整合生物量及碳汇的帽儿山地区兴安落叶松31年生种源选择

Integrating Biomass and Carbon Sequestration of 31-Year Dahurian Larch (Larix gmelinii (Rupr.) Rupr.) Provenance Selection in Maoershan

林木遗传改良的主要目的是选育生产力大的良种,但是随着木材市场和全球气候变化,林业生产更加关注生物量和碳汇功能。对帽儿山31年生兴安落叶松生物量和碳储量的分配模式,以及同生长性状相关性、异俗生长模型和遗传力进行分析,并初步选择了生物量和碳储量大的优良种源。兴安落叶松树干(含树皮)生物量、碳储量分别占地上部分总体的74.17%、62.50%,伐倒木、立木材积同生物量呈极显著相关,碳质量分数从大到小依次为:树叶、树皮、树枝、树干,胸径处碳质量分数与总体平均碳质量分数相关系数为0.615,显著水平为0.058。对于生物量估算各类异速生长模型中,Y=aDbHc和Y=aDb两种模型较适宜兴安落叶松的生物量估算。两个模型对树干生物量和地上部分生物量预测误差小于5%,预测准确性较好。将实验林数据带入Y=aDb模型中,生物量与碳储量种源遗传力约为0.36,最优种源为友好林业局,生物量和碳储量分别比整体平均值高40.38%、43.92%,比最差中央站种源高130.66%和130.44%。

We analyzed the partitioning model of the biomass and carbon stock of 31 years old Dahurian Larch （ Larix gmelinii （ Rupr. ） Rapt. ）, their relationship with the growth trait, selection and primary selected provenance for biomass and carbon sequestration. The stem （ bole wood and bark） of L. gmelinii accounted for 74.17% of biomass and 62.50% of carbon aboveground. The correlation between felled and standing timber volume with biomass was highly significant. The sequence of carbon concentration for different organ was foliage〉bark〉branch〉bole wood. The correlation coefficient between carbon concentration at diameter at breast height （DBH） level and average of total abovegrannd was 0.615, with the significant level of 0.058. The models of Y=aDbH and Y=aDh are most suitable for estimating the biomass of L. gmelinii among all the al- lometry model with 5% of standard error. When the inventory data of provenances test is taken in the Y= aDb model, the provenance heritability of biomass and carbon stock is 0.36. The best provenance is Youhao, biomass and carbon stock exceed the test average by 40.38% and 43.92%, and exceed the worst provenance （Zhongyangzhan） by 130.66% and 130.d4%, respectively.