绿化大树冬季移植成活率的调查与分析

以近几年长春市典型绿化工程项目为对象,对冬季大树移植成活率进行调查与分析,结果表明:不同移植时间成活率差异明显,最适宜时间为2月中旬至4月中旬,成活率可达到85%;长时间风吹日晒、土壤透风导致树体水分失衡,以及树龄大不易再生新根而影响吸收功能,是导致北方干寒地区冬季大树移植成活率不高的主要因素。维持树体水分平衡、适当修剪树冠、清除土坨稻草绳包装、根系切口喷施生长素可有效提高成活率。

Investigation and analysis on the survival rate of greening trees transplanted in winter

The survival rate of greening trees transplanted in winter were investigated and analyzed for the greening model projects in Changchun in recent years.Results showed that the survival rates were significantly different among trees transplanted at various time.Period from middle February to April was the optimal transplanting time,with 85% survival rate.The main factors resulting in low survival rate for trees transplanted in winter in north area included long term exposure in wind and sunshine,unbalance water of tree resulted by ventilating soil layers,and negative effect on absorption as new roots grew difficultly for old trees.To maintain water balance,suitable crown cutting,cleaning stray rope package,and spaying growth hormone on roots could improve the survival rate.