本文選題：烘干土入滲 + 基質(zhì)域��； 參考：《土壤通報(bào)》2017年01期

【摘要】：利用室內(nèi)定水頭入滲法,觀測(cè)三峽不同森林地段烘干土的入滲性能,比較大孔隙域與基質(zhì)域烘干土入滲的差異,探究影響烘干土入滲性能的原因,評(píng)價(jià)常用入滲模型對(duì)不同屬性烘干土壤入滲過(guò)程的適宜性。結(jié)果表明:三峽庫(kù)區(qū)各森林地段基質(zhì)域A層土壤的入滲能力強(qiáng)于B(或C)層土壤,B(或C)層土的40 min累積入滲量只占到A層土的29.79%~45.07%;不同林型覆蓋下基質(zhì)域烘干土壤入滲能力相比較,溫性落葉闊葉林山地棕壤常綠落葉闊葉混交林山地黃棕壤暖性針葉林山地黃壤常綠闊葉林山地棕紅壤,溫性落葉闊葉林山地棕壤40 min的累積入滲量是常綠闊葉林山地棕紅壤的32.08~48.53倍。大孔隙域烘干土的入滲速率亦符合先下降后趨于穩(wěn)定的一般入滲規(guī)律,大孔隙域比基質(zhì)域烘干土的入滲性能更好,其40 min累積入滲量可以達(dá)到基質(zhì)域的0.99~2.95倍。三峽庫(kù)區(qū)森林烘干土的入滲能力與土壤容重和土粒密度呈極顯著負(fù)相關(guān)關(guān)系(P0.01),與土壤通氣孔隙度(0.02 mm)和有機(jī)質(zhì)含量呈極顯著正相關(guān)關(guān)系(P0.01)。方正三通用公式對(duì)于基質(zhì)域A層土和大孔隙域烘干土的入滲過(guò)程擬合效果較好,Horton方程對(duì)于基質(zhì)域B(或C)層烘干土的入滲過(guò)程有較高的擬合度。
[Abstract]:The infiltration performance of dry soil in different forest areas of the three Gorges region was observed by the method of fixed water head infiltration in laboratory. The difference of infiltration between big pore region and substrate region was compared, and the reasons influencing the infiltration performance of dry soil were explored. To evaluate the suitability of commonly used infiltration models for soil infiltration with different properties. The results showed that the infiltration capacity of A layer soil in each forest area of the three Gorges Reservoir area was stronger than that of B (or C) layer soil layer B (or C) layer soil, the cumulative infiltration capacity of B (or C) layer soil for 40 min only accounted for 29.7975% of A layer soil, and the infiltration ability of dry soil in different forest cover was compared. Temperate deciduous broad-leaved forest mountain brown soil evergreen deciduous broad-leaved mixed forest mountain yellow brown soil warm coniferous forest mountain yellow soil evergreen broad-leaved forest mountain brown red soil, The cumulative infiltration of temperate deciduous broad-leaved broad-leaved mountain brown soil for 40 min was 48.53 times that of evergreen broad-leaved forest. The infiltration rate of drying soil in macroporous domain also accords with the general infiltration law that decreases first and then tends to stable. The infiltration performance of dry-soil in macroporous domain is better than that in substrate domain, and the cumulative infiltration amount in 40 min can reach 0.99 ~ 2.95 times of that in matrix domain. The infiltration ability of forest drying soil in the three Gorges Reservoir area was negatively correlated with soil bulk density and soil particle density (P0.01), and was positively correlated with soil aeration porosity (0.02 mm) and organic matter content (P 0.01). Fangzheng three general formulas fit well the infiltration process of matrix A layer soil and macroporous dry soil. Horton equation has a higher fitting degree for B (or C) layer dry soil infiltration process.
【作者單位】： 地理過(guò)程分析與模擬湖北省重點(diǎn)實(shí)驗(yàn)室;華中師范大學(xué)城市與環(huán)境科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41001125) 湖北省自然科學(xué)基金重點(diǎn)項(xiàng)目(2015CFA141) 華中師范大學(xué)中央高�？蒲谢緲I(yè)務(wù)費(fèi)(CCNU16JCZX09)
【分類號(hào)】：S714
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本文編號(hào)：1781549