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1982春,在都匀县栗木公社瓮朗大队的有全州代表性的黄泥土上,进行玉米施锌肥试验。采用大田与盆栽试验相结合,大田试验以龙塘生产队6户农科户为主,施锌肥面积9.3亩,对照4.55亩。供试土壤的pH5.76,有机质3.37％,全氮0.2076％,速效磷12ppm,速效钾106ppm。对照每亩施火土灰1200斤,钙镁磷肥100斤作底肥,苗期追施碳铵两次,每次每亩25斤。处理每亩3斤硫酸锌加6斤火土灰拌种,其余同对照。4月15日播种,供试品种为本地大马牙包谷,植距3×3尺,每窝留两株,行间套黄豆。于
In the spring of 1982, a zinc fertilizer experiment on maize was conducted on the yellow soil soil of the prefectural state in the Urumqi Brigade of Chek Commune, Duyun County. Using field and pot experiments, field trials to Longtang production team 6 households mainly agricultural, zinc fertilizer area of 9.3 acres, 4.55 acres of contrast. The tested soil pH5.76, organic matter 3.37%, total nitrogen 0.2076%, available phosphorus 12ppm, available potassium 106ppm. Control soil per acre ash 1200 kg, 100 kg of magnesium magnesium phosphate fertilizer, seedling topdressing ammonium bicarbonate twice a kilogram per acre. Treating 3 kg of zinc sulfate per acre plus 6 pounds of fire ash seed dressing, the rest with the control. April 15 sowing, the test varieties for the local tooth Valley Valley, planting 3 × 3 feet, leaving two per litter, intercropping soybeans. in