Soil degradation has become a global hot issue. For a long time, growers have paid more attention to the increase of soil productivity and economic benefits, ignoring the cultivation of soil. Jackfruit is a characteristic fruit tree widely planted in tropical and subtropical regions of China. Over the years, biased application of chemical fertilizer has led to the imbalance of soil use and nutrition, which not only caused low fertilizer utilization rate, decreased fruit quality, but also caused ecological and environmental problems such as soil acidification. The research on the regulation mechanism of soil ecological network on organic carbon pool under the action of organic fertilizer can provide technical support for soil fertility and sustainable use of soil in hot areas.
Network Diagram of Co occurrence of Soil Microbes, Nematode Functional Groups and Organic Carbon Components under Different Fertilization Treatments
The research team of tropical woody grain of the Spice and Beverage Research Institute, CATAS has clarified the microecological mechanism of synergetic application of organic and inorganic fertilizers at the seedling stage of jackfruit (the research results were published in Applied Soil Ecology, the paper link: https://doi.org/10.1016/j.apsoil.2021.103994 ）。 Based on this, the team carried out long-term positioning observation tests. The research results showed that the application of organic fertilizer could significantly increase the number of soil microorganisms and micro nematodes, reduce phytophagous nematodes, stimulate bacteria and saprophytic symbiotic fungi related to carbon cycle, accelerate the decomposition of organic matter by microorganisms, improve soil nutrients (total nitrogen, phosphorus, potassium, organic matter and pH), and maintain the functions of soil ecosystem, The yield is more than 20% higher than that of chemical fertilizer, which lays a good foundation for further research on the function regulation of soil ecosystem and the reduction and increase of chemical fertilizer.
This research achievement was published in Frontiers in Microbiology under the title of "Characteristics of soil microbiota and organic carbon distribution in jackfruit plant under different fertilisation regions". Su Lanxi, an assistant researcher in the Research Office of Cultivation and Agroecology, is the first author of the paper, and the corresponding author is Tan Lehe, a leading expert in the team, and Xu Yadong, an associate professor in the College of Agriculture of Zhengzhou University. The research was supported by the National Natural Science Foundation of China (41907092) and the Natural Science Foundation of Hainan Province (322QN400).
