扩汇节支促循环 推进集约持续农业  

On Enlarging Sink and Reduce Expenditure to Promote Material Circulation in Farming System

作　　者：刘巽浩[1] 

机构地区：[1]中国农业大学农学与生物技术院,北京100193

出　　处：《农业现代化研究》2010年第1期65-68,共4页Research of Agricultural Modernization

基　　金：国家科技支撑计划<农田复合生物共生循环模式与技术的研究>(编号:2007BAD89B01)

摘　　要：农作系统是一种非闭合的人工开放系统,能量与物质在流动过程中被大量散逸,保留的能量和物质将逐步减少;扩汇与节支是促进系统物质循环相辅相成的两个方面;根据能量加速散逸原理与物质非闭合流动和循环原理的扩汇节支的理论基础,分析了中国循环农业扩汇节支的空间和内容以及实现途径:适度的投入人工能物(包括科技、政策)是优化资源组合、提高能效和物质循环的关键。Farming system is a sort of man-made open system. A lot of energy and matter will be escaped while reserved free energy and matter reduced on the process of flux in farming systems. Enlarging sink and reduce expenditure consist of two directions of promoting material circulation in farming systems. According to the theoretical foundation of enlarging sink and reducing expenditure based on the principles of accelerated energy dissipation and matter open flux or material circulation have been analyzed the spaces and the contents and the ways of accomplishment in China. The key point to exploit cycle is the proper input of energy and matter including technology and policies to optimize the resources combination.

关 键 词：农作系统 扩汇 节支 循环农业 

分 类 号：S-0[农业科学]