【摘要】：對2015年所采集的0~20 cm、20~40 cm土壤水樣品和對應(yīng)的土壤樣品進(jìn)行了測試分析,運(yùn)用灰度關(guān)聯(lián)和典范對應(yīng)分析的方法研究了巖溶峰叢山區(qū)土壤水的地球化學(xué)特征及其與土壤環(huán)境條件的關(guān)系。結(jié)果表明:巖溶峰叢山區(qū)土壤水地球化學(xué)性質(zhì)及其對應(yīng)的土壤環(huán)境指標(biāo)均存在不同程度的空間異質(zhì)性,其中土壤水和土壤中的p H值變異系數(shù)在2.48%~10.44%,變異最小;除了鎂離子和氯離子,土壤水的其他地球化學(xué)指標(biāo)的變異系數(shù)均表現(xiàn)為0~20 cm大于20~40 cm,20~40 cm土壤水地球化學(xué)性質(zhì)更為穩(wěn)定。土壤水的HCO-3、Ca2+、SO2-4濃度是影響土壤水地球化學(xué)特征的主要因子,且HCO-3起到主導(dǎo)作用。典范對應(yīng)分析結(jié)果顯示,不同的土壤水地球化學(xué)性質(zhì)與土壤環(huán)境因子關(guān)聯(lián)性差異明顯,影響土壤水地球化學(xué)特征的主要土壤環(huán)境因子中的全鉀含量、交換性鎂含量、有效鋅含量、0.2~2.0 mm粒徑和0.002~0.020 mm粒徑的土壤顆粒等因子對土壤水中的Mg2+濃度、HCO-3濃度、p H值影響較大,有效銅含量、胡敏酸含量、胡敏素含量主要影響土壤水中Na+濃度、K+濃度,而速效鉀含量、土壤含水率、小于0.002 mm粒徑機(jī)械組成等土壤因子則主要是通過Na+濃度、K+濃度、Cl-濃度、SO2-4濃度等指標(biāo)影響土壤水的地球化學(xué)特征。
[Abstract]:The 0 / 20 cm,20~40 cm soil water samples collected in 2015 and the corresponding soil samples were tested and analyzed. The geochemical characteristics of soil water in karst peak cluster mountain area and its relationship with soil environmental conditions were studied by means of gray-scale correlation and canonical correspondence analysis. The results showed that the geochemical properties of soil water and its corresponding soil environmental indexes existed spatial heterogeneity in different degrees. The coefficient of variation of pH value in soil water and soil was 2.48% ~ 10.44%, and the variation was the least. Except for magnesium and chloride ions, the coefficient of variation of other geochemical indexes of soil water shows that the geochemical properties of soil water are more stable than that of 0 / 20 cm and 20 / 40 cm,20~40 cm. The concentration of HCO-3,Ca2 and SO2-4 in soil water is the main factor affecting the geochemical characteristics of soil water, and HCO-3 plays a leading role. The results of canonical correspondence analysis showed that the correlation between different soil water geochemical properties and soil environmental factors was significant, and the total potassium and exchangeable magnesium contents in the main soil environmental factors affecting soil water geochemical characteristics were significantly different. The available zinc content, 0.2 ~ 2.0 mm particle size and 0.002 ~ 0.020 mm soil particle size had significant effects on the Mg2 concentration, HCO-3 concentration, p H value, available copper content and humic acid content in soil water, and the content of available copper and humic acid in soil water. The content of humin mainly affected the concentration of Na and K in soil water, while the content of available potassium, the content of soil moisture and the mechanical composition of particle size less than 0.002 mm were mainly influenced by the concentration of Na, the concentration of K, the concentration of Cl-, and so on. The geochemical characteristics of soil water were influenced by SO2-4 concentration and other indexes.
【作者單位】： 西南大學(xué)資源環(huán)境學(xué)院;中國地質(zhì)科學(xué)院巖溶地質(zhì)研究所;
【基金】：國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFC0502402) 國家自然科學(xué)基金項(xiàng)目(41502257) 中國地質(zhì)大調(diào)查項(xiàng)目(DD20160324) 中國地質(zhì)科學(xué)院基本科研業(yè)務(wù)費(fèi)項(xiàng)目(2017026)
【分類號(hào)】：S153
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本文編號(hào)：2440011