This paper took systematic sampling as an example in the fourth forest inventory for planning and design in Jinping County of Guizhou Province,and the point sampling with angle gauge & volume standard table and circle-shaped sample tally & two-way tree volume table were compared and analyzed.The results showed that the precisions of the volume estimates from the point sampling with angle gauge and circle-shaped sample tally were respectively 90.28%and 90.38%,exceeding 90% which is the precision standard of the technical specification for the forest inventory in Guizhou.The difference of total forest stand volume between two forest inventories was only 1.63%;The sample tree of the point sampling with angle gauge was less,but more efficient than the circle-shaped sample tally in sampling,and the load of field work of the former was about 40% of the latter;the number of trees per hectare,cross-sectional area at breast height of per hectare and hectare volume were lower than the circle-shaped sample tally in the precisions of estimates.Subcompartment volume cruise with angle gauge & volume standard table,systematic sampling with circle-shaped sample tally & two-way tree volume table are applicable in the sampling control of total volume.
XU Zhengliang
,
WANG Yingquan
,
LU Yongfei
,
YANG Jie
. Comparison and Analysis on Two Kinds of Sample Plot Survey Methods of Systematic Sampling in the Forest Inventory for Planning and Design[J]. Forest and Grassland Resources Research, 2016
, 0(3)
: 140
-144
.
DOI: 10.13466/j.cnki.lyzygl.2016.03.025
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