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近年来,我市进行了多种微肥试验。1989年重点研究了硼、钼、锌肥对棉花的增产效果及其配合施用的综合效应。试验在本市四县五乡进行。土壤有效锌、硼、钼含量均在临值界之下。试验设:(1)对照;(2)锌,亩基施硫酸锌1.5公斤;(3)钼,分
In recent years, the city conducted a variety of fertilizer experiments. In 1989, the effects of boron, molybdenum and zinc fertilizers on the yield increase of cotton and their combined effects were studied. The experiment is carried out in four counties and five townships in this city. Soil available zinc, boron, molybdenum content are below the critical value. Experimental setup: (1) control; (2) zinc, 1.5 kg of zinc sulfate base foundation; (3) molybdenum, points