摘要
杉木檫树人工混交造林效果研究表明,杉檫(6杉4檫)星状混交,14a生时,种间关系比较协调,充分利用了营养空间且改良土壤效果显著,明显地提高林分产量和质量,蓄积量和生物量分别比杉木纯林提高了41.42%和23.74%。但在现行造林密度条件下,此时混交林分结构稳定性较差,急需进行适当的间伐以进一步改善种间关系和林分结构。此外,檫木对磷素的需求量较大,在严重缺磷的地方造林时,多施磷肥是相当必要的。
The study shows that Cunninghamia lanceolata and Sassafras are mixed in star,when they were 14 years old, the interspecific relation is relatively coordinative, the stands spatial distribution pattern is reasonable, the nutritive space is fully utilized and effect of improving soil is evident, the stand yield and quality are evidently increased, the stocking and biomass of mixed forest stands relatively increase by 41.42% and 23.74% as compared with those of C.lanceolata pure forests. But on the condition of present planting density, the mixed stand striec re isn＇t stable enough at the moment, there is an urgent need to improve interspecific relation further and adjust stand structure through proper thinning, furthermore, the Sassafras need quantity of phosphorus more. so that, increasing p fertilizer is necessary on woodland of destitute P.
出处
《青海农林科技》
2006年第2期83-86,共4页
Science and Technology of Qinghai Agriculture and Forestry
关键词
檫树
杉木
混交林
造林效果
Sassafras
Cunninghamia lanceolata
Mixed stands
Afforestation effect
