日本农村循环经济系统磷代谢分析——以北海道中札内村为例

Phosphorus Flow Analysis of Rural Circular Economy System in Japan: A Case Study of Nakasatsunai Village in Hokkaido

在介绍日本农村循环经济模式特征的基础上,采用物质流分析方法,选取日本典型农村循环经济模式进行磷代谢分析。结果表明,大量的堆肥和直接还田改善了畜禽排泄物和农村生活对水体环境的影响,但对于减少种植业引起的磷排放未起到关键作用。建议在建设新农村的同时,有必要考虑农村生活—种植业—畜牧业一体化循环经济模式,扩大农村生活废弃物的再资源化量,以减少对系统外环境的污染。

Based on the introduction to the typical Japanese rural circular economy model, phosphorus flow in a rural circular economy system is analyzed using the material flow analysis method. Results show that the use of large amounts of compost and direct application of animal manure to the field reduces the effect of wastes from livestock and rural domestic life on water environment, but it did not have any critical effect on the control of phosphorus release from crop fields. On such a basis, it is suggested that in constructing new countryside, it be wise to consider building a circular economy model integrating rural domestic life, cropping and animal rearing and expanding recycling of the wastes from rural domestic life, so as to reduce pollution to the off-system environment.