【作者】 薛亚锋； 周明耀； 徐英； 张凤翔； 周春林；

【Author】 Xue Yafeng,Zhou Mingyao,Xu Ying,Zhou Chunlin (Coll of Hydr Sci & Engin, Yangzhou University, Yangzhou 225009 China)

【机构】 扬州大学水利科学与工程学院；

【摘要】 以南方地区面积为2500m2的麦作农田为研究区域,采用5m×5m网格法选取了100个观测点取样,测定0～15cm耕层土壤的有机质含量。在一定置信水平和估值精度条件下,确定了合理的取样数目。探讨了有机质含量的空间结构特征,并绘制了空间分布图。结果表明:土壤有机质表现为中等的空间自相关性,半方差函数符合球状模型,有机质含量在空间呈现一定的变化规律。本研究对于了解田间土壤肥力状况,实施精确农业具有重要意义。更多还原

【Abstract】 one hundred observing points by grid of 5m×5m were made in field 2500m2,Soil samples were obtained under large of 0～15cm.Organic matter was measured. this paper discuss the spatial variability of soil organic matter, also estabilish its semi-sphere model and protract the distributing plot.The results showed that the spatialcorrelation of soil organic matter at this large scale was middling dependent , and the semi-variograms of soil organic matter is best fitted by exponential model , in the space of the field organic matter has a change rule.The research is of grest importance to the realize of the fertility of the field,and it will support the precision farming.更多还原