本文關(guān)鍵詞： 高潛水位礦區(qū) 復(fù)墾土壤 復(fù)墾方式 土壤熱導(dǎo)率　出處：《水土保持學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：以東部高潛水位采煤塌陷復(fù)墾耕地為研究對象,研究挖深墊淺復(fù)墾、充填復(fù)墾、預(yù)復(fù)墾3種復(fù)墾方式下土壤熱導(dǎo)率的分布及原因。在3種復(fù)墾方式典型樣地上開挖剖面,分別取0—20,20—40,40—60cm土層土樣,經(jīng)實(shí)驗(yàn)分析觀測土壤熱導(dǎo)率及相關(guān)物理指標(biāo)。結(jié)果表明:(1)復(fù)墾方式、剖面層次和二者交互作用均是使熱導(dǎo)率產(chǎn)生顯著差別的因素(p0.01),對土壤熱導(dǎo)率總體變異的貢獻(xiàn)率分別為86.8%,89.6%,71.9%;(2)土壤熱導(dǎo)率隨土壤剖面深度增加呈先增加后降低的""型變化趨勢;(3)復(fù)墾可以顯著(p0.05)影響土壤熱導(dǎo)率大小,并增加其在不同剖面層次上分布的差異;(4)在含水量和溫度差異不大的條件下,土壤容重在1.205~1.593g/cm3時,砂粒含量為影響熱導(dǎo)率的主要因素,當(dāng)土壤容重在1.604~1.813g/cm3時,容重為影響熱導(dǎo)率的主要因素。與未塌陷耕地相比,復(fù)墾土壤熱導(dǎo)率偏低,在土層間分布差異性增加,因此應(yīng)綜合考慮容重和質(zhì)地,從降低土壤容重的角度入手,改良復(fù)墾土壤熱導(dǎo)率。
[Abstract]:Taking the coal mining collapse of the eastern part of the area as the research object, this paper studies the shallow reclamation and filling reclamation of the deep submersible. The distribution and cause of soil thermal conductivity under three kinds of pre-reclamation methods. The soil samples of 0-20 ~ (20) ~ (40) ~ (40) ~ (40) cm were taken from the typical ground excavation section of three different reclamation methods. The soil thermal conductivity and related physical indexes were observed through experimental analysis. The results showed that the reclamation mode, the level of section and the interaction between them were all the factors that caused the significant difference in thermal conductivity (p 0.01). The contribution rate to the total variation of soil thermal conductivity was 86.8% and 89.6%, respectively. (2) the soil thermal conductivity increased firstly and then decreased with the increase of soil depth. (3) Reclamation can significantly affect soil thermal conductivity and increase its distribution at different profile levels. (4) when the soil bulk density was 1.205 ~ 1.593g / cm ~ 3, the sand content was the main factor affecting the thermal conductivity under the condition of little difference between water content and temperature. When the bulk density of the soil was 1.604 ~ 1.813g / cm ~ 3, the bulk density was the main factor affecting the thermal conductivity. Compared with the uncollapsed cultivated land, the thermal conductivity of the reclaimed soil was lower, and the difference of soil distribution was increased. Therefore, comprehensive consideration should be given to bulk density and texture to improve the thermal conductivity of reclaimed soil from the point of view of reducing soil bulk density.
【作者單位】： 山東農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41171425)
【分類號】：S152
【正文快照】： 從2000年起,國家每年投入數(shù)十億元進(jìn)行采煤塌陷耕地復(fù)墾工作[1],這對保護(hù)我國耕地?cái)?shù)量和糧食安全有重要意義。但復(fù)墾耕地質(zhì)量偏低目前仍是棘手且嚴(yán)峻的問題[2-4],因此復(fù)墾耕地土壤質(zhì)量引起越來越多的學(xué)者的重視。國內(nèi)外學(xué)者在復(fù)墾土壤質(zhì)量研究方面取得巨大成就。王平等[5]在山

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