锰是作物正常生长发育所必需的微量营养元素,它能够增强作物的光合作用、促进氮素代谢、调节氧化还原状况、促进作物生长发育。缺锰将引起作物产量和品质下降。河北省耕地土壤有效锰平均值为5.8ppm,其中土壤有效锰含量小于7ppm的低锰土壤面积占全省耕地的79.8％,>7～19ppm的中等水平土壤占13.4％。玉米对锰敏感,种植面积较广,随着氮、磷肥用量的增加,锰肥的施用成了日益突出的问题。1988～1991年在河北省农科院土肥所及正定、临城等地进行玉米施用硫酸锰试验,结果用硫酸锰拌种、浸种、基施的,上部生物产量分别比对照增加15.3％、8.6％、14.0％;平均每亩增产分别为34.1公斤、30.3公斤、30.2公斤,增产分别为:7.9％、6.8％、6.5％。硫酸锰拌种方法简便易行、投 Manganese is a necessary micronutrient for the normal growth and development of crops. It can enhance crop photosynthesis, promote nitrogen metabolism, regulate redox conditions, and promote crop growth and development. Manganese deficiency will lead to crop yield and quality decline. The mean value of soil available manganese in Hebei was 5.8ppm. The area of ​​low-manganese soil with less than 7ppm of soil available manganese accounted for 79.8% of the total arable land in the province, and the soil with a level of more than 7-19ppm accounted for 13.4% of the total soil. Corn is sensitive to manganese and has a wide planting area. With the increase of the amount of nitrogen and phosphate fertilizer, the application of manganese fertilizer has become an increasingly prominent issue. From 1988 to 1991, maize was subjected to manganese sulphate test in Soil and Fertilizer Institute of Hebei Academy of Agricultural Sciences, Zhengding and Lincheng. The results showed that with the addition of manganese sulphate, soaking and basal application, the upper biomass increased by 15.3% and 8.6% respectively compared with the control % And 14.0% respectively. The average yields per mu were 34.1 kg, 30.3 kg and 30.2 kg respectively, with yields of 7.9%, 6.8% and 6.5% respectively. Manganese sulfate dressing method is simple and easy to cast