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磷酸二氢钾是一种高速效磷钾复合化肥,我队从1977年以来,经四年喷施大田示范、三年小区小麦试验,均有明显增产效果。一、试验经过: 小麦喷磷试验,1978、1979年均为三个处理,分喷清水、喷一次和二次;1980年为五个处理,分喷清水、喷一次、二次、三次和四次,以喷清水为统一对照。参试品种为天选15号、天选34号、南召2号、7118、天763。药液浓度均为2％稀释溶液;试验地均为肥力中上的川水地。喷施时间1978年为扬花期始喷,相隔半月喷二次;1979年抽穗期始喷,相隔10天分别喷二次。1980年第一次在抽穗期前4天(4月28日),间隔半月后(5月12日)喷第二次,11天后(5月23日)喷第三次,7天后(5月30日)喷第四次。
Potassium dihydrogen phosphate is a high-efficiency phosphorus and potassium compound fertilizer, our team from 1977, after four years of spraying field demonstration, three years plot of wheat, have significantly increased yield. First, the test after: wheat phosphorus test, 1978 and 1979 are three treatment points, sub-spray water, spray once and twice; 1980 for the five treatment, sub-spray water, spray once, twice, three times and four Times, to spray water as a unified control. Test varieties for the day election on the 15th, the day election on the 34th, South call on the 2nd, 7118, day 763. Liquid concentration of 2% diluted solution; test are fertile in the Chuan Shui. Spraying time in 1978 for the flowering period of the first spray, spraying twice a month; 1979 Heading spray, separated by 10 days were sprayed twice. In 1980 the first time in the first four days of heading (April 28), after a half-moon interval (May 12) the second spray, 11 days (May 23) the third spray, 7 days (May 30th) spray the fourth time.