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林业科学 ›› 2000, Vol. 36 ›› Issue (1): 15-20.doi: 10.11707/j.1001-7488.20000103

• 论文及研究报告 • 上一篇    下一篇

马尾松人工纸浆材林采伐年龄初步研究

丁贵杰   

  1. 贵州大学造林生态研究室,贵阳550025
  • 收稿日期:1998-08-31 修回日期:1900-01-01 出版日期:2000-01-25 发布日期:2000-01-25

THE PRELIMINARY STUDY ON OPTIMUM CUTTING AGE OF PULPWOOD STAND FOR MASSON PINE PLANTATION

Ding Guijie   

  1. Research Group of Planting and Ecology,Guizhou University Guiyang550025
  • Received:1998-08-31 Revised:1900-01-01 Online:2000-01-25 Published:2000-01-25

摘要:

为建立马尾松人工林生物量预测方程和解决纸浆材林合理采伐年龄问题,用265 株径阶生物量标准木,建立了各种规格树干带皮、去皮生物量预测方程,解决了纸浆材林各种规格树干生物量的预测问题;根据立地和栽培措施的不同,为每个指数级设计了15 种纸浆材林培育模式,并分别求出了它们的数量、工艺、经济成熟龄,以3 种成熟龄为基础,分别确定了各指数级最佳采伐年龄,使最佳采伐年龄比目前采伐规程中规定的采伐年龄(31~40a) 下限缩短了12~15a ,内部收益率提高了4.22%~9.47% 。研究了立地、经营状况( 初植密度、间伐) 、经济条件与采伐年龄的关系,结果表明:随立地指数的提高,数量成熟、经济成熟均提前;随着造林密度增加,数量成熟提前;间伐可推迟数量成熟和经济成熟;随着贴现率提高,经济成熟提前,每提高3% ,约提前2a;每降低3% ,约推迟1~2a。

关键词: 马尾松, 纸浆材, 采伐年龄, 成熟龄

Abstract:

In order to establish the biomass forecast equation and solve cutting age of pulpwood stand for Masson pine (Pinus massoniana Lamb.)plantation,forecast equations of various stem economic biomass with and without bark were established with 265 diameter grade biomass sample tree in this paper,forecast problems of various stem economic biomass of pulpwood stand were resolved.According to the differnces in site index and cultivation measures,15 silviculture patterns of pulpwood stand were given for each site index.The stand quantitative,technical and economic mature ages of various silviculture patterns were calculated,then optimum cutting age of various site index were determined,it was 12~15 years shorter than cutting age being used,and it's IRR was raised 4.22%~9.47%.The relations between cutting age and site,silvicultural condition(planting density,thinning),economic condition were studied.The results showed that quantitative and economic mature ages reduce with the raising of site index,the quantitative mature ages reduce with planting density increase,the quantitative and economic mature ages postpone with thinning times increase.The economic mature age reduce with discount rate increase,while discount rate was raised 3% the economic mature age reduce about 2 years,otherwise,the economic mature age put off about 1~2 years.

Key words: Masson pine, Pulpwood, Cutting age, Mature age