非洲桃花心木在德宏地区的引种栽培试验

Introduction Cultivation of Khaya sengalensis in Dehong Region

在德宏州林业科学研究所对引自海南的非洲桃花心木进行种子萌发和播种育苗造林试验。结果表明，非洲桃花心木的种子不耐贮藏，需即采即播，发芽率为68％，播种覆土厚度以1～2cm为宜，适宜德宏热区海拔1000m以下山地采用袋苗造林，造林密度一般为3×3m，造林成活率≥90％，造林3年后的保存率为89％。非洲桃花心木栽培4～5年即可郁闭成林，生长旺季为5～10月，12月至翌年4月林木生长缓慢，以半落叶的生理方式渡过冬旱季节。与种源地天然林中的非洲桃花心木相比较，两地5a生、10a生及25a生树高、胸径基本接近，能正常开花结实，表明非洲桃花心木适宜德宏热区造林。

Seed germination and seedling planting trials of Khaya sengalensis introduced from Hainan by Dehong Prefecture Forestry Research Institute have been carried out. The results showed that the seeds of Khaya sengalensis was hard to storage which required immediately planting, and germination rate was 68% , 1 - 2cm of covering soil thickness was appropriate, below 1000m altitude mountain of Dehong hot zone suggested using seedling planting bags, planting density generally recommended as 3m × 3m, affor- estation survival rate could be up to ≥ 90% , three years after planting preservation rate was up to 89%. Four to five years cultivated, the Khaya sengalensis could grow to mature forest, and growing season was from May to October, trees grew slowly in Decenlber to next April, using semi-deciduous physiological way to spend the winter drought season. Compared with provenances in natural forests, tree height and diameter at breast height of two 5a old, 10a and 25a old were close, normal flowering and fruiting, which showed that Khaya sengalensis was suitable for afforestation in Dehong hot zone.