近年来,黄河故道地区苹果生产发展较快,对苹果苗木的需求量不断增加,特别是一些苹果发展新区,所需苗木全部从外地调运。这样不但增加了苗木成本和群众的经济负担;而且存长途运输过程中,使苗木冈失水、受冻而受损,降低了苗木质量和栽植成 In recent years, the apple production in the old course of the Yellow River has been developing rapidly, and the demand for apple seedlings has been on the rise. In particular, some apple-growing new areas require all the seedlings to be transported from other places. This will not only increase the cost of nursery stock and the economic burden on the masses; but also save the long-distance transport process, the seedlings Gang water loss, damage by freezing, reducing seedling quality and planting into