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1973年我们作了高粱喷施磷酸二氢钾试验。试验内容:①高粱拔节期喷一次.每亩用药1斤.配成400倍液喷施。②高粱拔节和孕穗期各喷一次(用量用法同上)。试验结果:高粱喷两次磷酸二氢钾.穗大粒饱,亩产653斤,比不喷的亩产593斤增产10.1%。喷一次的增产不显著。磷酸二氢钾是一种便于根外喷施的高效磷钾复合肥料.在高粱拔节、孕穗期根外喷施两次磷酸二氢钾,增产较为显著.
In 1973, we made sorghum spraying potassium dihydrogen phosphate test. Test content: ① sorghum jointing spray once per acre medication 1 kg dubbed 400 times spraying. ② sorghum jointing and booting each spraying (dosage usage Ibid). Test results: Sorghum sprayed twice potassium dihydrogen phosphate, spike large grain, 653 kg per mu, 593 kg more than the non-sprayed mu produce increased 10.1%. Spray once the increase is not significant. Potassium dihydrogen phosphate is a kind of efficient P and K compound fertilizer which can be sprayed on the outside of the root exudates.It is obvious that the potassium dihydrogen phosphate is sprayed twice outside the root of the sorghum at jointing and booting stages.