造林密度和施肥量对黑荆人工林经营目标和经济效益的影响  

Effects of Planting Density and Fertilization Amount on Management Objectives and Economic Benefits of Acacia mearnsii Plantation

作　　者：黄荣林[1] 王仁杰 刘雄盛[1] 唐连德 蒋琳 邓玉华 蒋燚[1] Huang Ronglin;Wang Renjie;Liu Xiongsheng;Tang Liande;Jiang Lin;Deng Yuhua;Jiang Yi(Guangxi Forestry Research Institute,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Key Laboratory of Central South Fast-growing Timber Cultivation of National Forestry and Grassland Administration,Nanning,Guangxi 530002,China;Guangxi State-owned Huangmian Forest Farm,Luzhai,Guangxi 545600,China)

机构地区：[1]广西壮族自治区林业科学研究院广西优良用材林资源培育重点实验室国家林业和草原局中南速生材繁育重点实验室,广西南宁530002 [2]广西国有黄冕林场,广西鹿寨545600

出　　处：《广西林业科学》2020年第3期329-335,共7页Guangxi Forestry Science

基　　金：林业公益性行业科研专项经费项目(201104019)。

摘　　要：研究林分密度和施肥交互作用下黑荆(Acacia mearnsii)人工林的生长状况和经济效益,旨在筛选优良的黑荆人工林经营模式。以黄冕林场4年生黑荆人工林为研究对象,设置3种林分密度(D1:2500株/hm2、D2:1667株/hm2、D3:1250株/hm2)和3种施肥水平(W1:0 kg/株、W2:0.5 kg/株、W2:1 kg/株),共9个处理,5年后测定不同处理下黑荆林的林分结构、胸径、树高和冠幅,分析单株材积、单位面积蓄积量、单株和单位面积的单宁产量和原花色素产量及经济效益。结果表明,林分密度的减小和施肥量的增加能使黑荆大规格材率增加;平均胸径、树高、单株材积、单株单宁和原花色素产量在D3W3处理下最大,且显著大于其他处理;平均冠幅在D2W3处理下最大;单位面积蓄积量、单宁和原花色素产量在D1W3处理下最大,且显著大于其他处理。D3W3经营模式的收入较高,成本较低,最终利润最高,D1W3的收入和成本均最高,最终利润较低。在考虑成本的前提下,D3W3经营模式(1250株/hm2、施肥1 kg/株)是最适宜黑荆人工林生长并产生经济效益的经营模式。Growth status and economic benefits of Acacia mearnsii plantation under interaction of stand density and fertilization were studied in order to screen out excellent management model of A.mearnsii plantation management.4-year-old A.mearnsii plantation in Huangmian forest farm was taken as research object.Three kinds of stand density(D1:2500 plant/hm2,D2:1667 plant/hm2,D3:1250 plant/hm2)and fertilization degree(W1:0 kg/plant,W2:0.5 kg/plant,W3:1 kg/plant)were designed with 9 treatments.After 5 years,stand structure,DBH,tree height and crown width of A.mearnsii with different treatments were determined,and individual volume,accumulation unti area,tannin yield and proanthocyanidin yield per plant and unit area,and economic benefits were analyzed.Results showed that reduction of stand density and increase of fertilization amount could increase large-sized timber ratio of A.mearnsii.Average DBH,tree height,individual volume,tannin and proanthocyanidin yield per plant reached maxima under D3W3 treatment and were significantly larger than other treatments.Average crown width reached the maximum under D2W3 treatment.Accumulation,tannin and proanthocyanidin yield unit area reached maxima under D1W3 treatment andweresignificantlylarger thanother treatments.D3W3 management model hadhigher income and lower cost,and the final profit was the highest.D1W3 management model had the highest income and the highest cost,and the final profit was lower.Considering cost,D3W3 management model(1250 plant/hm2;fertilizer 1 kg/plant)was the most suitable model for growth and economic benefits of A.mearnsii plantation.

关 键 词：森林经营 正交试验 黒荆 经营目标 经济效益 

分 类 号：S792.99[农业科学—林木遗传育种]