摘要
基于河北省木兰围场国有林场管理局北沟林场4hm^2天然次生林中100个采样点0—20cm、20—40cm和40—60cm的土壤养分测定分析数据，运用地统计学方法研究了土壤养分的空闻变异特征，并分析讨论了该区域土壤养分的空间分布特点。结果表明：研究区内土壤养分（有机质、全钾、全氮、全磷、速效钾和有效磷）的变异系数在0．17—0．94之间，属于中等变异程度。0—20cm速效钾的结构比为0．534，具有中等空间相关性，其余各层的土壤养分结构比都在0．900以上，具有很强的空间相关性。各土壤养分的空间相关距离为40．53—287．1m，均表现出了明显的空间分布趋势。研究结果对在华北土石山区土壤取样设计及土壤养分的空间内插和制图具有一定的指导意义。
One hundred sampling points were selected in a natural secondary forest of 4hm2 in Beigou forest farm, Mulanweichang, Hebei Province, for the determination of soil nutrients in the depth of 0 - 20cm, 20 - 40cm and 40 -60cm. Spatial variability of soil nutrients were analyzed by geostatistics approach. Spatial distribution characteristics of soil nutrients in the region were discussed. The results indicated that the coefficients of variation of soil nutrients （organic matter, total potassium, total nitrogen, total phosphorus, readily available potassium and availa- ble phosphorus） range from 0.17 to 0.94, and belong to a moderate degree of variation. The structure ratio of readily available potassium in 0 - 20cm is 0.534 with a medium spatial correlation, and the structure ratios of soil nutrients in other layers are over 0.900 with strong spatial correlations. The spatial correlation distances of soil nu- trients range between 40.53m and 287. lm, showing significant spatial distribution trends. The results may be helpful for improving the sampling design and for interpolation and mapping of soil nutrients in rocky mountain area of northern China.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2014年第6期136-142,共7页
Journal of Arid Land Resources and Environment
基金
中央高校基本科研业务费专项(TD2011-2)
国家林业局林业公益性行业科研专项(200804022A
20100400201)资助
关键词
土壤养分
空间变异
地统计学
soil nutrients
spatial variability
geostatistics
