摘要
在江西景德镇和安徽泾县布置了１年生湿地松裸根苗生长后期切根和截顶试验，研究其对苗木形态和造林表现的效应及其合理应用制度。两年的结果表明，切根苗的高、径及主根形态指标均低于未切根苗，而侧须根系增加，早切根及多次切根处理效应最显著。造林后切根苗生长表现优于对照，在干旱及植被竞争激烈的立地，表现出较高成活率。截顶苗的各项形态指标都低于对照，但截顶对苗木的造林表现无负效应，截顶因解除了弱小苗木的受压而提高了苗木的整齐度，但过晚截顶不利于苗木及时封顶。
Bareroot slash pine seedlings were subjected to undercutting and top pruning treatments including different executing time and frequency,to evaluate the effects on seedling morphology and field performance.The results showed that undercutting treatmens reduced seedling height and diameter,and improved root fibrosity,earlier and multiple ones had more pronounced effects,undercutted seedlings displayed better growth than the control and higher survival rate on dry or severely vegetation competitive sites.Top pruned seedlings were smaller,but there were no negative effects from top pruning on field performance,the seedling uniformity were increased due to the small seedlings free of depression,but later top pruning was harmful to seedling bud formation timely.The application principles of the treatments as cultural practices were proposed.
出处
《林业科学研究》
CSCD
北大核心
1997年第2期182-188,共7页
Forest Research
基金
1991~1995年世界银行贷款国家造林项目
关键词
湿地松
切根
截顶
造林
生长
slash pine undercutting top pruning seedling morphology field performance
