关键词: 聚磷酸磷肥, 正磷酸盐, 油菜, 无机磷转化, 磷肥利用率, 土壤磷有效性, Fe、Mn、Zn活化

Abstract: In this study, we investigated the termite community in natural forests (tropical rain forest and evergreen broadleaved forest) and rubber plantation in Nabanhe Natural Reserve in Xishuangbanna, and explored the effects of rubber plantation on termite community structure, feeding group composition and diversity. The results are as follows: (1) A total of 397 samples of termites were collected in the three forest types, and 20 species of termites were identified belonging to 2 families and 10 genera. The dominant species were tropical termites; (2) Season was an important factor affecting the termite community, and the diversity of termites in the rainy season was higher than that in dry season; (3) The abundance, richness and diversity index of termites in the natural forests were significantly higher than that of rubber plantation. For feeding groups, the proportion of soilwood feeding termites in the rubber plantation was significantly lower than that in the natural forests, while the proportion of wood feeding termites in the rubber plantation was higher. Our results suggested that large areas of monocluture rubber plantations in tropical region have negative impacts on termite community structure and diversity. We recommend that polyculture rubber plantations as the alternative monoculture rubber plantations should be developed to protect termite diversity.

Key words: polyphosphate fertilizer, orthophosphate, soil P availability, phosphate fertilizer utilization efficiency, soil inorganic P transformation, soil available Fe, Mn, and Zn., rape