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1987年采用山西省腐植酸实验工厂生产的腐植酸复合肥,在山西省定襄和清徐两县的西瓜园进行了试验,1988年调整了腐肥三要素比例,并加入微量元素,使其更适于西瓜的营养需要(简称专用腐肥),继续试验。两年均设4种不同施用量处理,并以不施腐肥为对照。试验表明:(1)施用腐植酸复合肥
In 1987, the humic acid compound fertilizer produced by the humic acid experimental plant in Shanxi Province was tested in the watermelon garden of Dingxiang and Qingxu counties in Shanxi Province. In 1988, the proportion of three elements in the fertilizer was adjusted and trace elements were added to make it More suitable for the nutritional needs of watermelon (referred to as dedicated rotifer), continue the test. Four different application rates were set up in two years, and no fertilizer was used as control. Tests show that: (1) the application of humic acid compound fertilizer