桂西南岩溶地区珍稀濒危树种育苗与造林初报

2003～2005年,在广西平果县龙何示范区对10种岩溶珍稀濒危树种的育苗和造林的技术及效果进行了初步研究。试验结果表明,在苗圃育苗的9个树种中,仪花和广西顶果木的发芽率不足50%,其他树种则在70%以上;蒜头果有轻微性的根结线虫危害,其他树种的病虫害很少,大多数树种苗木均表现出早期生长慢、后期生长快的势头。在直播造林中,苏木的效果最好,蒜头果次之,而蝴蝶果、广西顶果木和海南椴等很差;任豆、东京桐等5个树种的植苗造林成活率超过75%,其中任豆和广西顶果木的株高平均年生长量大于40cm,东京桐、蝴蝶果和海南椴等树种则小于25cm。

Preliminary study on seedling and afforestation of rare and endangered trees in karst region of Southwest Guangxi

During 2003-2005,the technique and the effect of cultivating seedlings and afforestation of 10 karst rare and endangered trees were studied in Longhe Eco-restoration Demonstration District.The preliminary effect showed that 9 tree species which were seeded in the nursery,the germination rate of Lysidice rhodostegia and Acrocarpus fraxinifolius were under 50%,and the rest had over 70%.Malania oleifera was disserved lightly by root-knot nematode,and the rest was seldom plant diseases and insect pests.Most of ...