Abstract: The results from a nine years experiment indicated that the average loss rate of Nand Pcontained in harvest products through a feeding composting cycle was about 30%. Under high yield conditions, the amount of recycled Nand P from 60% of harvested products and through a composting cycle in a farming system were about 55～70 kg·hm^-2 and 9～11 kg·hm^-2, respectively, equivalent to 37%～47% of Nand 36%～44% of Pfrom fertilizers applied every year to the system.