作　　者： ; ; ; ; ;

机构地区： 湖南会同杉木林生态系统国家野外科学观测研究站湖南会同438107

出　　处： 《中南林业科技大学学报》 2012年第6期104-109,共6页

摘　　要： 杉木Cunnighamia lanceolata是我国优良速生用材树种,其面积达921万hm2,占全国人工用材林面积的30.4%。用机理性模型在区域尺度上研究杉木林生产量可为估算杉木林固碳潜力、预测其对气候变化的响应和提高经营管理水平提供科学依据。利用气象、水文、土壤及植物等方面数据,对TRIPLEX 1.6模型进行参数化,用森林资源调查样地数据对模型进行验证,模拟湖南省杉木林1991～2040年生物量与生产力动态变化、空间分布格局。结果表明:模拟值与实测值之间拟合度高(p=0.995),TRIPLEX1.6模型可应用于模拟亚热带杉木林生长和生产量的动态变化。2010～2018年湖南省杉木林生产力(NPP)为迅速增长期,此后NPP缓慢下降,2008年所有样地杉木林平均年龄为23 a,单位面积平均NPP达到最大值(8.09 t.hm-2a-1),2010～2060年间平均值为6.96 t.hm-2a-1。 Chinese fir is an excellent fast-growing timber tree species, having a planting area of 921 χ 104 hm^2 and accounting for 30.4% of plantation timber-forest area in China. Study on Chinese fir biomass with the mechanism model by regional scale can provide a scientific basis for estimating carbon sequestration potential, forecasting the effects of Chinese fir biomass on climate change, and raising the managerial skills. Therefore, the TRIPLEX model was parameterized by using the dataset of climate, hydrology, soil and vegetation, the model was validated with the simulation values of DBH and tree height collected from 702 permanent plots of Chinese fir stands, and the dynamic changes of biomass and productivity, spatial distribution pattern for Hunan in 1991 ～ 2040 were simulated. The results show that the firing degree of simulation value and the measured value were very high（0.995）, thus TRIPLEX 1.6 model can be applied to simulate the dynamic changes of growth and productivity of Chinese fir productivity is a rapid-increase stage, after that the productivity will decrease; the mean-age of all Chinese fir stands are 23-year-old, the average productivity per unit area reached the maximum value in 2008（8.09t·hm^-2a^-1）, the average value in 2010 ～ 2060 will reach 6.96 t·hm^-2a^-1.

关 键 词： 杉木林 生物量动态 模型 空间分异 气候变化

领　　域： [农业科学] [农业科学] [农业科学]