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一、化肥的用量自1949年/50年至1979年/80年的三十年中,世界化肥的消费量每十年翻一番。1979/80年度与1949/50年相比,NPK化肥分别增加16.5倍、6.2倍和6.8倍,1980/81年度以来,增长速度显著减慢,1981/82年度与1980/81年度相比,NPK化肥消费量分别降低0.3％、1.7％和1.4％,是三十年中除1975年发达国家因能源危机而化肥消费量下降外,三种主要养分的消费量都下降的第一年,也是发达国家和发属中国家同时出现下降的第一年(表1)。
First, the amount of fertilizer From 1949/50 to 1979/80 in the thirty years, the world’s fertilizer consumption doubled every ten years. Compared with 1949/50, NPK fertilizers increased 16.5 times, 6.2 times and 6.8 times respectively in 1979/80. Since 1980/81, the growth rate of NPK has significantly slowed down. Compared with 1980/81, NPK Fertilizer consumption decreased by 0.3%, 1.7% and 1.4% respectively, which is the first year of three decades of decline in the consumption of three main nutrients except the decline of fertilizer consumption in 1975 in developed countries due to the energy crisis. The first year in which both the country and the country belongs to the Chinese family declined (Table 1).