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Plantationsofdahurianlarch(LarixgmeIini(Rupr)Rupr.)haveestablishbdandhavebecomeanimportanttimberspeciesintheforestreserveresourcesinthenortheastofChina.Soformingtheforesttableswhichhavehighprecisionformakinglogicalmanagementdecisionsha$beenimportantproblemstobesolvedquicklyinforestrypractice.Uptonow,thereisalackofsystematicforestrytablesfordahurianlarchplantations.Themainpurposeofthispaperistotrytoconstructaseriesofsomeforestrytablesfordahurianlarchplantations.MATERIALSANDMETHODSData… 相似文献
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Hao Wenkang Lang Kuijian Zhang YanliNortheast Forestry UniversityLi LongchangZhe Jiang Forestry CollegeWeng GuoqingAcademy of Forest Survey PlanningHuang Mingquan Wang XiangguoDaxingan Mountain Forestry Management Bureau of Inner Mongolia 《林业研究》1993,(2)
Site quality of larch(Larix gmelinii Rupr.)in Da Xingan Mountain in InnerMongolia was studied systematically with about 1000 temporary plots and computersoftware.The nature of site class and site index curve was discussed in view of generalmathematical model of height growth.The height growth of dominant tree of four divisionsof forest stands were studied and site index tables were constructed respectively.In orderto unify the comparing standard and convenience for management in this region,site indextable was constucted too.Based on discussing the action and accuracy of forest type,aseries of site quality evaluation(forest type-site index class-site index)was suggested. 相似文献
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Hao Wenkang Lang Kuijian Zhang Yanli Li Longchang Weng Guoqing Huang Mingquan Wang Xiangguo 《林业研究》1993,4(2):33-42
Site quality of larch (Larix gmelinii Rupr.) in Da Xingan Mountain in Inner Mongolia was studied systematically with about 1000 temporary plots and computer software.
The nature of site class and site index curve was discussed in view of general mathematical model of height growth. The height
growth of dominant tree of four divisions of forest stands were studied and site index tables were constructed respectively.
In order to unify the comparing standard and convenience for management in this region, site index table was constucted too.
Based on discussing the action and accuracy of forest type, a series of site quality evaluation (forest type-site index class-site
index) was suggested.
This subject of study is supported by the National Natural Scientific Fund (No. 39270549). 相似文献
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通过分析福建省桉树调查的资料,对影响桉树生长的主导因子进行等级划分,建立数量化地位指数模型,编制数量化立地质量评定表。该表不仅使用方便,可操作性强,而且精度高,为福建省桉树选择理想造林地提供了依据,对促进桉树的栽培与推广具有重要意义。 相似文献
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思茅松人工林地位指数表的编制与应用 总被引：2，自引：0，他引：2
以lgH=a b／A等6个数学模型拟合收集到的166块思茅松人工林标准地优势木树高导向由线，结果选用拟合效果较好的Riehards函数模型：H=26．6907(1-e^-0．049999A)^0.9515编制地位指数表。基准年龄为20年，用标准差调整法导出思茅松人工林11～23间7条地位指数曲线，经连续树高值检验、落点检验，结果表明，该地位指数表编制精度为91．1％，可用于思茅、版纳等地区的思茅松人工林立地质量评价和生长过程预测。 相似文献
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安徽亳县泡桐立地质量评定 总被引：2，自引：0，他引：2
本文在分析林木直径和树高的相关性的基础上,结合平原农区地形地貌特征,以林分内最大径阶木的平均胸高直径代替优势木的平均树高作因变量,以林分平均林龄和土壤种类、土层厚度、地下水位、株距等定性因子作为自变量,分别编制出安徽省亳县泡桐人工林地位指数表和数量化地位指数表,并在此基础上将泡桐人工林划分为14个立地类型。该项研究对于探讨平原农区主要树种有关经营数表的编制方法、立地类型划分和林木生长预估等具有普遍意义。 相似文献
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IntroductionKoreanpine(PinuskOraiensisSieb.etZucc.)isoneofthemostimportanttimberspeciesanditisnaturaIIydistributedinHeilongjiang,JiIinandLiaon-ingprovincesinChina.ManyforestryresearchersmadeextensiveandprofoundstudiesonthisspeciesJiangYiyin(1985)studiedthegroWthandgrowthmodelsforpIantationsofKoreanpine.However,veryfewpaperswerefoundonthegroWthmodeIsofnaturalKoreanpineforest.Koreanpinehasa1onggroWthperiod.ForextensivelymanagingKoreanpineforest,itneedstheJorestrytabIeswithhighac-Curacy… 相似文献
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为了评价立地质量,用１５５块油松人工林标准地,用三个数学模型进行拟合,最后选定用模型１gＨ＝０．１４２９＋０．５１５３１gＡ编制地位指数表,基准年龄为２５a,用变 异系数法导出６,７,８,９四条地位指数曲线。经用相关指数检验和优势木解析木进行Ｘ＾２检验,结果表明：该地位指数表适用于晋中东部册区的油松人工林。 相似文献
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以武陟县的杨树人工林为例,通过调查获得的样地资料,采用地位指数曲线模型拟合的方法,选择最佳拟合曲线方程编制出杨树人工林立地质量评价更方便、准确、直观的地位指数表。 相似文献
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We constructed sugi site index models using digital-terrain-analysis-based environmental factors for Miyazaki Prefecture.
