香樟耐寒性试验研究

目的]为香樟在豫中北部城市的引种提供依据。方法]分别驻马店市区和郊外栽植香樟,比较香樟的生长情况,观察香樟的耐寒性。结果]香樟在市区与在郊外相比不易遭受冻害。香樟嫩枝易受低温冻害,根部则不受冻害。树龄相近的香樟,耐寒耐冻的能力个体差异很小;树龄差别大的香樟,耐寒耐冻的能力差别较大;树龄越大越不易遭受冻害。在最低气温低于-10℃时,野外幼树的枝干很容易遭受冻害,但截去冻死的枝干后可继续发芽,长成大树。在略低于-10℃时,野外大香樟树可能不遭受冻害或仅嫩枝嫩叶遭受轻度冻害。结论]在驻马店以北的城市市区内可引种香樟,但野外和市区内的小香樟冬季需要采取防寒措施,以免发生冻害。

Experimental Study on the Cold Tolerance of Cinnamomum camphora L.

The aim of the research was to provide basis for the introduction of Cinnamomum camphora L.in middle and northern cities.C.camphora was planted in urban areas and suburb respectively to compare the growth status of C.camphora and observe its cold tolerance.Compared with planting in the suburb,C.camphora plated in the urban areas was not easy to suffer freezing damage.Tender branches of C.camphora were easy to suffer low-temperature freezing damage,but the roots didn't suffer freezing damage.For C.camphora with close tree-age,their individual differences of cold tolerance were little.And for C.camphora with great difference of tree age,their individual differences of cold tolerance were larger.The elder the tree age was,the more hardly they suffered freezing damage.When the minimum temperature was lower than-10 ℃,the limbs of field young trees were very easy to suffer freezing damage,but they could continue to germinate and grew into big trees after the frozen limbs were cut.When the temperature was slightly lower than-10 ℃,big trees of C.camphora grown in field might not suffer freezing damage or only their tender branches and leaves suffered slight freezing damage.C.camphora can be introduced in the urban areas of Zhumadian.And small trees of C.camphora in the field and urban areas demand to take cold-proof measures and avoid the occurrence of freezing damage.