林龄40年以上的云杉大苗移植再生能力较弱,为保证其成活,对移植云杉大苗的养护与管理就尤其重要。随着城镇建设品位的不断提高,城镇绿化美化规模与档次也随之提高,需要在较短的时间内体现绿化、美化效果,因 Spruce seedlings aged more than 40 years have less regenerative capacity for replanting, and in order to ensure their survival, the conservation and management of spruce seedlings are especially important. With the continuous improvement of the grade of urban construction, the scale and grade of urban greening and beautification will also increase, and the greening and beautifying effects need to be reflected in a relatively short period of time due to