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本试验是探索棉花合理应用“九二○”的方法,以达到保桃增产的效果,为大面积棉花生产应用“九二○”提供依据。试验田面积九分四厘,供试品种华棉4号,采用互比法排列(共设六个处理一个对照),每小区面积3.5厘,重复三次,宽窄行种植,宽行2.5尺,窄行1尺,株距5寸,每厢4行,密度为每亩6,800株。试验从两方面进行,一是棉花不同开花时期点喷“九二○”效果试验,二是棉花去雄后点喷“九二○”的效果试验,本试验所用“九二○”为工业制品,浓度均为20PPM。
This experiment is to explore the rational use of cotton, “920” approach to achieve the effect of increasing peach yield, for large areas of cotton production and application of “920” to provide the basis. The test plot area of nine points four percent, the test varieties Hua Mian 4, arranged by mutual ratio (a total of six treatment of a control), each plot area of 3.5%, repeated three times, wide and narrow rows of planting, wide row 2.5 feet, narrow row 1 foot, spacing 5 inches, 4 lines per compartment, density of 6,800 plants per acre. The experiment was carried out in two aspects. One was the “920” effect test of point-spraying at different flowering stages of cotton and the second was the effect test of “920” spraying of cotton at the stage of flowering. The “920” used in this experiment was an industrial product , The concentration is 20PPM.