太湖地区水稻土磷素空间变异特征的研究  

Spatial Variability of Phosphorus in Paddy Soils in Taihu Lake Area

作　　者：朱红霞[1,2] 陈效民[1] 杜臻杰[1] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095 [2]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《土壤通报》2010年第3期573-576,共4页Chinese Journal of Soil Science

基　　金：国家自然科学基金项目"硝态氮在含有大孔隙的农田土壤中运移机理及数学模拟(40371055)"资助

摘　　要：采用经典统计学与地统计学相结合的方法,对太湖地区典型的水稻土（乌栅土）进行网格法分层（0~15cm、15~28cm、28~42cm）取样,研究了田间尺度下土壤全磷和速效磷的空间变异特征。结果表明全磷、速效磷含量随深度的增加而减小。各层pH和速效磷含量存在极显著的正相关关系,pH和全磷含量存在负相关关系。各土层速效磷半方差变异函数的C0（/C0＋C）均在0.25~0.75之间,具有中等的空间自相关,且三层土壤速效磷的含量的分布格局有一定相似性。The spatial variability of soil total phosphorus and Olsen phosphorus at the depths of 0 - 15 cm, 15 - 28 cm and 28 - 42 cm of paddy soils in Taihu Lake area were examined by geoststistics in comparison with traditional statistics. The results showed that both total phosphorus and Olsen phosphorus decreased with the increase of the depth. There were a significant positive correlation between pH and Olsen phosphorus and a negative correlation between pH and total phosphorus. The variance C0 / （C0 ＋ C） in the semi- variable function of Olsen phosphorus was in the range of 0.25 - 0.75, indicating an intermediate spatial correlation, and the distribution patterns of Olsen phosphorus at three depths were similar.

关 键 词：土壤磷素 半方差分析 空间变异 

分 类 号：S158.2[农业科学—土壤学]