云南省地处热带和亚热带季风区,红、黄壤等中低产田地占全省四千万亩耕地的一半以上,常表现为酸、干、瘦、板、有机质缺乏,有效养分含量低,土壤结构不良,保水保肥能力差,作物产量一般较低,严重阻碍着我省农业生产的发展。腐植酸类肥料是以腐植酸含量较多的泥炭、褐煤、风化煤为主要原料,加入一定的 Yunnan Province is located in the tropical and subtropical monsoon regions. Middle and low yield fields such as red and yellow soil account for more than half of the 40 million mu of cultivated land in the province, often showing acid, dry, thin, organic matter deficiencies, low available nutrients and soil structure Bad, poor water retention and fertility, crop yield is generally low, seriously hindered the development of agricultural production in our province. Humic acid fertilizer is a humic acid content of peat, lignite, weathered coal as the main raw material, adding a certain amount of