玉米-苜蓿间作的生态效应

The ecological effect of maize intercropping with alfalfa in the ecotone between agriculture and animal husbandry in northeast China

研究地区位于东北农牧交错带东段。在农牧交错地区,粮食生产与饲草生产同等重要,因此将玉米与苜蓿间作,研究了这种间作的生态效应。发现玉米与苜蓿间作,对土壤理化性质有明显改善,表现在土壤有机质质量分数上升,体积质量下降,土壤全氮、全磷、全钾质量分数升高。因此玉米与苜蓿间作在农牧交错地区具有可行性。

The study was carried out in the west of Jilin province, which belong to the ecotone between agriculture and animal husbandry in northeast China. Maize was intercropped with alfalfa because the importance of food yield is the same as that of forage yield. The ecological effect of the intercropping on the soil was studied. The physical and chemical character were improved obviously after intercropping. The organic matter content increased compared with the contrast. The soil compactness decreased. Total nitrogen, phosphorus and potassium contents increased compared with the contrast. So the intercropping is reasonable in the ecotone between agriculture and animal husbandry in northeast China.