东莞大岭山7种林分凋落物的养分动态  

Nutrient Variability of the Litter Fall from Seven Plantation Forests in Dalingshan,Dongguan

作　　者：林观土[1] 彭彬霞 韩锡君 钟锡均[3] 徐庆华 

机构地区：[1]华南农业大学信息学院,广东广州510642 [2]东莞市国营大岭山林场,广东东莞523926 [3]广东省林业科学研究院,广东广州510520

出　　处：《华南农业大学学报》2009年第3期117-119,共3页Journal of South China Agricultural University

基　　金：华南农业大学校长基金(2007X021);广东省林业局科技专项"广东省森林生态效益监测站建设与研究"

摘　　要：应用网格法设置样地调查东莞大岭山林分凋落物的全N、全P和全K含量,利用地统计学并结合地理信息系统的空间分析功能,分析了凋落物养分空间分布特征,研究了凋落物养分的季节性变化.结果表明:全N、全P和全K的最佳拟合模型分别为球状模型、指数模型和高斯模型,其块金值与基台值之比分别为0.278、0.592和0.579,属于中等程度空间相关.A grid-system method was used to set up the plots to collect forest litters for the determination of total nitrogen, total phosphorus and total potassium. Spatial patterns of litter nutrients and their seasonal variations were investigated using geo-statistieal techniques together with the GIS-based spatial analysis function. The results showed that the best fitted model for total nitrogen, total phosphorus, and total potassium was the spherical model, exponential model and Gaussian model, respectively, and their nugget effect was 0. 278,0. 592, and 0. 579, respectively, showing medium spatial autocorrelation.

关 键 词：凋落物 养分 地统计分析 空间分析 

分 类 号：S718.5[农业科学—林学] P208[天文地球—地图制图学与地理信息工程]