黑龙江省为我国高粱栽培北限,低温冷害是影响我省高粱稳产高产的主要灾害。为了解决高粱贪青晚熟单产不高总产不稳的问题,我们在总结群众经验的基础上,于1973～1977年,先后在所内与所外基点,开展了“高粱早熟高产栽培技术及其理论的研究”。现将五年来的研究结果总结如下: 一、全苗壮苗构成合理的群体结构 1.适时播种缩短播期: 适时播种缩短播期一次全苗,是秋霜春防的一项战略性措施。所以,必须根据高粱发芽出苗对温湿度的要求,确定适宜播期。 Heilongjiang Province for the northern limit cultivation of sorghum, chilling damage is the main disaster affecting the stable and high yield of sorghum in our province. In order to solve the problem of low yield and high yield of late-ripening sweet-grapes in sorghum, on the basis of summarizing the experiences of the masses, we conducted “High-yielding Sorghum Cultivation Techniques and Its Theory” from 1973 to 1977 Research". The results of the past five years are summarized as follows: First, all seedlings constitute a reasonable population structure Strong seedlings 1. Sowing time to shorten the sowing time: timely sowing to shorten the sowing of a seedling, is a strategic measure spring autumn frost. Therefore, must be based on sorghum germination of the temperature and humidity requirements, to determine the appropriate sowing date.