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 ZHAO Yinghui,L Hongchen,ZHEN Zhen*,et al.Interpolation optimization of meteorological factors and its correlation analysis with the larch NPP in Heilongjiang Province, China[J].Journal of Nanjing Forestry University(Natural Science Edition),2018,42(03):001-9.[doi:10.3969/j.issn.1000-2006.201709002]





Interpolation optimization of meteorological factors and its correlation analysis with the larch NPP in Heilongjiang Province, China
赵颖慧吕泓辰甄 贞*李凤日魏庆彬
东北林业大学林学院,黑龙江 哈尔滨 150040
ZHAO Yinghui LÜ Hongchen ZHEN Zhen* LI Fengri WEI Qingbin
College of Forestry, Northeast Forestry University, Harbin 150040, China
混合插值法 生长季 气温 降水量 落叶松 净初级生产力(NPP) 黑龙江省
Keywords:mixed interpolation growing season temperature precipitation larch net primary productivity(NPP) Heilongjiang Province
【目的】通过比较不同插值方法模拟黑龙江省气象因子,利用最佳插值结果,探寻落叶松样地气象因子与森林植被净初级生产力(NPP)的关系,为黑龙江省落叶松林的生产经营和管理提供科学参考。【方法】以黑龙江省2010年生长季(5—9月)气象因子(日平均气温、日降水量)及1 521块落叶松林固定样地数据为数据源,分别使用反距离加权(IDW)、普通克里金(OK)、多元线性回归(MLR)和混合插值法(包括回归反距离加权(RIDW)和回归克里金(RK))5种插值方法对生长季月均气温和月均降水量进行插值及比较,以最佳插值方法得到黑龙江省2010年生长季月均气温和月均降水量空间分布。根据东北地区树种生物量异速模型估算落叶松样地单位面积森林地上生物量(AGB)和净初级生产力,并与样地气象因子进行相关性分析。【结果】5种插值方法中RK的生长季月均气温和月均降水量均方根误差(RMSE)分别为0.420和10.110,均优于其他插值方法。生长季月均气温由南至北降低的同时落叶松NPP随之降低,月均降水量自西向东增大,落叶松NPP随之升高。生长季月均气温、月均降水与NPP的Pearson相关系数分别为0.221和0.241,二者P值都小于0.01,呈极显著相关。【结论】考虑地形因子和多元回归模型结果残差的RK方法可以更好地模拟黑龙江省生长季月均气温和月均降水量。生长季落叶松NPP在经、纬度方向上分布趋势与气温、降水量相同,且落叶松NPP与生长季月均气温和月均降水量均有一定相关性,其中与降水量相关性更为明显。
Abstract: 【Objective】In this paper, we compared different interpolation methods to estimate meteorological factors in Heilongjiang Province and investigated the relationship between meteorological factors and net primary productivity(NPP)of larch using optimized interpolation result. It provided a scientific reference for the production and management of larch in Heilongjiang Province.【Method】Based on meteorological factors(average daily temperature and precipitation)during growing season( from May to September)in 2010 in Heilongjiang Province and 1 521 fixed plots data of larch forests, this study applied inverse distance weighed(IDW), ordinary Kriging(OK), multiple linear regression(MLR)and mixed interpolation(including regression inverse distance weighed(RIDW)and regression Kriging(RK))to interpolate and explored monthly average temperature and precipitation of growing season, and obtained spatial distribution maps of average monthly temperature and precipitation during growing season in 2010 by using the best interpolation method. Then, biomass allometric models of tree species of Northeastern China were applied to calculate aboveground biomass(AGB)and NPP of larch forest and the correlation with meteorological factors was analyzed. 【Results】The RMSE of average monthly temperature and precipitation of the RK during growing season were 0.420 and 10.110 respectively, which were better than the other interpolation methods. During the growing season, the NPP decreased as average monthly temperature decreased from south to north; the NPP increased as average monthly precipitation increased from west to east. The coefficient of Pearson correlation between the average temperature and NPP, and the average precipitation and NPP during the growing season was 0.221 and 0.241, respectively. Both P values were lower than 0.01, which means that they were significantly correlated. 【Conclusion】The RK method that considered terrain factors and residuals of multiple regression model could estimate average monthly temperature and precipitation during growing season in Heilongjiang Province better than the other methods did. During growing season, the NPP of larch had the same pattern as temperature and precipitation in latitude and longitude directions. The NPP of larch had some correlation with both average monthly temperature and average monthly precipitation, in which the correlation with precipitation was more obvious than the other factor.


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基金项目:中央高校基本科研业务费专项(2572016CA01) 第一作者:赵颖慧(zyinghui0925@126.com),副教授。*通信作者:甄贞(zhzhen@syr.edu),讲师。
更新日期/Last Update: 2018-06-06