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首页> 外文期刊>Ecological research >Soil And Water Erosion Under Different Plant Speciesin A Semiarid River Valley, Sw China: The Effects Of Plant Morphology
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Soil And Water Erosion Under Different Plant Speciesin A Semiarid River Valley, Sw China: The Effects Of Plant Morphology

机译：中国西南半干旱河流域不同植物物种的水土流失：植物形态学的影响

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摘要

The small-scale effects of plant morphology in improving soil quality and reducing runoff and soil loss have remained unclear, especially in some arid environments with sparse vegetation. We selected three representative species with contrasting morphologies (Artemisia gmelinii; Ajania potaninii; Pulicaria chrysantha) to examine the effects of plant morphology on soil quality, runoff, and soil loss in the dry-warm river valley of the upper reach of Minjiang River, SW China. Runoff events were monitored from July through October 2006 using runoff plots on a micro scale (＜ 40 × 40 cm~2) on a south-facing slope. The observation duration for rainfall and runoff events can be divided into two stages. Higher runoff depth, but lower soil loss per event occurred at the second stage as compared with the first stage due to the differences in rainfall, plant, and soil surface characteristics. The two herbs, A. gmelinii and P. chrysantha, had greater improvements on soil quality yielding high soil nutrient content and low soil compactness, while the effectiveness of the small shrub, A. potaninii, was minimal. Relative to bare surface (control treatment), the effectiveness of reducing runoff depth per event was 64.9, 66.6 and 38.0%, and reducing soil loss 65.5, 59.3 and 69.9% for A. gmelinii, A. potaninii, and P. chrysantha, respectively. All three plant species can improve soil quality and reduce runoff and soil loss, but their effects vary, which implies that plant morphology has to be considered while selecting species for ecosystem restoration.
机译：尚不清楚植物形态在改善土壤质量，减少径流和土壤流失方面的小规模影响，尤其是在一些植被稀疏的干旱环境中。我们选择了三个具有相反形态的代表性物种（青蒿，;木，普利桑），以研究植物形态对SW江上游干热河谷土壤质量，径流和土壤流失的影响。中国。在2006年7月至2006年10月期间，使用面向南坡的微型径流图（＜40×40 cm〜2）监测径流事件。降雨和径流事件的观测持续时间可分为两个阶段。与第一阶段相比，由于降雨，植物和土壤表面特征的差异，第二阶段发生的径流深度较高，但每事件的土壤流失较少。两种草药，A。gmelinii和P. chrysantha，在土壤质量方面有较大改善，产生了高的土壤养分含量和低的土壤致密性，而小的灌木A. potaninii的功效却很小。相对于裸露的表面（对照处理），降低每事件径流深度的效率分别为A. gmelinii，A。potaninii和P. chrysantha减少64.9％，66.6％和38.0％，减少土壤流失65.5％，59.3％和69.9％。 。这三种植物都可以改善土壤质量，减少径流和土壤流失，但是它们的影响各不相同，这意味着在选择用于生态系统恢复的物种时必须考虑植物形态。

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