不同植被下水土流失研究

The Study on the Water and Soil Loss in Different Vegetations

为了探讨不同植被对水土流失的影响,对桉树林、龙眼树、混交林3种植被下的水土流失进行了研究。结果表明:3种不同植被下的水流失量、土壤流失量及土壤养分流失量均有明显差异。3种不同植被下水流失量、土壤流失量及土壤养分流失量均表现为:桉树林>龙眼树>混交林。其中,龙眼树水分、土壤、土壤速效氮、磷、钾、土壤有机质流失量分别比桉树林减少了4.43%、96.51%、95.29%、96.20%、93.00%、96.09%;混交林分别比桉树林减少了5.07%、98.79%、98.67%、98.74%、98.39%、98.74%。水、土壤及土壤养分流失量除了在龙眼树与混交林间差异不显著外,在其他植被类型间均呈显著差异。由此可见,混交林保持水土的作用最好,其次是龙眼树,再次是桉树。

To investigate the impact of different vegetation on soil erosion,the soil erosions under three different vegetation of the eucalyptus forest,longan tree,mixed forest were studied in this test.The results showed that： the amount of the water,soil and soil nutrient loss ranked as follows： mountain ash forest＆gt; orchard ＆gt;mixed fores.Compared with mountain ash forest,the orchard whose water,soil,available nitrogen,phosphorus potassium and organic matter in soil losses reduced by 4.43%,96.51%,95.29%,96.20%,93.00%,96.09%;and in the mixed forest,it reduced by 5.07%,98.79%,98.67%,98.74%,98.39%,98.74%.So,the role of conserving soil and water of the mixed forest was the strongest,the second was the longan tree,and the third was the eucalyptus.