發(fā)布時間：2018-06-15 05:55

  本文選題：土地利用 + 土壤無機碳　； 參考：《水土保持學報》2017年05期

【摘要】：土壤無機碳作為干旱區(qū)土壤碳庫的主要存在形式,其數(shù)量分布影響著區(qū)域內土壤剖面碳聚積和存儲的格局。以往由于缺乏深層土壤剖面數(shù)據,無法準確量化土壤剖面碳分布與碳存儲特征,使得土壤無機碳的數(shù)量存在很大的不確定性。以三工河流域典型的農田和相鄰荒地土壤作為研究對象,共6個剖面190個采樣點,挖掘取樣深度至潛層地下水位,分析了剖面土壤無機碳(SIC)和可溶性鹽離子的分布特征,并且通過冗余分析探究無機碳與土壤鹽堿性之間的相互關系。結果表明:(1)農田的SIC含量顯著大于荒地的SIC含量(p0.05),相比于荒地,農田的SIC含量增加了27.9%,變化范圍增大了3.66倍;荒地和農田的SIC含量在剖面上分別表現(xiàn)為"S"形和"M"形分布。(2)在整個剖面上,同層次的農田土壤中的可溶性離子含量顯著小于荒地中的含量(p0.05),并且在剖面上分布荒地表現(xiàn)為增加—減少趨勢,而農田為逐漸減小趨勢,表明農業(yè)活動顯著改變了可溶性離子的數(shù)量和分布特征。(3)所有剖面土壤無機碳儲量為0—100cm土層100—300cm土層300cm以下土層(p0.05),雖然層次間其數(shù)值差異較大,但在相同層次,農田和荒地的土壤無機碳儲量所占比例卻基本相同,為10%,35%,55%(p0.05)。(4)通過冗余分析得到土壤鹽堿性因素對SIC的貢獻作用排序,正相關性,pHESPSARCO_3~(2-)HCO_3~-;負相關性,K~+Ca~(2+)Mg~(2+)Cl~-鹽分SO_4~(2-)Cl~-Na~+。
[Abstract]:Soil inorganic carbon is the main form of soil carbon pool in arid area, and its quantity distribution affects the pattern of carbon accumulation and storage in soil profile. In the past, because of the lack of deep soil profile data, it was impossible to quantify the carbon distribution and carbon storage characteristics of soil profile accurately, which made the amount of soil inorganic carbon very uncertain. The typical farmland and adjacent wasteland soil in Sangong River Basin were used as the research objects. There were 190 sampling sites in 6 sections, and the sampling depth to the groundwater level of the subsurface layer was excavated. The distribution characteristics of soil inorganic carbon and soluble salt ions in the profile were analyzed. The relationship between inorganic carbon and soil salt alkalinity was studied by redundancy analysis. The results showed that the sic content in the farmland was significantly higher than that in the wasteland (p 0.05). Compared with the barren land, the sic content in the farmland increased by 27.9g / L and the range of variation was 3.66 times higher than that in the barren land. The sic contents of wasteland and farmland were distributed in "S" shape and "M" shape, respectively, in the whole section. The content of soluble ions in the soil of the same level was significantly lower than that in the wasteland, and the distribution of the wasteland in the profile showed an increasing-decreasing trend, while the farmland showed a decreasing trend. The results showed that agricultural activities significantly changed the quantity and distribution of soluble ions. (3) all soil inorganic carbon reserves in the profile were 0-100cm soil layer, 100-300cm soil layer, soil layer (p 0.05), although there were great differences among layers, but at the same level, the content of inorganic carbon in soil profile was lower than that in 100-300cm soil layer. The proportion of inorganic carbon storage in soil of farmland and wasteland is basically the same, that is, 10 / 3555 / 55) the contribution of soil salinity-alkali factors to sic is obtained by redundancy analysis, the positive correlation is pHESPSARCO3- (2-HCO3-); the negative correlation is K ~ CaSARCO3C ~ (2) Mg-Cl2 / C ~ (2) -salt SO4T _ 2-Cl-Na ~ (-Na ~).
【作者單位】： 中國科學院新疆生態(tài)與地理研究所荒漠與綠洲生態(tài)國家重點實驗室;中國科學院阜康荒漠生態(tài)系統(tǒng)國家野外科學觀測站;中國科學院大學;
【基金】：新疆自治區(qū)杰出青年科技創(chuàng)新人才培養(yǎng)項目(2014711009) 國家自然科學基金項目(41371200,41671114) 中科院西部之光項目(2015-XBQN-A-06)
【分類號】：S153.6

【相似文獻】

相關期刊論文 前8條

1 趙洋;陳永樂;張志山;吳攀;回嶸;虎瑞;高艷紅;;騰格里沙漠東南緣固沙區(qū)深層土壤無機碳密度及其垂直分布特征[J];水土保持學報;2012年05期

2 王玉剛;王忠媛;李彥;;干旱區(qū)鹽堿土剖面無機碳組分分布特征[J];干旱區(qū)地理;2013年04期

3 王海榮;楊忠芳;;土壤無機碳研究進展[J];安徽農業(yè)科學;2011年35期

4 許乃政;張?zhí)伊?王興祥;劉紅櫻;梁曉紅;;長江三角洲地區(qū)土壤無機碳庫研究[J];長江流域資源與環(huán)境;2009年11期

5 楊黎芳;李貴桐;;土壤無機碳研究進展[J];土壤通報;2011年04期

6 劉麗娟;王玉剛;李小玉;;干旱區(qū)綠洲土壤可溶性無機碳的空間分布特征[J];生態(tài)學雜志;2013年10期

7 崔麗峰;劉叢強;涂成龍;李龍波;丁虎;;黃土地區(qū)不同覆被下土壤無機碳分布及同位素組成特征[J];生態(tài)學雜志;2013年05期

8 陸晴;王玉剛;李彥;唐立松;;干旱區(qū)不同土壤和作物灌溉量的無機碳淋溶特征實驗研究[J];干旱區(qū)地理;2013年03期

相關碩士學位論文 前3條

1 夏厚強;開封市城市土壤有機碳和無機碳不同功能區(qū)分布特征[D];河南大學;2015年

2 張瑞;黃土高原土壤無機碳密度分布、儲量及影響因素[D];中國科學院研究生院(教育部水土保持與生態(tài)環(huán)境研究中心);2012年

3 蘇冬雪;土壤有機、無機碳庫變化差異及其對理化性質的影響[D];東北林業(yè)大學;2012年

，

本文編號：2020950