南洋楹1代无性系种子园营建技术研究

Study on the Establishment Technologies for First Generation Clonal Seed Orchard of Paraserianthes falcataria

经过7 a种子园的建设,在广东省电白县建成了5.41 hm2南洋楹1代无性系种子园,通过对南洋楹优树选择、嫁接、建园等无性系种子园营建关键技术的总结,分析了建园效果。结果表明,建园的87个优树无性系,植株平均高2.90 m,平均嫁接口直径6.83 cm,平均冠幅3.97 m,冠幅/嫁接株高为1.68,树体矮化效果明显,树冠呈伞形;园中50.56%植株进入开花结实期,缩短了南洋楹初花期年限,有助于种子园提早结实。

Through 7 years of implementation of seed orchard establishment, the first generation clonal seed or- chard of Paraserianthes falcataria was established in Dianbai County, Guangdong Province, which area was 5.41 hm2. And then summarized some key establishment technology for clonal seed orchard of P. falcataria such as plus tree selection, grafting, establishment. The results showed that there were 87 plus clones in the orchard, and their av- erage height, grafting caliber, crown were 2.90 m,6. 83 cm,3.97 m, respectively. Besides,the crown and height ra- tio was 1.68. In the orchard, the dwarfing effect of plants was obvious and the crown was umbrella-type. 50.56% plants reached the flowering and productive phase stage, which suggested blooming period of P. falcataria was short- en, and orchard seed was promoted earlier.