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对于花朵已经遭受冻害的梨园,可以采取以下3种方法加以补救,以挽回产量损失:(一)搞好人工授粉,以提高座果率。(二)受冻梨花在花托尚好的情况下,喷布50～100ppm 赤霉素(GA_4+7),能够挽回产量。这种方法对西洋梨的效果更好。(三)加强肥水管理,促进果实生长。通过增加单果重,提高果品等级率,挽回霜冻损失。据莱阳农学院观察,梨果的体积增长,大体上可分作3个时期:即第一速生期、缓慢生长期,和第二速生期。第一速生期相当于种子的胚乳发育期。果实生长,主要是果肉细胞分裂、数量增多。缓慢生长期相当于种子的胚发育期,果实增长缓慢,主要进行各种组
Pear orchards for which flowers have been subjected to frost damage can be remedied in the following three ways in order to restore the loss of production: (a) do a good job of artificial pollination, in order to improve the rate of fruit set. (B) Frost pear flowers in the torch is still good circumstances, spraying 50 ~ 100ppm GA (GA_4 +7), to restore the yield. This method is better for pear. (C) to strengthen fertilizer and water management, promote fruit growth. Increase frost loss by increasing fruit weight, increasing fruit grade. According to Laiyang Agricultural College observation, the volume growth of pear, in general, can be divided into three periods: the first fast-growing period, the slow growth period, and the second fast-growing period. The first fast-growing period is equivalent to the seed’s endosperm development. Fruit growth, mainly flesh cell division, an increase in the number. The slow growth period is equivalent to the seed embryo development, the slow growth of fruit, mainly for various groups