One of the most important features

One of the most important features that is neglected in many soil erosion studies in Africa is the monitoring of changes to the soil during the progress of the experiment. Objectives of this study were therefore to monitor runoff, soil loss, and enrichments of eroded soil material and to assess the effect of cumulative soil loss on soil chemical properties of an Alfisol in one of the high-potential areas of Central Kenya highlands.

Runoff, soil loss, and enrichments of eroded sediments were measured on newly opened ground from 1991 to 1992. Annual rainfall was 948 and 1125 mm for 1991 and 1992, respectively. Soil loss ranged from 0.8 to 247.3 t ha−1, and runoff ranged from 1 to 89 mm. No significant correlations were observed between enrichment ratios (ER) and soil loss. The ER were ≥ 1 and sediments were mostly enriched with P and Na. The P and Na concentrations were 4 to 10 and 2 to 3 times the source material, respectively. Sediment from the plots was 247 to 936% richer in P than the soil from which it originated. Changes in soil pH, percentage organic C, and percentage total N following erosion were significantly correlated with cumulative soil loss (r values of 0.77, 0.59, and 0.71, respectively, n = 20). The data indicated that nutrient loss due to erosion is one of the major causes of soil fertility depletion of Kenyan soils.

結果 (中文) 1:

忽略在非洲的许多土壤侵蚀研究中的最重要的特征之一是实验过程中监测到土壤的变化。因此，这项研究的目标是来监视径流、 水土流失和土壤侵蚀的物质富集和评估影响的累积水土流失对土壤化学性状的淋溶土在肯尼亚中部高地的高潜力的地区之一。径流、 土壤流失和侵蚀沉积物富集测定在新开地上从 1991 年至 1992 年。年降雨量 948 及 1125年毫米为 1991 年和 1992 年，分别为。从 0.8 ～ 247.3 t ha−1，水土流失和径流 1 ～ 89 毫米。没有显著的相关关系观察之间浓缩比率 （ER） 和水土流失。ER ≥ 1 和沉积物被大多富含磷、 钠。P 和钠浓度分别为 9:56 上午和 2 至 3 倍的素材。情节沉积物为 247 至 936 %p 比它发源的土壤。土壤 ph 值，百分比变化有机 C 和 N 后侵蚀呈显著正相关，与累积的水土流失的百分比总 (0.77、 0.59，和 0.71，r 值分别，n = 20）。数据表明由于侵蚀养分流失是肯尼亚土土壤肥力枯竭的主要原因之一。

結果 (中文) 3:

一种是在非洲的许多土壤侵蚀研究中被忽略了最重要的特征是对土壤变化的监测实验过程中。这项研究的目标是因此监测径流，土壤流失，和富集土壤侵蚀的材料和评估在肯尼亚中部的高原，高潜力地区的淋溶土土壤化学性质的土壤累积损失的影响。

径流，土壤流失和侵蚀的沉积物，富集了新开地从1991到1992的测量。年降水量为948毫米和1125毫米的1991和1992，分别为。土壤流失的范围从0.8到247.3吨公顷−1，径1～89毫米。没有显着的相关性之间的富集率（ER）和土壤流失。二是≥1和沉积物是富含磷和钠。P和Na的浓度分别为4至10和2至3倍的源材料，分别。从图247到936%更丰富的沉积物磷的土壤比从它的起源。土壤pH值的变化率，有机碳，全氮和百分比以下侵蚀与土壤累积损失显著相关（r值为0.77，0.59，和0.71，分别，n = 20）。数据表明，营养损失由于侵蚀是一对肯尼亚土壤土壤肥力耗竭的主要原因。