随着人口的增长和生活水平的提高,人类对生物物质和能量的消耗日益增加,高速度地发展农业生产,是我国经济发展中极为重要的问题;从农业生态学观点来看,要发展农业生产,必须保持农业生产中的物质和能量循环,达到相对的平衡。许多学者指出 With population growth and improvement of living standards, human consumption of biomass and energy is increasing day by day. Developing agricultural production at a high speed is an extremely important issue in China’s economic development. From the point of view of agroecology, agriculture should be developed Production, we must maintain the material and energy in agricultural production cycle, to achieve a relative balance. Many scholars pointed out