为使制种高粱花期相遇,除用错期播种、巧留苗、偏肥偏水,人工授粉使大部地块同时进入花期外,去年我们还对42亩花期不够相遇的地块,采取了铲根和剥穗两项措施。这样,使全场所有制种高粱都结实产种。制种高粱是“晋杂5号”,于5月26日前后进行麦垅套播,9月底全部成熟。为什么会造成部分地块花期不遇呢?据我们调查分析,有两个原因:一是父本生长势强,母本生长势弱(见下表);二是因一些地块地势低洼,遭受了水害成了下湿地,使母本的生长条件变得更差,其生长自然就更缓慢了。为了解决这个矛盾,我们对父本采取断根抑制生长,而对母本采取剥出幼穗促使早开花的办法,收到良好效果。 In order to meet the flowering date of sorghum seed production, in addition to the wrong seeding, Qiaoliu Miao, partial fertilizer partial water, artificial pollination so that most plots into the flowering at the same time last year, we also 42 acres of land not enough time to encounter plots, taken Shovel and stripping two measures. In this way, all the species of sorghum produced in the entire field are sturdy. Seed production of sorghum is “Jin hybrid No. 5”, on May 26 before and after the wheat sowing broadcast, by the end of September all mature. Why do some of the plots caused by flowering does not happen? According to our survey and analysis, there are two reasons: First, strong growth of the male parent, weak growth of the female parent (see table below); Second, because of some low-lying plots, suffered Water damage has become a wetland, so that the growth of maternal conditions become worse, its growth is more slowly. In order to resolve this contradiction, we took a root-ancestor inhibition of the growth of the male parent, and we took good results when we adopted the method of peeling the young ear to promote early flowering.