白桦与华北落叶松造林的对比试验

在宁夏区六盘山外围引种乡土树种白桦和华北落叶松,与不同的立地条件作对比试验。结果表明,白桦的成活率均在国家造林标准要求的85%以上,其成活率、保存率、高生长量和地径生长量均比当地主要造林树种华北落叶松大,抗病虫鼠害能力强,与优势树华北落叶松相比,其抗逆性、生理、生态性状均优于华北落叶松。所以引种白桦在六盘山外围土石质山区是可行的,可以推广应用。

Afforestation Experiment on Birch and Huabei Larch

The native species of birch and Huabei larch were introduced in the periphery of Liupanshan mountain in Ningxia Hui Autonomous Region,and were tested contrastively in different site conditions.The results showed that the survival rate of birch was 85%,meet the requirements of national forestation standard,its survival rate,decreasing,high growth and ground diameter growth were higher than the local tree species of Huabei larch,its disease and pest ability was strong,compared to the advantage tree of Huabei ...