Residual effect of phosphorus fertilizer and phosphorus recycling in a farming system Ⅲ. Recycling rate of P and N in feed stuffs and bedding materials through a feeding-composting cycle and recoveries of P and N in organic manure

Abstract

Abstract: Afive years experimental results indicate that thee average loss rate of Ncontained in harvested products through a feeding-composting cycle is about 36% and that of Pis about 25%. Under high-yield conditions, the amounts of recycled Nand Pfrom 80% of harvested products and through a feeding-composting cycle in a farming system are about 80kg N/ha and 14kg P/ha respectively, equivalent to half of Nand full of Pfrom fertilizers applied every year to the system.

Key words: Phosphorus cycle, Farming system, Feeding-composting system, Recovery of P in organic manure

Yin Xiuyan, Zhang Lu, Yu Wantai, Shen Shanmin. Residual effect of phosphorus fertilizer and phosphorus recycling in a farming system Ⅲ. Recycling rate of P and N in feed stuffs and bedding materials through a feeding-composting cycle and recoveries of P and N in organic manure[J]. Chinese Journal of Applied Ecology, 1992, 3(3): 236-239.

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Residual effect of phosphorus fertilizer and phosphorus recycling in a farming system Ⅲ. Recycling rate of P and N in feed stuffs and bedding materials through a feeding-composting cycle and recoveries of P and N in organic manure

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