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1991年我们在1.5万公顷小麦上进行了叶喷硫酸铜试验。即于小麦3～4叶期,每公顷用硫酸铜600克,结合化学除草与2,4-滴丁酯混合叶面喷施,取得明显的增产效果。据调查,喷铜肥的小麦穗长比对照增加0.4一0.8厘米,穗粒数增加1.0一1.7个,千粒重增加1.4一1.9克,每公顷增产258.0一316.5千克,增产幅度为5.9%一7.1%。
In 1991, we conducted leaf copper sulfate test on 15,000 hectares of wheat. That is, in wheat 3 to 4 leaf stage, with 600 grams of copper sulfate per hectare, combined with chemical weeding and 2,4-D butylate mixed foliar spray, and achieved significant yield-increasing effect. According to the survey, the spike length of wheat sprinkled with copper fertilizer increased by 0.4 to 0.8 cm compared with the control, the number of spikelets increased by 1.0 to 1.7, the grain weight increased by 1.4 to 1.9 grams, and the yield per hectare increased from 258.0 to 316.5 kg with a yield increase of 5.9% to 7.1% .