Survey and quantitative analysis of arthropods diversity in organic fields such as the goose lake fragrant rice in Jiangxi

• 1、Department of Biology, East China University of Technology, Nanchang 330013

Abstract：This paper discusses the green ecological planting pattern of "spider-dominated and spider-controlled" in the organic rice field, which can solve the physiological and ecological mechanism of rice planthopper resistance. Methods: The arthropods in organic fields such as the goose lake fragrant rice were investigated and counted by the methods of spider and insect collection and identification, and carry out its quantitative analysis by using statistical software such as diversity, niche, clustering and correlation. A total of 14 genera and 20 species were collected from 9 families of Spiders, including 2 unidentified species and 43 species from 42 families. There were 3 cymbidium network species of Tetragnatha and 2 leaf peristatic hunting species of Oxyopes which are spider dominant population. There are 3 species of Diptera and 1 species of Mantedea which are predators of carnivorous insects, and 5 species of Sogatella furcifera and so on are mainly phytophagous. (1) The community structure analysis showed that the spider species richness of Tetragnathidae and Oxyopidae was higher in the goose lake fragrant rice organic field than in the 1813 organic rice control field, and that of Diptera and Coleoptera were higher in the organic field than in the control field. (2) Diversity analysis showed that, except for evenness, spider dominance, diversity and richness were higher in organic field than in control field. And except for dominance, insect diversity, richness and evenness were higher in organic field than in control field. Species distribution and SHE analysis showed that 9 species of spiders were aggregate distribution and the H trend of spider was species level and distribution remained basically stable except in the early stage, and that 17 species of insects were aggregate distribution and the H trend of insect is basically stable in the middle and late stage. (3) Clustering analysis showed that the communication frequency and community continuity of spider and insect were interlaced between the control and control fields at different sampling time. (4) Analysis of the minimum difference showed that there was no significant difference between the organic and control field except for the spider communities in the 190816 organic field and the 190816 control field (p<0.05). (5) Correlation analysis showed that there was significant correlation between spider and insect communities in different sampling time except the 190806 organic field, the 190706 control field and the 190716 control field. (6) The niche analysis showed that Ceomyza sp. and S. furcifera is the main prey of the natural enemies of Tetragnatha, and these natural enemies interact. The relatively stable food chain is formed by the larvae of Aglaomyia sp., Ochthera sp. and Aglaomyia sp. spider. In a word, spiders and insects are two important intermediate links in the food chain, which together maintain the operation and balance of organic field ecosystems such as the goose lake fragrant rice.

Keywords： the goose lake fragrant rice；organic fields；arthropods；diversity；survey；quantitative analysis