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泡桐是华北平原农区重要的速生用材树种,其原木是我国传统出口商品。但从六十年代以来,国内外均提出用我国现行原木材积表(LY 108-61)衡测泡桐原木材积误差过大,外贸部门和外商反映尤为强烈。为了解运用原木材积表衡测泡桐原木材积的误差状况,我们随机抽取了兗州、成武,烟台和民权等县、市的泡桐原木1,050根,以实测材积(一米区分段求积法)和查LY 108-61原木材积表所获数据相比较,并计算了误差(见表1)。
Paulownia is an important fast-growing timber species in the North China Plain, and its logs are the traditional export commodities in China. However, since the 1960s, domestic and foreign countries have proposed to measure the error of logs of Paulownia trees by using the current log inventory (LY 108-61) in our country, which is especially reflected by foreign trade departments and foreign investors. In order to understand the error of logging volume of Paulownia by using log scale, we randomly selected 1,050 paulownia logs from counties and cities of Yanzhou, Chengwu, Yantai and civil rights. Based on the measured volume (one-quarter zone quadrature method) and Check the data obtained from the LY 108-61 logbook comparison and calculate the error (see Table 1).