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黑土地区大豆需肥趋势及施肥对策王占哲（中国科学院黑龙江农业现代化研究所）．我国黑土地区土壤肥沃，有机质含量较高，营养比较齐全。但由于长期耕种，土壤的养分构成不断变化。致使大豆的施肥种类和数量也随之变化。如五十年代，除了少数地块施入农家肥外，其余都是白...
Fertilizer Demand Trends and Fertilization Strategies for Soybeans in Black Soil Area. Wang Zhanzhe (Heilongjiang Institute of Agricultural Modernization, Chinese Academy of Sciences). China’s black soil fertile soil, organic matter content is higher, more complete nutrition. However, due to long-term cultivation, the nutrient composition of the soil is constantly changing. As a result, the type and amount of fertilizers in soybean also change. As the fifties, except for a few plots into the manure, the rest are white ...