思茅松纸浆用材林初植密度与合理采伐年龄分析  

Preliminary Study on Initial Density and Rational Cutting Age of Pinus kesiya var.Langbianensis Pulpwood Plantation

作　　者：刘永刚 胡光辉 陈伟 冯弦 孟梦 LIU Yong-gang;HU Guang-hui;CHENG Wei;FEN Xian;MENG Meng(Yunnan Academy of Forestry and Grassland,Kunming Yunnan 650201,P.R.Chna)

机构地区：[1]云南省林业和草原科学院,云南昆明650201

出　　处：《西部林业科学》2022年第5期1-8,共8页Journal of West China Forestry Science

基　　金：云南省技术创新人才培养对象项目(202105AD160016)。

摘　　要：为探究适用于思茅松纸浆用材林培育的较佳初植密度,以达到增加思茅松纸浆林营林收益的目的,以5种不同初植密度的思茅松人工林为研究对象,对其进行林分生长、收获量测算及数量成熟龄、工艺成熟龄和经济成熟龄分析,在确定采伐龄的基础上进行经济效益评价,选择出经济效益较好的纸浆林初植密度。结果显示:(1)胸径生长用Von Bantalanffy方程拟合效果最好;树高生长可用Von Bantalanffy方程、逻辑斯谛方程拟合;单位面积蓄积量的生长拟合首选冈珀斯模型,其次为逻辑斯谛方程。(2)立地条件好的林分,其数量成熟龄较立地条件差的林分早;密度大的林分,其数量成熟龄较密度小的林分来得早。立地条件好的林分其经济成熟龄较立地条件差的来得早,在立地条件差的林地上,不宜采用较高的初植密度。在观测期内,各林分皆已达工艺成熟龄。立地条件好的林分其工艺成熟龄比立地条件差的来得早、初植密度大的林分比初植密度小的来得晚。(4)在立地指数为15的林地上,初植密度为4444株/hm^(2)的林分在11 a时经济效益较好,不宜采用10000、5000株/hm^(2)的初植密度。在立地指数为17的林地上,10000株/hm^(2)的初植密度林分效益最好。研究结果表明,应根据立地条件确定初植密度,高密度不宜营造在差的林地上、好的林地不宜选择较小的初植密度,在立地指数17的林地上选择4444~10000株/hm^(2)的初植密度;在立地指数为15的林地上,采用4444株/hm^(2)初植密度能获得较好的经济效益。In order to explore the better initial planting density suitable for the cultivation of Pinus kesiya var.langbianensis pulpwood plantation,so as to increase it’s economic benefits,taking five different initial planting densities of Pinus kesiya var.langbianensis plantation as the research object,the stand growth,harvest,quantitative maturity,technological maturity and economic maturity were calculated,the economic benefit was evaluated on the basis of determining the cutting age,and the initial planting density of pulp forest with good economic benefit was selected.The results showed that:(1)Von Bantalanffy equation was the best fit for DBH growth;Tree height growth can be fitted by Von Bantalanffy equation and Logistic equation;Compertz model is the first choice for the growth fitting of unit area volume,followed by Logistic equation.(2)The quantitative maturity of stands with good site conditions is earlier than that of stands with poor site conditions;The quantitative maturity age of stands with high density come earlier than those with low density.The economic maturity of good site conditions is earlier than that of poor site conditions,and higher initial planting density is not suitable for poor site conditions.During the observation period,all stands have reached technological maturity.The technological maturity of the forest with good site conditions comes earlier than that with poor site conditions,and the forest with large initial planting density comes later than that with small initial planting density.(4)On the site with site index of 15,the economic benefit of the forest with initial planting density of 4444 trees/hm^(2) is better at 11 years,and the initial planting density of 10000 and 5000 trees/hm^(2) should not be used.On the site with the site grade index of 17,the benefit of the first planting density of 10000 plants/hm^(2) is the best.The results showed that the initial planting density should be determined according to the site conditions,the high density plantation should not be planted o

关 键 词：思茅松 纸浆用材林 初植密度 森林成熟 采伐年龄 

分 类 号：S791.259[农业科学—林木遗传育种]