建国以来,我国稻田生产,通过改革栽培制度,提高复种指数,在时间上得到了较充分的利用,但在空间利用上,却一直未能引起人们的重视。长期以来,单纯种稻,经济生物群落单一。近年推广稻田养鱼,虽然有了改进,但经济生物种群仍然太少,不能充分利用自然资源,在单位时间内,物质转化率不 Since the founding of the People’s Republic of China, paddy field production in our country has been fully utilized in terms of time by reforming the cultivation system and raising the index of multiple cropping. However, in terms of space utilization, it has failed to attract people’s attention. For a long time, simply planting rice, economic biological community single. In recent years, there has been some improvement in the promotion of paddy field fish farming. However, economic and biological populations are still too few to fully utilize natural resources. In the unit time, the rate of material conversion is not high