秸秆还田肥效高。据测定,1亩地每年若还田1250公斤鲜玉米秸秆,就相当于增加4000公斤土杂肥的有机质含量,其氮、磷、钾含量相当于18.75公斤碳铵、10公斤过磷酸钙和7.65公斤硫酸钾,且能补充其他多种营养元素,与此同时,还改善了土壤的团粒结构和保水、吸水、透气、保温等理化性状,增加了土壤有机质含 Straw fertilizer efficiency. It is determined that 1 mu of farmland per year if the re-1250 kg of fresh corn stalks, equivalent to an increase of 4000 kg soil organic fertilizer content of organic matter, its nitrogen, phosphorus and potassium content equivalent to 18.75 kg of ammonium bicarbonate, 10 kg of superphosphate and 7.65 Kg of potassium sulfate, and can be supplemented with a variety of other nutrients, at the same time, also improved soil aggregate structure and water retention, water absorption, ventilation, insulation and other physical and chemical properties, increased soil organic matter content