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5年试验结果表明,农产品中N经由饲养-堆腐环的损失率平均为36％,P为25％。在丰产条件下,一农业系统80％收获产品经由饲养-堆腐环可循环回田的养分量约为80kgN/ha,14kgP/ha,相当于这一系统中每年化肥N用量的一半和化肥P用量的全部。有机肥料中N和P的表观利用率随施肥年限延长而有增长趋势,表明有残效迭加效应存在。5年平均,有机肥料中N和P的当季表观利用率分别约为40％和43％。
The results of the five-year trial showed that the average loss rate of N through feeding-stacking ring in agricultural products was 36% and P was 25%. Under high-yielding conditions, 80% of the harvested products of an agricultural system can be recycled back to the fields via feeding-heap loops at about 80kgN / ha and 14kgP / ha, which is equivalent to about half of the annual N fertilizer use in this system and that of fertilizer P The amount of all. Apparent utilization of N and P in organic fertilizer tended to increase with the extension of fertilization years, which indicated that there was a superposition effect of residual effects. On a 5-year average, seasonal apparent utilization of N and P in organic manures is about 40% and 43%, respectively.