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首页> 外文会议>2010 International conference of international conference on combating land degradation in agricultral areas. >Study on the Microbiotic soil crust physicochemical properties and the effects on Anti-Scourability in the Loess Area of Northern Shannxi Province
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Study on the Microbiotic soil crust physicochemical properties and the effects on Anti-Scourability in the Loess Area of Northern Shannxi Province

机译：陕北黄土区微生物土壤结皮的理化性质及其对抗冲性的影响

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摘要

To investigate the soil and water conservation function of microbiotic soil crust in Loess r areas, the physicochemical properties of microbiotic soil r crust samples collected in WU-Qi were analyzed. The scouring r the trough of experimental methods was used. The results r show: (1)Microbiotic soil crust can reduce the soil r pH value. (2)The average thickness of microbiotic soil crust r can reach 3.67 mm, the coverage of crust was not higher than 30%; r microbiotic soil crust composed of fine sand particles r (0.05-0.01mm) and coarse silt (0.25-0.05mm).(3) Microbiotic soil r crust had nutrients enrichment, except the available r potassium content. Cu、Cr and Ca was the important factor to the r distribution of microbiotic soil crust.(4) During the process r of scouring, sediment concentration increased with scouring r time, and decreased after microbiotic soil crust r collapsed. No crust of soil erosion is 35 times as much as the crust r covered.(5)pH value and microbiotic soil crust of sediment r runoff showed a positive correlation.(6) Microbiotic soil r crust had changed the soil sand, silt and clay content, and K value, r which can impact the soil anti-erosion ability.
机译：为了研究黄土地区微生物土壤结皮的水土保持功能，分析了吴起地区微生物土壤结皮样品的理化性质。使用了实验方法的精炼槽。结果表明：（1）微生物土壤结皮可以降低土壤pH值。 （2）微生物土壤结皮的平均厚度r可达3.67mm，结皮覆盖率不大于30％； r微生物土壤结皮由细砂粒r（0.05-0.01mm）和粗粉沙（0.25-0.05mm）组成。（3）除有效r钾含量外，微生物土壤r结皮具有养分丰富的特性。 Cu，Cr和Ca是影响微生物土壤结皮分布的重要因素。（4）在冲刷过程中，沉积物浓度随冲刷时间的延长而增加，而在微生物土壤结皮塌陷后降低。没有土壤侵蚀的地壳是覆盖的地壳的35倍。（5）pH值与沉积物r径流的微生物土壤结皮呈正相关。（6）微生物土壤结皮改变了土壤的沙，泥沙和黏土含量和K值r会影响土壤的抗侵蚀能力。

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