磷酸二氢钾系石家庄市化工一厂产品,供医药和化学试剂用。自1969年石家庄市郊槐底大队在农作物上试用成功后,今年在石家庄市郊小麦上推广,结合治锈喷施近8万亩。1969年槐底用500倍液浸玉米种22小时,亩产688斤,比对照增产25%;小麦根外喷施1,000倍溶液,亩产611斤,比对照增产22%;在水稻拔节孕穗 Potassium dihydrogen phosphate, a chemical plant in Shijiazhuang City for pharmaceutical and chemical reagents. Since 1969, Shijiazhuang suburbs Huai base brigade successfully tested on crops, this year in the suburbs of Shijiazhuang wheat promotion, combined with nearly 80000 acres of rust spraying. In 1969, 500 times of sesame seeds were used to soak maize seeds for 22 hours, yielding 688 kg per mu, yielding 25% more than that of the control. Wheat was sprayed 1,000 times with a yield of 611 kg per mu, an increase of 22% over that of the control.