论文部分内容阅读
平日里没少为我的几盆花操心,浇水、除草、剪枝……还要调配各种“营养液”。买回来一些粉剂、液剂,说明上总用到ppm,不知为何物。四处查书,才知道是一种浓度表示法,即百万分之多少,1ppm=1mp/kg(即1豪克药剂加水1千克),100ppm=100mp/kg,依此类推。好容易搞清楚,烦恼又上心头。到哪去找能称几豪克的天平呢?每回溶解生根粉,
Weekdays no less for my few flowers care, watering, weeding, pruning ... ... but also deployment of various “nutrition liquid.” Buy some powder, liquid, explain the total use of ppm, I do not know why. A thorough investigation, we know that is a concentration representation, that is, the number of parts per million, 1ppm = 1mp / kg (that is, 1 Hauk Pharmacy 1kg water), 100ppm = 100mp / kg, and so on. So easy to figure out, worry again in my heart. Where to find a few grams of grams can weigh it? Each dissolve rooting powder,