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不少国家的试验与实践证实,将玉米或高粱秸秆粉碎覆盖地面或留茬浅耕,可增加土壤有机质,保持土壤水分,并增进土壤中的二氧化碳,从而提高作物的光合效能.农作物桔秆中的营养成分很不稳定.例如,小麦秸秆中含P_2O_5 0.25—0.5%,K_2O1.0—2.25%,N O.3—0.7%;水稻秸秆中含P_2O_5 0.23—0.5%,K_2O 1.05—1.8%,N 0.15—0.25%;小麦秸秆中钙的含量为0.15—0.25%,大麦为0.15—0.42%,燕麦为0.11—0.38%;Na、Mg、Zn、S的含量相差也很大,所以各种作物秸秆的肥料价值也不相同.
Many countries experiment and practice confirmed that corn or sorghum straw crushed ground or stubble shallow tillage can increase soil organic matter, soil moisture and improve soil carbon dioxide, thereby enhancing the photosynthetic efficiency of crops. Crop orange stalk For example, wheat straw contains P_2O_5 0.25-0.5%, K_2O1.0-2.25% and N O.3-0.7%, rice straw contains P_2O_5 0.23-0.5% and K_2O 1.05-1.8% N 0.15-0.25%; the content of calcium in wheat straw is 0.15-0.25%, the content of barley is 0.15-0.42%, the content of oats is 0.11-0.38%; the content of Na, Mg, Zn, S is also very different, Straw fertilizer value is not the same.