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唐山地区大樱桃发展较快,栽培面积逐年扩大。但因冬季出现气候异常,普遍发生裂干抽条现象。以1999年冬为例:最高气温出现在12月下旬,气温达9℃,最低气温出现在1月下旬,气温达-18℃。由于高低温交错出现,并且持续时间较长,导致枝干细胞活动受冻破裂死亡。特别严重的是主干阳面皮层冻裂失水,使主、侧枝抽条。据2000年春冻害调查:主干出现冻裂的占20.5％,幼树抽条的占30％,6～7年生大树死亡占2％。为避免冬季出现冻害,现把一些预防措施介绍如下: 1 培养健壮树体 在施好有机肥的基础上,秋季避免大水大肥
The rapid development of large cherry in Tangshan, cultivation area expanded year by year. However, due to abnormal weather in winter, the occurrence of split-slit phenomenon. Take the winter of 1999 as an example: the highest temperature appeared in late December, the temperature reached 9 ℃, the lowest temperature appeared in late January, the temperature reached -18 ℃. Due to staggered high and low temperatures, and for a long time, leading to stem cell activity by the collapse of frozen death. Particularly serious is the main trunk cortical water loss, so that the main, collateral stripping. According to the 2000 spring frost damage survey, 20.5% of main frost cracks, 30% of saplings, and 6-7 years old trees account for 2% of deaths. In order to avoid frost damage in winter, now some precautionary measures are introduced as follows: 1 to cultivate a robust tree in the application of organic fertilizer on the basis of the fall to avoid large water and fertilizer