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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Grass mulching effect on infiltration, surface runoff and soil loss of three agricultural soils in Nigeria
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Grass mulching effect on infiltration, surface runoff and soil loss of three agricultural soils in Nigeria

机译：草覆盖对尼日利亚三种农业土壤入渗，地表径流和土壤流失的影响

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Mulching the soil surface with a layer of plant residue is an effective method of conserving water and soil because it reduces surface runoff, increases infiltration of water into the soil and retard soil erosion. The effectiveness of using elephant grass (Pennisetum purpureum) as mulching material was evaluated in the laboratory using a rainfall simulator set at rainfall intensities typical of the tropics. Six soil samples, two from each of the three major soil series representing the main agricultural soils in South Western Nigeria were collected, placed on three different slopes, and mulched with different rates of the grass. The surface runoff, soil loss, and apparent cumulative infiltration were then measured under each condition. The results with elephant grass compared favorably with results from previous experiments using rice straw. Runoff and soil loss decreased with the amount of mulch used and increased with slope. Surface runoff, infiltration and soil loss had high correlations (R = 0.90, 0.89, and 0.86, respectively) with slope and mulch cover using surface response analysis. The mean surface runoff was correlated negatively with sand content, while mean soil loss was correlated positively with colloidal content (clay and organic matter) of the soil. Infiltration was increased and soil loss was reduced greatly with the highest cover. Mulching the soils with elephant grass residue may benefit late cropping (second cropping) by increasing stored soil water for use during dry weather and help to reduce erosion on sloping land. (C) 2006 Elsevier Ltd. All rights reserved.
机译：用一层植物残渣覆盖土壤表面是一种有效的水土保持方法，因为它可以减少地表径流，增加水向土壤的渗透并阻止土壤侵蚀。在实验室中使用设置为热带典型降雨强度的降雨模拟器评估了使用象草（Pennisetum purpureum）作为覆盖材料的有效性。收集了六个土壤样品，分别来自代表尼日利亚西南部主要农业土壤的三个主要土壤系列中的两个，分别置于三个不同的坡度上，并用不同比例的草覆盖。然后在每种条件下测量地表径流，土壤流失和表观累积渗透。大象草的结果与以前使用稻草的实验结果相比具有优势。径流和土壤流失量随覆盖物用量的增加而减少，随坡度增加。利用表面响应分析，地表径流，入渗和土壤流失与坡度和覆盖层高度相关（分别为R = 0.90、0.89和0.86）。平均地表径流与沙含量呈负相关，而平均土壤流失与土壤胶体含量（粘土和有机物）呈正相关。覆盖率最高时，入渗量增加，水土流失大大减少。用象草残留物覆盖土壤可以通过增加储存的土壤水分供干旱作物（第二茬）使用，以供干旱天气使用，并有助于减少坡地的侵蚀。 （C）2006 Elsevier Ltd.保留所有权利。

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