發(fā)布時(shí)間：2018-01-09 12:17

  本文關(guān)鍵詞：毛烏素沙地不同植被類型的土壤顆粒分形與土壤碳氮變化特征　出處：《東北林業(yè)大學(xué)學(xué)報(bào)》2016年08期 　論文類型：期刊論文

  更多相關(guān)文章： 毛烏素沙地 植被類型 土壤有機(jī)質(zhì) 全氮質(zhì)量分?jǐn)?shù) 顆粒組成

【摘要】：為了探討不同植被類型的土壤碳氮特征,測(cè)定了毛烏素沙地不同植被群落土壤0~10、10~20和20~60 cm土層土壤有機(jī)質(zhì)、全氮及土壤顆粒組成的動(dòng)態(tài)變化,并分析了土壤顆粒組成中沙粒、極細(xì)沙和黏粉粒質(zhì)量分?jǐn)?shù)變化與土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)間的關(guān)系。結(jié)果表明,固沙植被的建植顯著提高土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù),而不同植被類型對(duì)土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)的影響差異主要發(fā)生在土壤表層(0~10 cm),深層差異不顯著。而同一植被類型土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)隨土層加深呈下降趨勢(shì),表現(xiàn)出垂直方向的變異。其中樟子松樣地對(duì)表層土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)含量影響最大,具有明顯表聚性,隨土層加深土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)含量下降最為顯著,而沙柳+油蒿+楊柴樣地和沙地柏+油蒿樣地土壤有機(jī)質(zhì)、全氮質(zhì)量分?jǐn)?shù)隨土層加深無(wú)顯著變化。固沙植被的建植顯著提高土壤黏粉粒(0.05 mm)和極細(xì)沙(0.05~0.10 mm)質(zhì)量分?jǐn)?shù),而顯著降低了沙粒質(zhì)量分?jǐn)?shù)(0.1~1.0 mm),不同植被類型樣地各層土壤極細(xì)沙和黏粉粒質(zhì)量分?jǐn)?shù)由大到小依次為樟子松樣地、沙地柏油蒿樣地、沙柳油蒿楊柴樣地,而沙粒質(zhì)量分?jǐn)?shù)與之相反。同一植被類型樣地,隨土層加深沙粒平均質(zhì)量分?jǐn)?shù)均呈增加趨勢(shì),極細(xì)沙和黏粉粒質(zhì)量分?jǐn)?shù)則呈降低趨勢(shì)。土壤顆粒組成與土壤有機(jī)質(zhì)、全氮質(zhì)量分?jǐn)?shù)間相關(guān)性表明,土壤中黏粉粒和極細(xì)沙粒質(zhì)量分?jǐn)?shù)分別與土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)呈顯著正相關(guān),而沙粒質(zhì)量分?jǐn)?shù)卻與土壤有機(jī)質(zhì)和全氮質(zhì)量分?jǐn)?shù)呈顯著負(fù)相關(guān)(p0.01)。
[Abstract]:In order to study the characteristics of soil carbon and nitrogen in different vegetation types, different vegetation communities in Maowusu sandy land soil 0~10,10~20 and 20~60 cm soil organic matter was determined, the dynamic changes of total nitrogen and soil particle composition, and analyzed the composition of soil particles in sand, very fine sand and clay particle content and the change of soil organic matter and total nitrogen content. The relationship between plant construction. The results show that the sand fixing vegetation significantly increased soil organic matter and total nitrogen content, and the effects of different vegetation types on soil organic matter and total nitrogen content differences occurred mainly in the soil surface (0~10 cm), the difference was not significant. The deep and the same vegetation types, soil organic matter and total nitrogen mass fraction soil depth decreased, showing variation in the vertical direction. Which kind of Pinus sylvestris on surface soil organic matter and total nitrogen content has the greatest impact, Ming Significant surface accumulation, with depth of soil organic matter and total nitrogen content decreased most significantly, and Salix + Artemisia ordosica + Hedysarum mongolicum samples and Sabina vulgaris + Artemisia ordosica to soil organic matter, total nitrogen content increased with soil depth. No significant changes in plant construction sand fixing vegetation significantly increased soil clay particle (0.05) and mm (0.05~0.10 mm) very fine sand mass fraction, and significantly reduced the sand mass fraction (0.1~1.0, mm) of different types of vegetation plots in different soil layer of fine sand and clay particle content followed by Pinus sylvestris plots, tar sand Artemisia plots, Salix ordosica Hedysarum mongolicum plots. And the sand content on the contrary. The same vegetation types, with depth of sand mass fraction increased, very fine sand and clay silt mass fraction decreased. Soil particle composition and soil organic matter, total nitrogen mass fraction showed that the correlation between, The mass fraction of clay and fine sand was positively correlated with soil organic matter and total nitrogen content, while the sand mass fraction was negatively correlated with soil organic matter and total nitrogen content (P0.01).

【作者單位】： 內(nèi)蒙古林業(yè)科學(xué)研究院;
【基金】：林業(yè)科技創(chuàng)新平臺(tái)項(xiàng)目(2015-ZYPT-DW-039)
【分類號(hào)】：S151.9
【正文快照】： 1)林業(yè)科技創(chuàng)新平臺(tái)項(xiàng)目(2015-ZYPT-DW-039)。nmg.dyx@163.com。Characteristic of Soil Particle Size Distribution and Soil Organic Carbon and Nitrogen Dynamics of Different Veg-etation Types in the Mu Us Sandy Land//Zhang Lixin,Duan Yuxi,Wang Weifeng,Wang Bo,

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