摘要
应用距离反比插值法进行杉木种子涩籽率的空间插值,并提出一种改进的距离反比插值法(MID),其包含了距离反比法(ID)和距离平方反比法(IDS)。根据福建省25个杉木种子产地的涩籽率观察值,建立了杉木种子涩籽率的改进距离反比插值模型。改进距离反比插值法经交叉验证,其平均误差及平均误差平方的平方根均较距离反比法和距离平方反比法更小,具有较高的精度,平均精度达88.91%,可应用于杉木种子涩籽的空间内插。这不仅为杉木种子涩籽的空间插值提供了一种新方法,而且为地理信息系统(Geographicinformationsystem,GIS)辅助的杉木种子涩籽区域分布与流行趋势研究提供了理论依据,为福建省杉木种子园的合理布局与优化奠定基础。
The inverse distance method (ID) was used to interpolate the sterile seed rate of Cunninghamia lanceolata distributed in various sites in Fujian Province in order to establish rational seed production bases. A modified inverse distance method (MID) is presented which includes ID and inverse distance squares method (IDS). Based on sterile seeds collected from 25 sites, models of MID, ID and IDS were built. The results of cross-validation for the three methods showed that mean error and root-mean-square interpolation error in MID were lowest, and the average accuracy being 88.91%. MID could be useful in the study of epidemic trend of C. lanceolata sterile seeds and its distribution, as well as for establishing seed production base in optimum habitats.
出处
《热带亚热带植物学报》
CAS
CSCD
北大核心
2004年第4期318-322,共5页
Journal of Tropical and Subtropical Botany
基金
中国博士后科研基金
福建省科技厅重大项目(2001F007
2001Z025)
福建省自然科学基金(B0110026)资助者
关键词
空间插值
距离反比法
杉木
涩籽
地理分布
Spatial interpolation
Inverse distance method
Cunninghamia lanceolata
Sterile seeds
GeographicalDistribution
