Organic matter contribution to soil fertility improvement and maintenance in red Alder ( Alnus rubra ) silvopastoral systems
作者： Ronnie M. Mmolotsi , Zewge Teklehaimanot
DOI: 10.1007/S11676-008-0008-5
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摘要: An investigation was conducted to quantify fine roots and nodules over the four seasons in forestry agroforestry alder (Alnus rubra) stands North Wales. Soil samples collected each season were excavated at three sampling points (0.30 m, 0.57 m 1.00 distance from base of tree) nine trees plots. Result showed that density live root had significant differences between treatments (P < 0.001). The mean weight 0.27±0.01 kg·m−3 0.54±0.03 kg·m−3, respectively. Weight dead system remained constant throughout year. also significantly different 0.01) systems. nodule both year distances. densities 0.09±0.03 0.05±0.03 0.08±0.02 0.03±0.01 plots,
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