三原县西阳公社五联大队第一生产队科研组试验:拔节孕穗期,根外喷施5％的尿素水溶液,可以促进高梁抽穗开花。去年七月中旬,他们发现本队有十三亩夏播高粱“晋杂五号”制种田花期不遇,父、母本叶片数相等,均为七至八片。便立即给母本生长锥喷施5％的素尿水溶液,每亩用量为100 Sanyuan County Xiyang commune team of the first production team of five research team test: jointing booting stage, the root spraying 5% urea solution can promote the flowering of sorghum heading. In mid-July of last year, they found that the team had 13 acres of summer sowing sorghum “Jin hybrid No. 5” farming flowering not fat, the father, the mother leaves the same number of leaves, are seven to eight. Immediately to the female parent cone spraying 5% solution of urea solution, the amount of 100 acres per mu