河西地区土壤全氮及有机质空间变异特征分析——以张掖市甘州区为例

Characteristics of spatial distribution of soil organic matter and total nitrogen in Hexi Area——A case study in Ganzhou District of Zhangye

应用地统计学方法对甘州区土壤（0-20 cm）中全氮、有机质数据进行了分析。结果表明：土壤全氮、有机质含量比较低,存在着明显的空间分异性,表现为从中心向四周逐渐递减的趋势,应用半方差函数分析,土壤全氮和有机质在一定范围内存在空间相关性,变程分别为2.4 km和0.35 km,都在一个较小的空间尺度范围内相关;并且全氮总体上呈条带状分布,有机质呈斑块状分布,且含量的空间变异具有各向异性特征,其各自的理论模型和相应参数很好地反映了土壤有机质和全氮含量变异特征,这种变异特征受随机因素的影响较结构性因素大,具有中等的空间相关性。

Through the application of statistical methods to GanZhou soil（0～20 cm,organic nitrogen） data are analyzed.Finally indicate soil entire nitrogen,organic quality contents comparison low,existence is burning obvious space be allotted the opposite sex,be shown in order the secondary centre faces the all around gradually degressive trend,the function applying half method difference analyses,soil entire nitrogen and organic quality there exist space correlativity in inner,change Cheng into 2 respectively in certain range.And and both 4 km and 0.35 km,are related to within a less space dimension range,entire as a whole memorial of nitrogen strip banding scatters,organic quality memorial speckle form of block distribution,the contents space dissociation has the aeolotropism characteristic,very good have reflected organic quality of soil and complete it＇s respective theory model and corresponding parameter nitrogen contents mutant characteristics,this mutant characteristic bigger than structure factor,is had medium space correlativity by random factor effect.