乐东拟单性木兰母树林营建技术研究

Study on establishment and management techniques of mother stand for Parakmeria lotungensis

利用松溪、建瓯、沙县、邵武、永安等地的优良林分中母树种子苗,在福建省松溪国有林场建立了7 hm2乐东拟单性木兰母树林,以期解决短期乐东拟单性木兰种子供应不足问题。从母树林选址、营建材料、营建方法等方面探讨了乐东拟单性木兰母树林的营建技术。结果表明,采用沙藏催芽,营养砖营养袋播种技术培育优质乐东拟单性木兰苗木,再选用超级苗造林可使保存率达到90%以上;3年生乐东拟单性木兰专建型母树林树高平均值为2.24 m,变异系数为23.89%,表明母树林中存在较大的生长差异性,有必要对病虫害植株、生长不良植株进行疏伐,从而提高整体生长水平。

The Parakmeria lotungensis mother stand coveting an area of 7 hm^2 was established on Songxi National Forest Farm of Fujian Province, using the superior seedlings bred by seeds from superior stand of Songxi, Jian＇ ou, Shaxian, Shaowu, Yong＇ an. It aims to solve the shortage supplies problem of P. lotungensis. The technique was studied to comply with the aspects of location selection, establishment materials and establishment ways. The results indicated the survival rate could reach 90 % on the condition as below： seeds were stored in sands for germination, using technique of seedling nursed in bags and using superior seedlings; the average tree height was 2.24 m, the coefficient of variation was 23.89 % when the trees were 3 years old. This showed that there were significant differences among mother trees in growth character, and it was necessary to cut down unhealthy trees. Thus, the growth level Would be promoted.