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大垄清种玉米面积逐年扩大,急需解决适宜栽培密度问题,为此,我们作了一些调查研究和试验。 一、不同行距的适宜密度 1978年铁岭县阿吉公社推广站在平肥地上,中等施肥和管理条件下试验,2.1尺大垄丹玉6号玉米,以8寸株距产量最高(每亩3,571株),亩产1,119.1斤,比7寸、9寸、1尺株距分别增产2.6％、11.5％、39.3％;催阵堡公社推广站试验,2尺大垄,以8.5寸株距(每亩3,541株)产量最高;1980年汎河公社推广站也进行了2尺行距大垄密度试验,由于施肥水平、管理水平较高,株距8寸(每亩保苗3,750株)产量最高,亩产1,348.2斤,比9寸、7寸株距分别增产2.6％、8.7％。
Large ridge clearance of maize area expanded year by year, the urgent need to solve the problem of suitable planting density, for which we made some investigations and experiments. First, the appropriate density of different row spacing 1978 Tiegu County Agji commune promotion station in the flat fertilizer on the ground, the middle fertilization and management conditions, 2.1-foot big ridge Dan Yu 6 maize to 8-inch spacing from the highest yield (3,571 strains per mu ), Yielding 1,119.1 kg per mu, an increase of 2.6%, 11.5% and 39.3% respectively over the 7-inch, 9-inch and 1-meter intervals; ) Produced the highest yield. In 1980, the Panhe Commune Extension Station also conducted a 2-foot run of large ridge density test. Due to the high fertilization level and high management level, the yield was 8-inch (3,750 seedlings per acre) with the highest yield of 1,348.2 kg per mu 9-inch, 7-inch spacing increased 2.6%, 8.7% respectively.