论文部分内容阅读
彭阳林业站1980年秋引进山楂苗,1983年已有7株开花结果,当年新梢生长最长达1.7米。三年来尚未发现有冻害。1983年又引进山楂嫁接苗1012株,成苗619株,成苗率达61.2%。当地的物候期,初花在5月下旬,花期一个月。果实在10月上旬成熟。果实平均纵径2.4厘米,横径为2.3厘米,平均单果重6.5克。山楂适应性广,抗逆性强,能耐零下40℃左右的低温,而固原山区冬季历年极端最低
Peng Yang Forestry Station in the autumn of 1980 to introduce hawthorn seedlings, 1983 has been the 7 flowering results, when the growth of new shoots up to 1.7 meters. No frost damage has been found in three years. In 1983, it introduced 1012 hawthorn grafted seedlings, 619 seedlings, seedling rate of 61.2%. The local phenology, early flowers in late May, flowering month. The fruit ripened in early October. Average fruit length 2.4 cm, horizontal diameter of 2.3 cm, the average weight 6.5 grams. Hawthorn has wide adaptability, strong resistance, can withstand low temperatures around minus 40 ℃, while Guyuan mountain area is extremely low in the calendar year