城防林带果树间作类型董和（哈尔滨市香坊区农林局）人们在果树生产实践中，间作物多数以大豆为主，因为它能把空气中游离氮固在土壤中，从而增加肥力，提高地力同时又有较高的经济价值，是果树间种的理想作物之一。但是，随着农业科学技术的发展，大豆品种不断地更新换代... Urban shelterbelt type intercropping Dong He (Xiangfang District Bureau of Agriculture and Forestry, Harbin) People in the fruit tree production practice mostly soybeans, because it can free nitrogen in the air solidified in the soil, thereby increasing fertility and improve soil fertility At the same time, it has high economic value and is one of the ideal crops for fruit trees. However, with the development of agricultural science and technology, soybean varieties are continuously updated ...