在苗圃育苗,采取切根的方法可以促进苗木生长健壮,并能均衡生长,提高苗木质量。切根的好处约有以下几点:1.切断主根,促进侧须根发达;加强吸水及吸壮养分的能力提高了成活率和生长量.2.切断过长的主根,苗木移栽或定植时,避免根部卷曲的毛病,有助于以后林木的生长和质量。3.切根可以代替移植,节约土地、劳力,工作效率高,易于掌握。根据不同的目的和不同的树种,苗木切根主要应用在以下几方面:一、培育胡桃、橡树、果树以及其它深根性苗木,在播种当年的春季,采取切根措施促进侧须根发达,提高苗木生长.胡桃一般在出苗后10天至半月间进行;橡树当幼苗生长2—3片小叶时即行切根。果树则在幼苗生长10公分时切根。切根的深度以10—15公分较为适宜。春季一般多干旱,切根应选择阴雨天、土壤湿润时进行;或者在切根后随着灌足水。胡桃苗应尽 In nursery nursery, take the method of cutting can promote the robust growth of nursery stock, and can be a balanced growth, improve nursery stock quality. Cutting the root of the benefits of the following points: 1. Cut off the main root, to promote the development of lateral fibrous roots; strengthen the ability to absorb water and absorb nutrients to improve the survival rate and growth .2 cut off the long roots, seedlings transplanted or colonized , To avoid the root curl problems, contribute to the future growth and quality of trees. 3. Cut roots can replace transplantation, save land, labor, work efficiency, easy to grasp. According to different purposes and different tree species, cutting seedlings are mainly used in the following aspects: First, cultivate walnuts, oaks, fruit trees and other deep-rooted seedlings in the spring of planting that year, take root-cutting measures to promote the development of lateral fibrous roots, Growth. Walnuts generally 10 days after emergence to half a month; oak when the seedlings grow 2-3 leaflets when the line cutting. Fruit trees are cut when the seedlings grow 10 cm. Cut the root depth to 10-15 cm is more appropriate. Generally more drought in spring, cut roots should be selected rainy days, when the soil is wet; or after filling with enough water. Walnut seedlings should be done