谷子化控免(少)间苗技术研究

从30余种药剂中筛选出PC和YB效果较好,并进一步研究了这2种药剂的最佳处理方法、处理剂量和制剂处理谷种与正常谷种的最佳混播比例。结果表明,谷种经PC(大于5%倍液)和YB(10%倍液)2种药剂拌种处理,再以正常谷种占总播量的35%～40%播种,既能正常发芽出苗、发挥群体顶土出苗的作用,又能在出苗后自行死亡,实现谷田免(少)间苗目的。该技术对播期没有特殊要求,在春谷上也同样适用。

Agent Screening and Methodology Research on Chemicals for Avoiding Seedling Thinning in Foxtail Millet

Seedling thinning was necessary in foxtail millet cultivation which was labor and time consuming.In this report we have screened more than 30 kinds of different chemicals to select that suitable for seedling thinning so as to avoid labor consumption.Two chemicals, PC and YB were selected for the purpose.The methodology on how to use these chemicals was also carried out on treatment, agent dosage and the proper ratio of treated and non-treated seed.The results shows that seed treated with 20 times of PC (agent concentration >5%), or treated with 25 times of YB (agent concentration>10%), mixed with 35%~40% non-treated normal seed could reach our purpose of avoiding seedling thinning but still keep normal seedling emergency.This method could be used both in summer millet and spring millet because it is not sowing time dependent.