本文關鍵詞：植被恢復對典型黑土表層土壤壓縮性和承載能力的影響　出處：《東北林業(yè)大學學報》2016年02期 　論文類型：期刊論文

  更多相關文章： 植被恢復 黑土 土壤 土壤壓縮性 土壤承載能力

【摘要】：以恢復年限分別為14、36、50 a的落葉松人工林及相鄰耕地表層土壤(0~10 cm)為研究對象,采用快速固結試驗法,對土壤孔隙比、壓縮指數(shù)、先期固結壓力等指標進行測試,分析植被恢復對典型黑土表層土壤壓縮性、承載能力的影響。結果表明:土壤孔隙比、壓縮指數(shù)、先期固結壓力,均隨恢復年限的增加而增加,壓縮指數(shù)、先期固結壓力變化范圍分別為0.231~0.399、4.2~100.0 k Pa。落葉松林地土壤壓縮指數(shù)、先期固結壓力,均顯著高于耕地土壤(p0.05);隨植被恢復年限的增加,典型黑土表層土壤壓縮性、承載能力逐漸提高,耕性有所增強。土壤力學性質指標與理化性質之間,表現(xiàn)出顯著的相關性(p0.05);壓縮指數(shù)與土壤黏粒比例、有機質質量分數(shù)之間關系更為緊密(p0.01);先期固結壓力與土壤黏粒比例呈極顯著負相關(p0.01)。植被恢復導致土壤有機質質量分數(shù)的增加;土壤密度和黏粒比例的降低,是黑土表層土壤壓縮性增加、土壤承載能力增強的重要原因。
[Abstract]:In the recovery period were larch plantation and adjacent farmland soil 14,36,50 a (0~10 cm) as the research object, using the rapid consolidation test, the soil porosity ratio, compression index and preconsolidation pressure are tested on compressibility of typical black soil surface soil vegetation recovery analysis, effects of bearing capacity. The results showed that the soil void ratio, compression index, preconsolidation pressure, increased with time increasing, the compression index, the preconsolidation pressure range were 0.231~0.399,4.2~100.0 K Pa. forest soil preconsolidation pressure, compression index, were significantly higher than that of cultivated soil (P0.05); with the increase of vegetation restoration years, soil the surface soil compressibility, improve the bearing capacity gradually, tillage increased. Between the index of mechanical properties and soil physicochemical properties showed significant correlation (P0.05) refers to the compression; The number and proportion of clay soil, the relationship between organic matter content more closely (P0.01); preconsolidation pressure and soil clay ratio showed a significant negative correlation (P0.01). Vegetation restoration resulted in increased soil organic matter content; reduce the soil density and clay ratio, soil surface soil compressibility is increased an important reason, enhance soil bearing capacity.

【作者單位】： 東北林業(yè)大學;
【基金】：國家林業(yè)公益性行業(yè)科研專項(201404202)
【分類號】：S714.2;S152.9
【正文快照】： 1)國家林業(yè)公益性行業(yè)科研專項(201404202)。wnefu@163.com。Effects of Vegetation Recovery on Topsoil Compressibility and Load Support Capacity of Typical Black Soil//HanShaojie,Wang Enheng,Luo Song,Chen Xiangwei(Northeast Forestry University,Harbin 150040,P

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相關期刊論文 前2條

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本文編號：1399956