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为了探讨丰产素在梨树上的应用价值及其使用技术,河北省栾城县农业局、科委于1990～1991年对其使用浓度、喷洒次数及适宜时期,进行了研究。所用丰产素(1.4％复硝钠)为广州温泉化工厂产品。试验设在栾城县农科所果园,品种为15年生雪花梨,设不同浓度和不同喷药次数两组。第一组不同浓度有4000、5000、6000、7000倍液,于落花后开始,幼果期和果实
In order to investigate the application value and technology of high yield of pear in pear, Luancheng County Agriculture Bureau and Science and Technology Commission of Hebei Province studied the concentration, spraying frequency and suitable period from 1990 to 1991. The use of high yield of prime (1.4% sodium nitrate) for the Guangzhou Spa chemical products. Test set in Luancheng County Agricultural Orchard, a species of 15-year-old snow pear, set different concentrations and different spraying two groups. The first group of different concentrations of 4000,5000,6000,7000 times, after the beginning of falling, young fruit and fruit