We selected 18 sugi plantation stands which were pure, undisturbed, and over 40 years old, planted with the same sugi-cutting
cultivar, and managed by normal forest operations. The dominant tree in each stand was felled for stem analysis. Site index,
defined here as dominant tree height at 40 years old, was estimated by stem analysis for each stand. Five types of DEMs were
used: 100- and 50-m resolution derived from DEMs published by the Geographical Survey Institute, and 50-, 25-, and 12.5-m
resolution derived from digital contour map manually generated from a 1:25,000 topographic map. A total of 14 indices categorized
into solar radiation index, wetness index, and topographic exposure index were used to model the site index by multiple linear
regression analysis. Through model selection procedures, the best-fitted site index models were selected for each type of
DEM. The most precise model was that of the 12.5-m-resolution DEM (R
2 = 0.692), following the model of the published 50-m-resolution DEM (R
2 = 0.665). Site productivity of sugi was severely limited by direct solar radiation. Soil wetness also affected sugi site
productivity; however, it can only be represented using a high-resolution DEM derived from fine-scale data. Our results suggest
that the 50-m-resolution DEM published by the Geographical Survey Institute can be used for site index modeling. 相似文献
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湖北省南方型杨树人工林立地指数表的编制 总被引：3，自引：0，他引：3
根据全省杨树主栽品种混系造林的生产实际以及南方型杨树品种(品系)间高生长过程的相似性,利用31块标准地优势木树干解析资料,把方程lgH=0.730+0.6011lgA作为导向曲线数学模型,编制了湖北省南方型杨树立地指数表。该表对于指导杨树的分类经营、定向培育,以及配套经营技术的研究与开发具有重要意义,同时,对于树高生长过程与南方型杨树相似的其它杨树品种(品系)也可参考使用。 相似文献
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闽东柳杉人工林立木材积表和地位指数表的编制 总被引：5，自引：0，他引：5
本文根据258株柳杉样木资料，编制了一元和二元立木材积表，其模型为V=aDb和V=aDbHc，所编制的材积表经过检验证明适用。根据70株优势木的树于解析材料，用Richards方程编制多态形地位指数表。 相似文献
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基于广西区收集的马占相思工业人工林林分标准地及优势解析木73株，拟合其优势树高生长的Chpman-Richards模型；从14～26m指数级拟合总剩余标准差小于0．29m，最大的为0．40m；以15a作为基准年龄，采用参数预估法编制了该区域的马占相思林多形地位指数表；经另置的31株优势解析木样本检验，指数级预报误差平均值为0．38m，最大误差为0．55m；龄级的预报误差平均值为0．33m，最大0．65m；所研建的模型用于编表，适应性能好。 相似文献
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利用森林资源连续清查数据编制地位级表 总被引：1，自引：0，他引：1
首先利用新疆阿勒泰山国有林管局森林资源连续清查中的279块华山松样地,通过对比选择了方程作为地位级导向曲线的最优模型;在此基础上采用等分法编制了地位级表,并对其精度进行了检验;结果表明其精度可靠,达到了林业生产和调查的要求。 相似文献