摘要
选取新疆西天山为监测区,建立云杉林生物量遥感模型。基于遥感和地面调查数据提取西天山不同年龄阶段云杉林信息,对西天山云杉林生物量进行计算分析,对比分析1986、1996及2007年3期森林生物量监测数据,对西天山云杉林生物量的时空分布变化进行评价分析。研究表明:20年间西天山云杉林总体单位面积生物量为142.73t·hm-2,全林区云杉林生物量的动态变化呈现出前期(1986—1996年)减少、后期(1996—2007年)增加、总体略有下降的特点。1986年西天山云杉林的单位面积生物量最高为143.165t.hm-2,1996年下降到141.875t·hm-2,2007年又恢复到143.15t·hm-2。1986—2007年20年间,西天山云杉林面积减少了1.9%,生物总量减少了1.92%。1986—1996年间,西天山云杉林面积减少了2.88%,生物总量减少了3.77%。国家天然林保护工程实施后,西天山林区的天然森林资源得以恢复,1996—2007年西天山云杉林面积增加了1%,生物总量增加了1.91%。就不同区域云杉林生物量动态变化而言,喀什河流域云杉林总体单位面积生物量最高,随后依次为巩乃斯河流域、特克斯河流域及其他流域。
A remote sensing model of Picea schrenkiana forest biomass was established in the West Tianshan Mountain region of Xinjiang as the monitoring area. P. schrenkiana forest volume/biomass of each age class was analyzed based on multi-period remote sensing and forest resource survey data. By extracting the information from RS and forest resource survey data and comparing biomass monitoring data in 1986, 1996 and 2007, the authors evaluated the spatial distributing changes of the forest biomass. The results showed that the total forest biomass per unit area decreased by 1.9% during the past 20 years. In 1986, the P. schrenkiana biomass per unit area in the West Tianshan Mountain region reached to 143.165 t· hm^-2, decreased to 141.875 t·hm^-2 in 1996 and then increased to 143.15 t·hm^-2 in 2007. Between 1986 and 1996, the forest area reduced by 2.88 % and the total biomass reduced by 3.77 %. After ten years, along with the implement of the national natural forest protection project, the natural forest resources in the West Tianshan Mountain region had recovered, as a result, the forest area increased by 1% and the total biomass increased by 1.91 %. As to dynamic changes of forest biomass in different regions, P. schrenkiana forest biomass per unit area in Kashi River Basin was the highest, followed by Gongnaisi River Basin, Tekesi River Basin and other river basins. In generval, the dynamic changes of P. schrenkiana forest biomass in the whole forest region during the period presented the following characteristics： decreasing in （1986-1996）, increasing in （1996-2007） and slightly reducing in the entire period.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2008年第10期14-19,共6页
Scientia Silvae Sinicae
基金
国防科技工业民用专项科研技术研究项目(2006A01A0200)
国家“十一五”科技支撑计划项目(2007BAC15B07)
关键词
云杉林
生物量
遥感模型
动态监测
西天山
Picea schrenkiana forest
biomass
remote sensing model
dynamic monitoring
West Tianshan Mountain region
