幼龄果园存在的主要问题及改进宋德禄一、小老树问题．苗木栽植２—３年后，树体发育迟缓，植株矮小，进入结果年限拖后。，小老树是栽培管理不当造成的；栽植过深，埋土超过根颈部；土壤肥力不足，枝条生长缓慢，抑制了树冠扩大；地下害虫及早期落叶病危害。改进建议：对... The main problems existing in young orchards and their improvement Song Delu First, the problem of small old trees. Seedlings planted 2-3 years later, the tree growth retardation, plant dwarf, into the results of time delay. , Small old tree is caused by improper cultivation and management; planted too deep, buried more than the root neck; lack of soil fertility, branches grow slowly, inhibiting the crown to expand; underground pests and early leaf decay hazards. Suggestions for improvement: to ...