Welcome to Chinese Journal of Applied Ecology! Today is Share:

Chinese Journal of Applied Ecology ›› 2019, Vol. 30 ›› Issue (11): 3795-3803.doi: 10.13287/j.1001-9332.201911.028

Previous Articles     Next Articles

Effects of environmental stresses on soil functional stability under different water management measures in a paddy field

JIN Miao-miao, HU Zheng-kun, ZHU Bai-jing, LIU Man-qiang, JIAO Jia-guo, LI Hui-xin, CHEN Xiao-yun*, HU Feng   

  1. Laboratory of Soil Ecology, College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2019-01-03 Online:2019-11-15 Published:2019-11-15
  • Contact: * E-mail: xychen@njau.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41877056), the China Agriculture Research System-Green Manure (CARS-22-G-10) and the Central Universities Fundamental Research Project (KYYJ201702)

Abstract: With the increase of global environmental changes and intensive anthropogenic activities, it is important to maintain and improve soil function. Here, we evaluated the effects of environmental stress (i.e., drying, high temperature and the combination of drying and high temperature) on soil functional stability (resistance and resilience) under three kinds of water management mea-sures, which included conventional-flooded cultivation, non-flooded with uncovered cultivation and non-flooded with straw mulching. Results showed that, compared to single environmental stress (drying or high temperature), combined stress led to lower soil fungal biomass, bacterial biomass, basal respiration, and soil functional resistance, and higher contents of dissolved organic carbon (DOC) and NH4+-N after one day treatment of stress. Combined stress significantly decreased soil functional resilience after 56 days treatment of stress. Results from the correlation analysis showed that bacterial and fungal biomass were significantly related to soil resistance and resilience. Different water management measures could regulate the effects of environmental stress on soil functional stability. Non-flooded with straw mulching treatment significantly increased the contents of soil DOC, NH4+-N, fungal biomass and bacterial biomass, resulting in higher soil functional resistance and resilience compared with conventional-flooded cultivation and non-flooded with uncovered cultivation under both single and combined stress. In summary, non-flooded with straw mulching could improve soil functional stability under environmental stress, and it could be a suitable agricultural management for non-continuously flooded rice cultivation under multiple stresses.