在河南省几种主要土壤类型上，对几种主要作物进行了施硫肥试验。结果表明，施硫经济效益较好，小麦增产３．５％～１３．４％，玉米增产３．５％～１１．７％，大豆增产７．１％～１３．５％。在施硫量相同情况下，小麦、玉米施硫磺增产效果大于石膏，而大豆施石膏的增产效果则优于硫磺。如要维持当前土壤硫素水平，每年需通过施肥补充３．１～５．６ｋｇ／亩。 In several major soil types in Henan Province, several major crops were tested for sulfur fertilization. The results showed that the economic benefits of applying sulfur were better. The yield of wheat increased 3.5% ~ 13.4%, that of corn increased 3.5% ~ 11.7% and that of soybean increased 7.1% ~ 13.5%. Under the same condition of applying sulfur, the yield increase effect of wheat and corn applying sulfur is greater than that of gypsum, while the yield of soybean gypsum is superior to that of sulfur. To maintain the current level of soil sulfur, the annual need to add fertilizer 3.1 ~ 5.6kg / mu.