玉米不仅粮食产量高,秸秆、根茬的数量也很大。玉米的秸秆、根茬还田后在土壤中发挥着非腐解有机物的培肥作用,不仅成为土壤有机质的重要给源,而且使土壤中已渐老化的腐殖物质得到更新,从而保持地力常新。这对保持一个良性循环的农田生态系统具有重要意义。传统农业认为刨除根茬才算“精耕细作”的观念要改变,建立根茬还田(保留根茬)的农作制度,以充分发挥玉米在农田生态中的积极作用。 Corn is not only high yield of grain, straw, stubble is also a large number. Corn stalks, stubble back to the soil after playing the role of non-decomposing organic fertilizer, not only become an important source of soil organic matter, but also in the soil has been aging humus material has been updated to maintain soil fertility new. This is of great importance to maintaining a virtuous circle of farmland ecosystems. Traditional agriculture believes that it is necessary to change the concept of “intensive cultivation” to eliminate root stubble, and establish a farming system of stubble returning (keeping root stubble) to give full play to the positive role of maize in farmland ecology.