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在构建不同经营模式马尾松未漂硫酸盐浆(UBMKP)生产成本函数的基础上,尝试研究目标性状木材产量(V)、木材密度(SG)和制浆得率(PY)的经济权重及对育种的重要性,建立相应的育种目标和选择方程。研究发现,目标性状对育种的重要性与纸浆生产的成本构成有关。对包括从纸浆林营建到制浆等阶段的林纸一体化的造纸企业,由于与PY和SG有关的木材收获、运输和制浆等未来成本分量在纸浆生产总成本中所占比例很高,因而PY和SG对降低纸浆生产成本的重要性较高,随着贴现率的提高,PY和SG的重要性下降。对于仅靠生产和出售木材的纯林业生产系统,V是最重要的育种目标,可较少考虑SG和PY。敏感性分析指出,对于林纸一体化的企业,成本构成、贴现率和轮伐期等变量对选择决策影响较小。对纸浆生产不同经营模式下育种经济效果的分析表明,若入选率为10%,经过第1代遗传改良,生产能力为2×105t·a-1UBMKP的纸厂每年可获得657.6～746.8万元的额外效益。
Based on the cost function of UBMKP in different management modes, this paper attempts to study the economic weight of wood yield (V), wood density (SG) and pulp yield (PY) The importance of breeding, establishment of appropriate breeding objectives and selection equations. The study found that the importance of target traits to breeding is related to the cost of pulp production. For paper-making enterprises integrating forest and paper from the establishment of pulpwood to the pulp-making stage, since the proportion of future cost components such as timber harvesting, transportation and pulping related to PY and SG is a high proportion of the total cost of pulp production, The importance of PY and SG to reduce pulp production costs is therefore high, and the importance of PY and SG declines as the discount rate increases. For pure forestry systems that rely solely on the production and sale of wood, V is the most important breeding goal, with less consideration for SG and PY. Sensitivity analysis shows that for the forestry-paper integrated enterprises, variables such as cost composition, discount rate and rotation period have less impact on the choice decision. The analysis of the economic effects of breeding under different management modes of pulp production shows that if the selection rate is 10%, after the first generation of genetic improvement, the paper mill with a production capacity of 2 × 105t · a-1UBMKP can obtain 657.6 ~ 7468 thousand yuan per year Extra benefits.