木麻黄地理种源的苗期试验

试验结果表明，木麻黄原苗木生长与根幅、侧根数量、根瘤重量呈正相关，其中以后两者对苗木生长影响较大，种源间的苗高、地径生长差异经方差分析达显著水平，苗期以细枝木麻黄生长较好，木麻黄生长较差，抗青枯病以粗枝木麻黄最强，木麻黄最差。具有速生抗病性能的种源：广泛地区有E2、E3、E9、E15、E19、E30、E35、E48等种源；广东省湛江地区有E7、E11、E21、E29、E47、E48、等种源；海南省有E2、E3、E5、E7、E10、E29等种源，其中以E2、E3、E9、E29和48种源的适应性较广泛。

SEEDLING STAGE EXPERIMENT ON PROVENANCES OF CASUARINA

The results from the experiment showed that the seedling growth is proportional to its root range, number of laterel-roots and nodule weight, especially the latter two. The differences in height and ground-diameter of seedlings among provenances are of significant level. In seedling stage, C. cunninghamiana grows well whereas C. equisetifolia grows poorly in resistance to bacterial wilt C. glauca is the strongest, while C. equisetifolia the weakest. The seed sources with better quality of fast-growing and disease-resistant are as follows: the E2, E3, E9, E15, E,,, E30, E34, and E48, in Guangzhou Region; the E7, E11, E21, E29, E47, and E48, in Zhan Jiang Region of Guangdong Province; the E2, E3, E5, E7, E10 and E29 in Hainan Province, among them, the E2, E3, E8, E28, and E48 are of wider adaptabilities.