發(fā)布時間：2019-02-23 19:59

【摘要】：以貴州省錦屏縣第四次森林資源二類調查系統(tǒng)抽樣為例,對角規(guī)點抽樣的標準表法和圓形樣地每木檢尺的二元立木材積表法進行了比較和分析。結果表明:角規(guī)樣地與圓形樣地對總體蓄積抽樣精度分別為90.28%,90.38%,均達到規(guī)定的精度要求(≥90%),總體蓄積估計值僅相差1.63%;角規(guī)樣地檢尺樣木株數較少,外業(yè)工作量相當于圓形樣地的40%左右,抽樣效率較高;角規(guī)樣地對大部分林分公頃株數、公頃斷面積、公頃蓄積的抽樣估計偏低。小班蓄積采用角規(guī)輔助調查的標準表法,總體蓄積采用圓形樣地每木檢尺的二元立木材積表法進行抽樣控制的方法是可行的。
[Abstract]:Taking the fourth forest resources survey system sampling in Jinping County, Guizhou Province as an example, this paper compares and analyzes the standard table method of angle gauge sampling and the dual standing timber volume table method of circular sample plot. The results show that the sampling accuracy of the total volume of the angular and circular plots is 90.28% and 90.38% respectively, which both meet the required accuracy (鈮，

本文編號：2429145