【摘要】 对河南３１个县（市）５４个点的土壤硫素的测定结果表明，有４０％的点次有效硫含量较低。但在施用含硫磷肥、钾肥和有机肥的情况下，能提高土壤有效硫的含量。在中、高肥力土壤上，冬小麦施用硫肥９０ｋｇ·ｈｍ－２，可增产２．０％～９．０％；施硫肥１８０ｋｇ·ｈｍ－２增产１０．８％～１４．４％，经检验达显著水平。硫肥的增产效果主要在于增加ｈｍ－２的小麦穗数。更多还原

【Abstract】 The sulphur contents of 54 soil samples from 31 counties in Henan Province were determined.The results showed that the contents of available sulphur of 40% of the given samples were low.However,applying P,K fertilizer with sulphur and organic manure could obviously increase the sulphur contents of the soil.In soils of middle or high fertility, applying sulphur fertilizer 90kg·hm -2 and 180kg·hm -2 could significantly increase wheat yield by 2.0%～9.0% and 10.8%～14.4% respectively.Sulphur fertilizer could improve the quantity of wheat stachys in each hectare.更多还原