有机质在土壤中的变化取决于土壤有机质分解的损耗率和作物秸秆与根系在土壤中形成新的有机质的增长率。在目前情况下,玉米生产只应从田地里收获籽粒,玉米秸秆和根应留在地里并且通常还要翻入地下。这样,土壤有机质才能达到平衡,农 The change of organic matter in soil depends on the rate of loss of soil organic matter decomposition and the rate of growth of new organic matter formed in soil by crop stalks and roots. In the current situation, corn production should only harvest grain from the field, corn stover and roots should be left in the ground and often also turned underground. In this way, soil organic matter to achieve balance, agriculture