有机肥是我国传统的农家肥料,在五十年代,我区有机肥用量占总用肥量的99％以上。但是,近年来不少地方,特别是城镇郊区,由于大幅度增加化肥用量,忽视有机肥的倾向日趋严重。同时,带状种植面积逐年扩大,使绿肥种植面积相对减少,有机肥占总用肥量的比例已降到30％以下。偏施化肥的结果,使土壤有机质不断下降,土壤肥力降低,农业生产成本直线上升。科学试验表明:粮食生产的增加约有60％与土壤生产力的提高有关。要进一步 Organic fertilizer is China’s traditional farm manure, in the fifties, my area organic fertilizer accounts for more than 99% of the total amount of fertilizer. However, in many places in recent years, especially in the suburbs of cities and towns, the tendency of ignoring organic fertilizers has become increasingly serious due to the substantial increase in the amount of chemical fertilizers. At the same time, ribbon planting area expanded year by year, so that the relative reduction of green manure area, the proportion of organic fertilizer in total fertilizer has dropped below 30%. As a result of partial application of chemical fertilizers, soil organic matter is continuously declining, soil fertility is reduced and agricultural production costs are rising linearly. Scientific experiments show that about 60% of the increase in food production is related to an increase in soil productivity. Want more