寒地优质梨─—东宁五号大梨宋钟伍（黑龙江省农科院牡丹江农科所１５７０４１）黑龙江省东宁县果树示范场，于１９７９年秋将苹果梨接穗离地６０厘米左右高接于小香水抗寒砧上。结果后发现有５株大果变异单株。至１９９４年（已结果７－８年），５株树上所结果实，性状稳... High-quality pear in cold winter - Dongning Big Pear Song Zhongwu (Heilongjiang Academy of Agricultural Sciences Mudanjiang Agricultural 157041) Dongning County, Heilongjiang Province fruit tree demonstration field, in the autumn of 1979 the apple pear scion 60 cm above the ground from the small perfume Cold anvil on. The results found that there are 5 strains of large fruit mutation. By 1994 (7-8 years old), the results of 5 trees proved stable.