本文選題：石漠化 + 土壤理化性質(zhì)　； 參考：《水土保持學(xué)報(bào)》2017年04期

【摘要】：為揭示喀斯特地區(qū)不同石漠化程度土壤理化性質(zhì)特征及其影響機(jī)制,以貴州畢節(jié)石漠化地區(qū)土壤為研究對(duì)象,在雨季前、中、后對(duì)潛在、輕度、中度、強(qiáng)度石漠化程度的土壤進(jìn)行了為期4年的監(jiān)測(cè),分析了不同石漠化程度土壤理化性質(zhì)及其各項(xiàng)指標(biāo)之間的相關(guān)性特征。結(jié)果表明:同一石漠化程度下,土壤有機(jī)質(zhì)、全磷、有效磷、全氮和水解氮含量表現(xiàn)為雨季中雨季后雨季前。隨著石漠化程度的加深,土壤田間持水量、毛管持水量、毛管孔隙度和總孔隙度升高,全磷、有效磷和有機(jī)質(zhì)含量減少。與潛在石漠化程度相比,輕度、中度和強(qiáng)度石漠化程度的土壤全氮含量分別增加5.6%,20.9%,26.6%,水解氮含量分別增加3.5%,18.3%,36.2%,全鉀含量分別增加15.8%,30%,46.3%,速效鉀含量分別增加3.9%,11.3%,16.5%。相關(guān)性分析結(jié)果顯示,土壤有機(jī)質(zhì)、全磷、全氮含量、土壤容重、總孔隙度、毛管持水量之間相關(guān)性顯著(p0.05),其中土壤有機(jī)質(zhì)含量、全氮含量、容重、總孔隙度間相關(guān)性極顯著(p0.01)。研究結(jié)果為石漠化綜合治理工作提供理論與科學(xué)依據(jù)。
[Abstract]:In order to reveal the physical and chemical properties of soils with different rocky desertification degrees and their influencing mechanisms in karst areas, the soil in Bijie rocky desertification area, Guizhou Province, was studied before, during and after the rainy season. The soil with rocky desertification intensity was monitored for 4 years. The physical and chemical properties of the soils with different rocky desertification degrees and the correlation characteristics among the indexes were analyzed. The results showed that the contents of organic matter, total phosphorus, available phosphorus, total nitrogen and hydrolyzed nitrogen in the soil under the same rocky desertification degree were before the rainy season after the rainy season. With the deepening of rocky desertification, the soil water holding capacity, capillary porosity and total porosity increased, and the contents of total phosphorus, available phosphorus and organic matter decreased. Compared with the potential rocky desertification degree, the soil total nitrogen content of mild, moderate and intensity rocky desertification degree increased by 5.6 ~ (th) and 20.9m ~ (26.6), the hydrolytic nitrogen content increased by 3.5N ~ (18. 3) and 36.2%, the total potassium content increased by 15.830 ~ (30) ~ 46.3s, and the available potassium content increased by 3.911.3n ~ (16.5m) ~ (16. 5) respectively. The results of correlation analysis showed that soil organic matter, total phosphorus, total nitrogen content, soil bulk density, total porosity and capillary water capacity were significantly correlated with soil organic matter content, total nitrogen content, bulk density and total porosity, among which the correlation between soil organic matter content, total nitrogen content, bulk density and total porosity was extremely significant (p 0.01). The results provide theoretical and scientific basis for comprehensive control of rocky desertification.
【作者單位】： 貴州師范大學(xué)喀斯特研究院/國(guó)家喀斯特石漠化防治工程技術(shù)研究中心;
【基金】：國(guó)家“十三五”重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFC0502607) 貴州省科技計(jì)劃重大專項(xiàng)(黔科合重大專項(xiàng)字[2014]6007號(hào)) 貴州師范大學(xué)博士科研啟動(dòng)基金項(xiàng)目(2017)
【分類號(hào)】：S153

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