目前我国农药浓度大部分用百分比浓度表示其含量,但在使用时有时必须换算成百万分之一浓度,特别对植物生长调节剂的使用更是如此。而多数生产者在换算时又感困难,为解决这一困难,只要掌握一式一算即准。公式是:加水公斤数=1000×用农药克数×农药百分比/所需要的ppm数上式“1000”是个常数,一般情况下1毫升相 At present, most of pesticide concentration in our country is expressed as percentage concentration, but sometimes it must be converted into one millionth of concentration when used, especially for plant growth regulators. Most producers, however, find it hard to convert. To solve this difficulty, it is only a matter of mastery. The formula is: kg of water = 1000 × grams of pesticides × pesticides% / ppm required The formula “1000” is a constant, under normal circumstances 1 ml phase