秸秆中含有的氮、磷、钾、镁、钙、硫等元素是农作物生长必需的主要营养元素,秸秆中有机质含量平均为15%左右,湿玉米秸秆含氮量为0.61%,含磷量为0.27%,含钾量为2.28%,每亩地若还田玉米秸秆1250公斤,则相当于4000公斤土杂肥的有机含量,含氮、磷、钾相当于18.5公斤碳铵、10公斤过磷酸钙和7.5公斤硫酸钾,还能补充其他多种 The nitrogen, phosphorus, potassium, magnesium, calcium, sulfur and other elements contained in the straw are the main nutrient elements necessary for crop growth. The average organic matter content in the straw is about 15%, the moisture content in the wet corn straw is 0.61%, and the phosphorus content is 0.27% potassium content of 2.28%, if the return of acres of corn stalks 1250 kg, equivalent to 4000 kg soil organic fertilizer content, nitrogen, phosphorus and potassium equivalent to 18.5 kg of ammonium bicarbonate, 10 kg of superphosphate Calcium and 7.5 kg of potassium sulfate, but also add a variety of other