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一、试验目的冀东平原是河北省商品粮基地之一.随着生产条件的改善,种植制度由一年一收的少收制,向两年三收,一年两收的多收制演变,粮食平均亩产达350～400公斤,高的已突破500公斤。面临粮食产量持续上升的新形势,可望粮食亩产超过500公斤的地块,将会大批涌现。在总结群众亩产500公斤轮作经验的基础上,为适应客观生产形势的发展需要,从1979～1981年,在本所进行了多收制粮食亩产500公斤的轮作试验。
First, the purpose of the experiment Jidong Plain is one of the commodity grain base in Hebei Province.With the improvement of production conditions, the planting system from a small collection of income a year, two to three income, The average yield of grain reaches 350 to 400 kilograms, and the high has exceeded 500 kilograms. Faced with the new situation in which grain output continues to rise, it is expected that land plots yielding more than 500 kilograms per mu will emerge in large numbers. On the basis of summing up the mass production experience of 500 kg per mu and adapting to the development needs of the objective production situation, from 1979 to 1981, we conducted a rotation test of over 500 kg per mu of grain produced in our firm.