【摘要】 对2002年3月袭击北京的强沙尘暴降尘的物理、化学性质进行了研究,结果表明:强沙尘暴降尘给北京土壤带来了改善土壤物理性质的大量粉砂粒,也带来了可作为天然有效化学肥料的大量有效养分和交换性离子,丰富了北京土壤的有机质、全N、大量元素养分和微量元素养分,提高了北京土壤的潜在肥力;强沙尘暴还给北京土壤带来了大量可溶性盐分和重金属微量元素污染物,影响了北京土壤环境的质量。更多还原

【Abstract】 The effects of physical properties and chemical properties of falling dust of dust storms on Beijing soils were studied and discussed.The results indicated that:The positive effects on Beijing soils are they could increase the mass amounts of silts,available nutrient,exchangeable cation,organic matter,total nitrogen,macroelement nutrients,and microelement nutrients.And they could promote the soil fertility of Beijing.The negative effects on Beijing soils are they could increase the mass amounts of soluble salt and microelements heavy metal pollution.So it could influence the soil environment quality in Beijing.更多还原