据研究,化肥表施一般利用率不高,氮肥只利用30-50％,磷肥当季利用不过25％,钾肥利用30-60％,就是说,有一半以上被浪费掉。为了解决这个问题,几年来我们通过总结群众对水稻“捻头”、“塞蔸”的经验,初步摸索出球肥深施,提高化肥利用率的办法,收到明显的增产效果。据1973年38个点对比试验,球肥深施增产5％以下的占13.2％,增产5-10％的占31.6％,增产10-20％的占44.7％,增产20％的占10.5％。球肥深施的推广情况几年来的试验证明,把化肥制成球肥深施,可以提高肥效20-30％。1973年全省推广9万多亩,一般增产1-2成。据我省38个点的统计,平均每亩多收稻谷86斤,增产14.8％。等量碳酸氢铵深施,肥效显著优于等量硫酸铵表施。氮、磷、钾化肥做成球肥深施,都比表施提高肥效。永定县坎市公社水稻栽插面积 According to the study, the general utilization rate of fertilizer tables is not high, only 30-50% of nitrogen fertilizer is used, 25% of phosphate fertilizer is used during the season, and 30-60% of potassium fertilizer is used, that is, more than half is wasted. In order to solve this problem, in the past few years, we summed up the people’s experience of “turning the head” and “plugging the rice” to find out the way to improve the fertilization efficiency by using deep application of fertilizer. According to the comparative test of 38 points in 1973, 13.2% accounted for 5% or less of deep-seeding fertilizer, 31.6% increased 5-10%, 44.7% increased 10-20% and 10.5% increased 20%. The application of fertilizer deep application of the test over the years proved that the fertilizer made of fertilizer deep application, can increase fertilizer efficiency 20-30%. In 1973 the province to promote more than 90,000 mu, the general increase of 1-2 percent. According to the statistical data of 38 points in our province, the average yield per acre was 86 kg, an increase of 14.8%. The same amount of ammonium bicarbonate deep application, the fertilizer effect is significantly better than the same amount of ammonium sulfate. Nitrogen, phosphorus and potassium fertilizers made into fertilizer deep application, than to improve fertilizer efficiency. Yongding County Kan commune rice planted area