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1978年,我们用磷酸二氢钾浸向日葵种子,增产效果显著.1979年继续进行试验,结果是:200倍液的比对照增产18.8%,250倍液增产16%,300倍液增产14%.浸种方法:先将1斤磷酸二氢钾晶体块(大连新光化工厂生产含,P_2O_5 50%、K_2O30%),放入少量温水(30～40℃)中,搅拌,使其溶解,然后倒入装有200斤清水的大缸或大锅里,再搅拌均匀.此时将选好的向日葵籽倒入配好的溶液中,溶液没过种子2寸为宜,每隔40～50分钟搅拌1次.12～14小时后捞出晾干,即可播种.这是一项花钱少(每亩仅用2～3分钱)、收效大(每亩可增产20多斤葵花籽)、简便易行的增产措施,值得推广.
In 1978, we dipped sunflower seeds with potassium dihydrogen phosphate, and the yield was significantly improved. In 1979, the trial was continued. The results showed that the yield of 200 times liquid was 18.8% higher than that of the control, the yield of 250 times was 16%, and that of 300 times was 14%. Soaking method: First, 1 kg of potassium dihydrogen phosphate crystal block (Dalian Xinguang Chemical Plant containing P2O5 50%, K2O2O%), into a small amount of warm water (30 ~ 40 ℃), stirring, to dissolve, Equipped with 200 jins of clear water or large pot, and then stir evenly.At this time the sunflower seeds selected will be poured into a good solution, the solution has not been seed 2 inch is appropriate, stirring every 40 to 50 minutes 1 12 ~ 14 hours after the fish out to dry, you can sow .This is a less expensive (only 2 to 3 cents per acre), large-yield (yield of 20 kg per acre sunflower seeds), simple Easy to increase production measures, it is worth promoting.