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氮肥在我省普遍有效,而用量最大,近年随作物的产量增加而迅速增长。据统计,1970—1980年间,全省平均每亩耕地每年增施氮化肥(纯N计)1.3—1.4斤,即每年用量平均增长7.4%,1982年又比1980年每亩每年增施了2.5斤,亩用量达29.8斤。由于偏施氮肥,使1982年氮化肥占化肥总量的75%(有效养分计)。究竟这些年来我省施氮的增产效果如何?今后增施氮肥其效益前景如何?正日益为人们所关心。
Nitrogen fertilizer is generally effective in our province, but the largest amount, in recent years with the crop yield increased rapidly. According to statistics, from 1970 to 1980, the average annual increase of 1.3-1.4 kg of nitrogen fertilizer (pure N meter) per acre of cultivated land in the province averaged 7.4% of the annual increase. In 1982, it was 2.5 times more than that in 1980 Kg, mu amount of 29.8 kg. As a partial application of nitrogen fertilizer, fertilizer in 1982 accounted for 75% of total nitrogen fertilizer (effective nutrients). After all, what is the effect of improving the yield of nitrogenous fertilizer in our province in recent years? What are the future benefits of nitrogenous fertilizer? It is increasingly concerned by people.