湿地松加勒比松杂交组合引种试验研究

通过对湿地松、加勒比松杂交组合引种试验研究表明:在生长性状树高、胸径、材积、侧枝总数方面,杂交组合普遍好于对照;在生长性状冠幅方面大部分杂交组合种好于湿地松无性系种子园混合种、加勒比松无性系种子园混合种,少部分比当地马尾松好;在生长性状方面杂交组合间和杂交组合内存在差异。主要生长性状树高、胸径、材积存在极显著相关,因此间接选择也是有效的。在抗寒性方面,加勒比松无性系自由授粉子代、加勒比松无性系种子园混合种CK2抗寒性最差,湿地松无性系种子园混合种抗寒能力较强,没有受冻,加勒比松无性系种子园混合种CK3、当地马尾松、杂交组合种较抗寒且抗寒性相近;在抗虫(松梢螟)性方面无显著差异。

Introduction Experiment of the Hybridization Combination of Pinus elliottii and P.caribaea

The introduction experiment research of the hybridization combination of Pinus elliottii and P.caribaea showed that from the respects of growth characters of height,dbh,volume,and total lateral branch anount,the hybridization combination was generally better than the control;from the respect of growth character of crown width,most hybridization combination species were better than Pinus elliottii clonal seed orchard mixed species,and P.caribaea clonal seed orchard mixed species,less hybridization combination species were better than the local Pinus massoniana;from the respects of growth characters,the differences existed among the hybridization combinations,and inside the combinations.The extremely evident correlations existed among the main growth characters of height,dbh,volume,so,the indirect selection was also effective.From the respects of the cold-resistant capacities,P.caribaea clonal open pollination progeny,and P.caribaea clonal seed orchard mixed species CK2 were worst,Pinus elliottii clonal seed orchard mixed species were relatively strong,and weren't frozen,P.caribaea clonal seed orchard mixed species CK3,local Pinus massoniana,and hybridization combination species had the relatively high cold-resistant capacities,which were close,there weren't evident difference from the respects of insect(Dioryctria splendidella)-resistant capacities.