大渡河上游天然岷江柏木移植试验及种质资源保存

为寻找岷江柏木最佳的种质资源保存方式,以马尔康市天然起源岷江柏木为对象,从岷江柏木移植试验入手,结合已有的岷江柏木种质资源保存方法,进行了两方面研究:1)探讨了不同移植时间、不同树龄、不同修枝比例对岷江柏木移植的影响。试验共移植216株个体,1 a后成活8株,成活率3.70%。主根发达、须根偏少,土壤贫瘠且砾石含量多,移植施工的直接伤害、移植地环境难以完全相似等因素,直接影响到岷江柏木移植的成活率。2)比较了原地保护、异地移植、采种育苗、存入种质资源库等岷江柏木种质资源保护方式。提出在原地保存不可行的情况下,应优先采取采种育苗,结合入库保存等方式保护岷江柏木种质资源。

Transplant Experiments and Germplasm Conservation of Natural Cupressus chengiana in the Upper Reaches of the Dadu River

In order to find out the best way to preserve the genetic diversity of Cupressus chengiana, transplantation experiments were carried out together with reports on germplasm resource preservation methods in Maerkang city in two aspects. The first experiment was to study effects of different transplanting time, tree age and pruning ratio on the transplanting. A total of 216 individuals were transplanted and 8 survived, with a survival rate of 3.70%. It was concluded that factors might directly affect the transplantation survival rate, such as developed main roots, less fibrous roots, poor soil and high gravel content, direct injury of transplantation implementation and incomplete similarity of transplantation environment. 2) The second experiment was to compare methods of in-situ conservation, ex-situ transplantation, seed collection and seedling raising, and storage in germplasm resource bank. It should be protected by establishing seed orchards, collecting seeds, raising seedlings, storing in storage, when in-situ conservation was not feasible.