关键词: EDTA-铁, EDTA-铁

Abstract: Farmland vegetable buffer benefited biodiversity conservation, biological control and soil conservation. Therefore, it was popular in Europe and America. We designed a set of vegetable buffer to control insect pests of cropland in Qubeiying Village, Shunyi, Beijing, based on the distribution of current road, ditch, side slope and ridge in the farmland. The set of buffer included three levels. The first level, main buffer, connected the semi-nature habitat in the landscape. The second level, vice-buffer, constructed a network of corridors. And the third level, inferior buffer, varied these buffer types and plants. Each of 21 vegetable buffers considered the current site condition, focused on indigenous plant, and chose the plant which attracted predators. The diverse buffer types and plants could provide diverse habitat and food to different insects or birds. Low or no disturbance management was important. The farmland vegetable buffer would be a good choose for pests control and field boundary construction.