【摘要】 对供试区分析土壤中的氨态氮和硝态氮含量,用区域化变量理论和半方差函数分析,研究结果表明不同深度土壤中氨态氮和硝态氮含量具有空间变异性,均属于中等程度变异。通过对其半方差函授进行拟合,其变异程度主要由土壤本身的空间结构引起,不同深度土壤中氨态氮和硝态氮含量的空间相关尺度不同。更多还原

【Abstract】 NH+4-N and NO-3-N in surface soil(10～15 cm) and deep soil(35～40 cm) are measured in the study area.The experimental data is analyzed by the theory of regionalized variable theory and semi-variance function.The results show that NH+4-N and NO-3-N in different depth soil has spatial variation,which belongs to middle extent variation.Through fitting the semi-variance function,it is found that the variation extent is caused by spatial structure and the space correlative scale of NH+4-N and NO-3-N in different depth soil is different.更多还原