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本刊1984年第1期刊出玉米品种“七三单交”后,许多读者来信,要求介绍栽培技术。现将主要栽培方法介绍如下: 播种期七三单交属中熟种,需积温2,600—2,800℃,全生育期春播低山区为110—115天;二半山区为115—125天;高寒山区为130—145天,夏播为98—100天。七三单交适宜播期是,低山区为清明节前后,高山区为谷雨节前后。麦田套种,在麦收前20—25天播种为宜。各地掌握土温稳定在12℃以上播种较安全。
After the publication of the “seven or three single cross” maize variety in 1984, many readers wrote a letter requesting the introduction of cultivation techniques. Now the main cultivation methods are described as follows: seventy-three single seeding medium maturity, the need to accumulate temperature 2,600-2,800 ℃, the whole growth period of spring lowland 110-115 days; the second half of the mountain 115-125 days; alpine mountain is 130-145 days, summer broadcast 98-100 days. Seventy-three single cross is suitable for sowing, low mountain area before and after the Ching Ming Festival, high mountain valley before and after the Valley rain. Wheat field intercropping, sowing in the wheat before 20-25 days is appropriate. Soil temperature control around more than 12 ℃ seeding more secure.