摘要
采用野外历史草原火灾资料、野外采样调查和AQUA MODIS卫星遥感影像的方法,应用SPSS18.0软件,估算草原NPP及草原NPP对草原火的影响,结果表明:全省草原面积总体存在显著的减少趋势,年平均减少501.40 km^(2);黑龙江省草原NPP平均值为364.78±22.25 gC/m^(2)·a,存在极显著上升趋势(P<0.001),年平均增加速率为3.48 gC/m^(2)·a;黑龙江省草原火面积与NPP呈指数相关,随着草原NPP的增加,草原火面积也存在增加趋势。
In this paper,using the method of field historical grassland fire data,field sampling survey and AQUA MODIS satellite remote sensing image,and using SPSS18.0 software,the grassland NPP and the grassland NPP's impact on grassland fire were estimated.The results showed that the grassland area of the whole province had a significant decrease trend,with an average annual decrease of 501.40 km^(2).The mean value of NPP in Heilongjiang grassland was 364.78±22.25 gC/m^(2)·a,with an extremely significant increasing trend(P<0.001),and the annual mean increase rate was 3.48 gC/m^(2)·a.There was an exponential correlation between grassland fire area and NPP in Heilongjiang Province.With the increase of grassland NPP,grassland fire area also showed an increasing trend.
作者
魏云敏
孙家宝
WEI Yunmin;SUN Jiabao(Heilongjiang Forest Protection Institute,Heilongjiang Harbin 165000)
出处
《林业科技》
2023年第3期50-55,共6页
Forestry Science & Technology
基金
黑龙江省财政项目“火干扰对寒温带森林土壤碳影响的研究”(LKSB2022-2)
国家青年基金项目(31700574)。
关键词
遥感影像
草原NPP
草原火
remote sensing image
grassland NPP
grassland fire
