<0.01 and P<0.05, respectively. Soil ammonia nitrogen was significantly (P<0.05) negatively correlated with soil organic matter, yet soil cellulose was significantly (P<0.05) positively correlated with soil organic matter.

Key words: rice-crayfish coculture, organic carbon, soil enzyme activity

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