论文部分内容阅读
本文以趋势面分析法研究了油松针叶中营养元素浓度的空间变异.结果表明,以二维二次趋势面可以很好地模拟K、Mg、zn和灰分浓度的空间变异情况;树冠营养元素浓度不仅有垂直方向的差异,而且有水平方向的差异,这种差异表现为树冠外部向内部的逐渐变化,据此,进行油松营养诊断时,应按树冠内部、中部和外部确定采样部位.
In this paper, the spatial variability of nutrient concentrations in needles of Pinus tabulaeformis was studied by trend-surface analysis.The results showed that spatial variability of K, Mg, Zn and ash concentrations could be well simulated by two- The concentration not only has vertical difference but also horizontal difference, which shows the gradual change from the outside to the inside of the canopy. Therefore, when diagnosing Pinus tabulaeformis, the sampling sites should be determined according to the inner, middle and outer canopy.