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苏联在苹果开花的第3和第4天喷用2％的无水碳酸钠水溶液,进行了两年的疏花试验。与不进行处理的对照相比,不仅提高了果实品质,而且增加产量28.7～37％。这些有利的影响在下一年里仍
The Soviet Union sprayed 2% of anhydrous sodium carbonate aqueous solution on the 3rd and 4th flowering days of the apple and conducted two years of thinning test. Compared with untreated controls, not only improved fruit quality, but also increased yield 28.7 ~ 37%. These positive effects will remain for the next year