【摘要】：為探討伏牛山區(qū)坡耕地土壤物理性能的退化特征,在河南省魯山縣迎河小流域,利用激光粒度儀和土壤分形模型,比較分析了4種土地利用類型的土壤粒徑分布(PSD)及其分形特征。研究結(jié)果表明:1)土壤PSD簡(jiǎn)單分維(D_v)以喬木林地最高(2.658),坡耕地最低(2.489),多重分維(容量維D_0、信息維D_1、關(guān)聯(lián)維D_2)以喬木林地最高(0.941、0.926、0.91),坡耕地最低(0.927、0.899、0.849)。不同分形參數(shù)均表現(xiàn)為:坡耕地灌草坡地和水平梯田喬木林地;2)土壤PSD的D_v、D_0、D_1和D_2,與黏粒和粉粒體積分?jǐn)?shù)顯著正相關(guān),與砂粒體積分?jǐn)?shù)顯著負(fù)相關(guān)。因此,利用土壤PSD簡(jiǎn)單分形和多重分形維數(shù),可量化表征土壤質(zhì)地的粗細(xì)程度和非均勻性質(zhì)的差別;坡耕地土壤質(zhì)地的粗�；潭群头蔷鶆蛐悦黠@大于其他土地利用類型;土壤細(xì)粒(黏粒和粉粒)物質(zhì)流失是坡耕地土壤質(zhì)地粗粒化和非均勻程度增大的重要原因。
[Abstract]:In order to study the degradation characteristics of soil physical properties of sloping farmland in Funiu Mountain area, in Yinghe small watershed of Lushan County, Henan Province, laser particle size analyzer and soil fractal model were used. Soil particle size distribution (PSD) and fractal characteristics of four land use types were compared and analyzed. The results showed that: 1) the simple fractal dimension (Dv) of soil PSD was highest in Arbor woodland (2.658), lowest in sloping farmland (2.489), multifractal dimension (capacity dimension D0, information dimension D1, correlation dimension D2), and Arbor woodland was the highest (0.941 ~ 0.926 ~ 0.91), sloping farmland was the lowest (0.927 0.899 / 0 ~ 0.849). The different fractal parameters were as follows: slope land and horizontal terrace trees and woodlands; (2) the PSD of soil DVX D _ (0) D _ (1) and D _ (2) had a significant positive correlation with the volume fraction of clay and silt particles, and a significant negative correlation with the volume fraction of sand particles. Therefore, simple fractal and multifractal dimensions of soil PSD can be used to quantify the difference between soil texture thickness and non-uniformity, and the coarse graining degree and non-uniformity of soil texture in sloping farmland are obviously higher than those in other land use types. The loss of soil fine particles (clay and silt) is an important reason for the increase of coarse graining and uneven degree of soil texture in sloping farmland.
【作者單位】： 山東省土壤侵蝕與生態(tài)修復(fù)重點(diǎn)實(shí)驗(yàn)室/山東農(nóng)業(yè)大學(xué)林學(xué)院;水利部水利水電規(guī)劃設(shè)計(jì)總院;山東省水文局;
【基金】：淮河水利委員會(huì)水土保持管理項(xiàng)目“淮河流域國(guó)家水土保持重點(diǎn)工程區(qū)水土流失存在問題及防治對(duì)策”(HWSBC2015002)
【分類號(hào)】：S157

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