华中地区黑壳楠越冬成活状况研究

Research on the Overwintering Survival of Lindera megaphylla in Central China

黑壳楠作为园林绿化的重要树种,对其的研究目前主要集中在向北方的引种驯化和种植管理等方面,而对黑壳楠低温胁迫的研究相对较少。该文通过在华中地区孝感市分别对黑壳楠地栽苗和袋苗进行越冬成活试验,试图了解黑壳楠在该类环境中的耐受能力,以期为黑壳楠的越冬管理提供指导。结果表明,在孝感地区11月至次年3月,平均气温为4~12℃的环境下,黑壳楠地栽苗总体成活率接近90%;袋苗成活率达到70%。为了更好提高成活率,地栽苗不适宜进行断根剪枝处理,且适当添加一定比例有机肥可以提高越冬后黑壳楠成活率。

As an important species of afforestation, the research of Lindera megaphylla Hemsl. mainly concentrated in introduction and domestication to the north and planting management etc, while the study of L. megaphylla under the low temperature stress is relatively lack. We did an ovcrwintering survival test on the bag seedings and field grown seedings of L. megaphylla in Xiaogan of Central China, to understand the tolerance ability of L. megaphylla in low temperature environment and provide guidance for the overwintering management of L. megaphylla. Between November to March of the follwing year, our results show that the field grown seedings of L. megaphylla have a overall survival rate of nearly 90% with an average temperature of 4- 12℃. However, the bag seedings have a overall surviv- al rate of only 70% under the same condition.In order to improve the survival rate, the field grown seedings should not be cut the roots and branches.Moreover, adding a certain proportion of organic fertilizer appropriately can en- hance the overwintering survival rate of L. megaphylla.