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近几年山楂发展很快,但是一些地方在山楂育苗和建园时,对土壤的酸碱性重视不够,致使幼苗和定植后的幼树出现严重的黄叶病,严重者全株死亡,给生产造成较大的损失.山楂适宜中性和微酸性土壤,在碱性土壤中叶片白化,边缘部分呈烧焦状.到了雨季,黄叶病更加严重.为了摸清山楂对土壤酸碱性的适应范围,笔者曾在朝阳地区进行取样调查.在山楂的老产区建昌具新开岭乡的成龄山楂园和苗圃调查,树体发育良好,并能正常生长结果的果园土壤pH为6.95—7.19,呈微酸性至中性.发生黄叶病的山
In recent years, hawthorn developed rapidly, but some places in the hawthorn nursery and construction of the park, the acidity and alkalinity of the soil is not enough attention, resulting in seedlings and young saplings after planting serious yellow leaf disease, severe death of the whole plant to Production caused greater losses.Hawthorn suitable for neutral and slightly acidic soil, albino in the leaves of albino soil, burned the edge of the burned-like .In the rainy season, yellow leaf disease is more serious.In order to find out the hawthorn soil acid-base Adaptation, I have conducted a sample survey in Chaoyang.In the crataegus production area Jianchang with a new open ridge township hawthorn garden and nursery survey, the tree body is well developed, and the results of the normal orchard soil pH 6.95 -7.19, slightly acidic to neutral. Occurrence of yellow leaf disease mountain