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５类型实生砧对苹果品种冻死率的影响山东省聊城地区，１９９３年１１月１１—１６日，连续阴雨，日均气温为１０—１５．４℃，１１月１７—２１日，连降大雪，气温骤降，到２１日日均气温降至－１７℃左右，使苗圃内一些类型实生砧嫁接的接穗品种遭受冻害。１９９４年４...
5 types of real anvils on the apple frozen mortality rate Liaocheng, Shandong Province, November 11, 1993 November, continuous rainy weather, the average daily temperature of 10 - 15. 4 ℃, November 17-21, heavy snowfall , The temperature plunged and the average daily temperature dropped to about -17 ° C on the 21st, causing frost damage to the scion varieties grafted on some types of rootstocks in the nursery. 1994 4 ...