植被恢復(fù)對(duì)典型黑土表層土壤壓縮性和承載能力的影響
發(fā)布時(shí)間:2018-01-09 04:16
本文關(guān)鍵詞:植被恢復(fù)對(duì)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(xué)學(xué)報(bào)》2016年02期 論文類(lèi)型:期刊論文
更多相關(guān)文章: 植被恢復(fù) 黑土 土壤 土壤壓縮性 土壤承載能力
【摘要】:以恢復(fù)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(duì)象,采用快速固結(jié)試驗(yàn)法,對(duì)土壤孔隙比、壓縮指數(shù)、先期固結(jié)壓力等指標(biāo)進(jìn)行測(cè)試,分析植被恢復(fù)對(duì)典型黑土表層土壤壓縮性、承載能力的影響。結(jié)果表明:土壤孔隙比、壓縮指數(shù)、先期固結(jié)壓力,均隨恢復(fù)年限的增加而增加,壓縮指數(shù)、先期固結(jié)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(jié)壓力,均顯著高于耕地土壤(p0.05);隨植被恢復(fù)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(qiáng)。土壤力學(xué)性質(zhì)指標(biāo)與理化性質(zhì)之間,表現(xiàn)出顯著的相關(guān)性(p0.05);壓縮指數(shù)與土壤黏粒比例、有機(jī)質(zhì)質(zhì)量分?jǐn)?shù)之間關(guān)系更為緊密(p0.01);先期固結(jié)壓力與土壤黏粒比例呈極顯著負(fù)相關(guān)(p0.01)。植被恢復(fù)導(dǎo)致土壤有機(jī)質(zhì)質(zhì)量分?jǐn)?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(qiáng)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(xué);
【基金】:國(guó)家林業(yè)公益性行業(yè)科研專(zhuān)項(xiàng)(201404202)
【分類(lèi)號(hào)】:S714.2;S152.9
【正文快照】: 1)國(guó)家林業(yè)公益性行業(yè)科研專(zhuān)項(xiàng)(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
【二級(jí)參考文獻(xiàn)】
相關(guān)期刊論文 前2條
1 楊培嶺;羅遠(yuǎn)培;石元春;;用粒徑的重量分布表征的土壤分形特征[J];科學(xué)通報(bào);1993年20期
2 王恩Y,
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