摘要
思茅松Pinus kesiya var.langbianensis为云南省思茅市特有的乡土树种,具生长快、耐瘠薄、材质好等特性.采用逐步聚类分析方法,对思茅松百日营养袋苗进行分级研究,初步分为3级,Ⅰ级苗苗高≥18.5 cm,地径≥0.29 cm;Ⅱ级苗苗高15.5～18.5 cm,地径0.24～0.29 cm;Ⅲ级苗苗高≤15.5 cm,地径≤0.24 cm.方差分析及不同级别苗木造林试验表明,该分级标准是可行的,在生产实践中具有指导意义.对思茅松幼林的施肥效应研究表明,每株施用氮肥100 g,磷肥50 g,钾肥50 g,即可达到幼林生长的要求.
Pinus kesiya var. langbianensis is a native tree species in Simao City, with fast-growing, barren-landtolerating and excellent timber. By adopting stepwise clustering analysis, the classification of 100-day container seedlings was studied. Three classes, i. e. Ⅰ , Ⅱand Ⅲ , were preliminarily categorized, among which seedlings with height≥ 18.5 cm and base diameter≥0.29 cm were clustered in the Class Ⅰ , seedlings with 15.5 cm≤height ≤ 18.5 cm and 0.24 cm≤base diameter≤0.29 cm were in Class Ⅱ , and seedlings with height ≤ 15.5 cm and base diameter≤0.24 cm were in Class Ⅲ . The results of variance analysis and plantation experiments showed that the seedling classification was practical and could guide the seedling production and cultivation. And furthermore, fertilization experiments indicated that 100 g nitrogen, 50 g phosphorus and 50 g potassium fertilizer could meet growth requirements of young stands. [ Ch, 3 tab. 11 ref. ]
出处
《浙江林学院学报》
CSCD
北大核心
2005年第4期396-399,共4页
Journal of Zhejiang Forestry College
基金
"八五"云南省科技攻关项目(95A5-4)
关键词
森林培育学
思茅松
速生丰产
施肥
苗木分级
silviculture
Pinus kesiya vat. langbianensis
high-yielding and fast-growing
fertilization
seedling classification
