DB52T 773-2012 柏木二元立木材积表 12页

ICS79.040B68DB52贵州省地方标准DB52/T773—2012柏木二元立木材积表Thebinarystandingtreevolumetableofcypress2012-09-21发布2012-10-21实施贵州省质量技术监督局发布\n\nDB52/T773—2012目次前言................................................................................II1范围..............................................................................12术语和定义........................................................................13柏木二元立木材积模型及表..........................................................13.1柏木二元立木材积模型..........................................................23.2柏木二元立木材积表............................................................24使用方法..........................................................................24.1径阶划分......................................................................24.2树高阶划分....................................................................24.3单株立木材积计算..............................................................2I\n\n学兔兔www.bzfxw.comDB52/T773—2012前言本标准按照GB/T1.1-2009《标准化工作导则第1部分：标准的结构和编写》给出的规则起草。本标准由贵州省林业厅提出并归口。本标准起草单位：贵州省森林资源管理站。本标准起草人：朱松、夏忠胜、罗洪章、尹晓阳、姚祖岩、向琼、颜伟、唐玉萍。II\n\nDB52/T773—2012柏木二元立木材积表范围1范围本标准规定了贵州省柏木二元立木材积模型及表、使用方法，适用于贵州省柏木。2术语和定义下列术语和定义适用于本文件。2.1胸径diameteratbreastheight从根颈起向上1.3米处树干的带皮直径。2.2径阶diameterclass林木胸径的整化，即把一定范围内的胸径用该范围的中间值来表示。2.3树高treeheight从根颈起向上到树梢的树干全部高度。2.4树高阶treeheightclass林木树高的整化，即把一定范围内的树高用该范围的中间值来表示。2.5材积volume指不包括枝丫的全树干体积。2.6二元立木材积表binarystandingtreevolumetable指依据立木材积与胸径、树高两个因子间的关系而编制的立木材积计量数表。3柏木二元立木材积模型及表1\nDB52/T773—20123.1柏木二元立木材积模型(1.9148-0.0045828×(D+H))(0.74041+0.00668×(D+H))V=0.000085626×D×H式中：3V—材积，单位为m；D—胸径，单位为cm；H—树高，单位为m。3.2柏木二元立木材积表依据模型展开的柏木二元立木材积表见表1。4使用方法4.1径阶划分径阶按2cm整化，如5.0cm～6.9cm为6径阶。4.2树高阶划分树高10m以下按1m级距分级，如2.5m～3.4m为3树高阶；10m以上按2m级距分级，如11.0m～12.9m为12树高阶。但9.5m～10.9m为10树高阶。4.3单株立木材积计算单株立木材积可将实测胸径、树高带入模型直接计算，或将实测胸径、树高整化后查表1。2\nDB52/T773—20120.14350.18410.20690.22930.25770.27880.28760.31350.33250.34990.37410.39030.41770.43940.46360.45190.49080.50910.54490.51720.56900.60180.58310.63190.58610.65210.69820.66130.72460.74000.80090.82270.88120.90971.00131.09780.12660.11040.34470.39720.39380.45420.44530.51423H/mV/m0.21780.25460.25480.29270.29830.34330.12660.15100.15340.17610.18310.20210.21380.2456表1柏木二元立木材积表0.11470.08300.09250.10210.12150.14160.16240.05770.06500.07240.07980.09490.01040.01190.01790.01340.02040.01480.02710.02300.01630.03100.02550.01940.03800.03480.02810.04350.03870.03330.04890.04260.05440.05060.05990.05890.07120.08280.09490.00900.02320.01280.0154345678910121416182022242628300.00590.0075681012141618202224262830D/cm3\nDB52/T773—2012301.38381.53741.69791.86502.03852.21822.40392.59532.79232.99463.20203.41423.6311281.26121.40071.54621.69761.85462.01712.18482.35762.53512.71732.90383.09443.2890261.02441.14491.27091.40221.53871.68011.82631.97702.13212.29122.45432.62112.7913240.92601.03441.14761.26551.38781.51451.64521.77971.91802.05982.20483H/m22V/m0.83250.92931.03041.13551.24441.35691.47301.59231.7146200.74340.82930.91871.01171.10781.20701.30911.4139（续）表1柏木二元立木材积表__________________________________180.65830.73380.81230.89360.97761.0641160.57700.64250.71050.7808140.49910.55503234363840424446485052545658D/cm4\n\nDB52/T773-2012