呂梁方山不同土地利用類型土壤入滲性能對比研究
發(fā)布時間：2018-10-23 16:28
【摘要】：本試驗針對呂梁方山地區(qū)十二種土地利用類型采用雙環(huán)法對其土壤入滲性能進(jìn)行探究。對不同土地利用類型土壤的基本物理性質(zhì)進(jìn)行分析,討論不同土壤深度下土壤容重和土壤初始含水率的變化規(guī)律,進(jìn)而比較分析十二種土地利用類型、四種喬木林地之間以及四種農(nóng)耕地之間的土壤入滲速率隨入滲時間的變化規(guī)律,并通過三種經(jīng)驗?zāi)Ｐ?Kostiakov經(jīng)驗公式、通用經(jīng)驗公式、Horton經(jīng)驗公式)對十二種土地利用類型的土壤入滲過程曲線進(jìn)行擬合回歸分析。試驗結(jié)果表明：(1)除路面外其他五種土地利用類型的土壤容重隨著土壤深度的增大呈波動性增長,浮動范圍在1.0-1.5g/cm3之間；而路面的土壤容重則隨土壤深度的增大逐漸降低,其表層土壤容重約是其他五種下墊面的1.5倍。(2)隨著土壤深度的增大,各土地利用類型的初始含水率呈緩慢增大的趨勢,且相互關(guān)系表現(xiàn)為：農(nóng)耕地撂荒地喬木林地荒草地裸地路面。(3)十二種土地利用類型的土壤入滲速率均表現(xiàn)為在滲潤階段驟降,滲漏階段緩慢降低,隨后逐漸趨于穩(wěn)定。且初始入滲速率在1.23-17.53mm/min范圍內(nèi),表現(xiàn)為：荒草地向日葵地槐樹林地撂荒地谷子地黍子地裸地油松林地土豆地榆樹林地核桃林地路面；穩(wěn)定入滲速率差異較小,表現(xiàn)為：谷子地撂荒地向日葵地土豆地黍子地榆樹林地槐樹林地荒草地核桃林地油松林地裸地路面。(4)十二種土地利用類型土壤的入滲試驗過程中,多數(shù)經(jīng)Horton經(jīng)驗公式的擬合結(jié)果較好,另外路面、裸地經(jīng)Kostiakov公式的擬合結(jié)果較好,槐樹林地和谷子地經(jīng)通用經(jīng)驗公式的擬合度在0.8左右,油松林地的擬合結(jié)果在三種經(jīng)驗公式模型下都很好。所以,在干旱的黃土丘陵溝壑區(qū),Horton經(jīng)驗公式更適合于本區(qū)域的土壤入滲研究。
[Abstract]:In this experiment, twelve land use types in Fangshan area of Lv Liang were studied by double-ring method. The basic physical properties of different land use types were analyzed, and the changes of soil bulk density and soil initial moisture content under different soil depths were discussed, and then twelve types of land use were compared and analyzed. The change of soil infiltration rate with infiltration time between four kinds of tree forest land and four kinds of agricultural land, and through three kinds of empirical models (Kostiakov empirical formula), General empirical formula and Horton empirical formula) fitting regression analysis of soil infiltration process curve of 12 land use types. The results showed that: (1) the soil bulk density of the other five land use types except pavement increased with the increase of soil depth, and the floating range was between 1.0-1.5g/cm3, while the soil bulk density of pavement gradually decreased with the increase of soil depth. The bulk density of the surface soil is about 1.5 times that of the other five underlying surfaces. (2) with the increase of soil depth, the initial moisture content of each land use type increases slowly. The relationship between the soil infiltration rate of 12 types of land use showed that the infiltration rate of the 12 land use types decreased sharply in the infiltration stage, decreased slowly in the seepage stage, and then tended to stabilize gradually, and the relationship was as follows: (1) the soil infiltration rate of the 12 types of land use decreased sharply, then decreased slowly in the infiltration stage, and then tended to stabilize gradually. The initial infiltration rate was in the range of 1.23-17.53mm/min, which was shown as follows: in the waste grassland, sunflower land, Sophora japonica forest land, abandoned millet field, bare field, Pinus tabulaeformis forest land, potato forest land, elm forest land, walnut forest, and the stable infiltration rate had little difference. The results were as follows: sunflower field, potato field, elm forest, forest land, wild grassland, walnut forest, pine forest, bare land pavement. (4) during the infiltration experiment of 12 kinds of land use type soil, Most of the fitting results by Horton empirical formula are better, in addition, the fitting result of bare land by Kostiakov formula is better, and the fitting degree of common empirical formula of Sophora acacia forest land and millet is about 0. 8. The fitting results of Pinus tabulaeformis forest land are very good under three kinds of empirical formula models. Therefore, in the arid loess hilly and gully region, Horton empirical formula is more suitable for the study of soil infiltration in this region.
【學(xué)位授予單位】：山西農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S152.7
本文編號：2289822
[Abstract]:In this experiment, twelve land use types in Fangshan area of Lv Liang were studied by double-ring method. The basic physical properties of different land use types were analyzed, and the changes of soil bulk density and soil initial moisture content under different soil depths were discussed, and then twelve types of land use were compared and analyzed. The change of soil infiltration rate with infiltration time between four kinds of tree forest land and four kinds of agricultural land, and through three kinds of empirical models (Kostiakov empirical formula), General empirical formula and Horton empirical formula) fitting regression analysis of soil infiltration process curve of 12 land use types. The results showed that: (1) the soil bulk density of the other five land use types except pavement increased with the increase of soil depth, and the floating range was between 1.0-1.5g/cm3, while the soil bulk density of pavement gradually decreased with the increase of soil depth. The bulk density of the surface soil is about 1.5 times that of the other five underlying surfaces. (2) with the increase of soil depth, the initial moisture content of each land use type increases slowly. The relationship between the soil infiltration rate of 12 types of land use showed that the infiltration rate of the 12 land use types decreased sharply in the infiltration stage, decreased slowly in the seepage stage, and then tended to stabilize gradually, and the relationship was as follows: (1) the soil infiltration rate of the 12 types of land use decreased sharply, then decreased slowly in the infiltration stage, and then tended to stabilize gradually. The initial infiltration rate was in the range of 1.23-17.53mm/min, which was shown as follows: in the waste grassland, sunflower land, Sophora japonica forest land, abandoned millet field, bare field, Pinus tabulaeformis forest land, potato forest land, elm forest land, walnut forest, and the stable infiltration rate had little difference. The results were as follows: sunflower field, potato field, elm forest, forest land, wild grassland, walnut forest, pine forest, bare land pavement. (4) during the infiltration experiment of 12 kinds of land use type soil, Most of the fitting results by Horton empirical formula are better, in addition, the fitting result of bare land by Kostiakov formula is better, and the fitting degree of common empirical formula of Sophora acacia forest land and millet is about 0. 8. The fitting results of Pinus tabulaeformis forest land are very good under three kinds of empirical formula models. Therefore, in the arid loess hilly and gully region, Horton empirical formula is more suitable for the study of soil infiltration in this region.
【學(xué)位授予單位】：山西農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S152.7
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，本文編號：2289822
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