發(fā)布時(shí)間：2018-05-07 18:24

  本文選題：高寒沼澤 + 積水�。� 參考：《西南林業(yè)大學(xué)學(xué)報(bào)(自然科學(xué))》2017年02期

【摘要】：通過野外樣品采集和室內(nèi)測(cè)定分析,對(duì)若爾蓋季節(jié)性積水和常年積水沼澤土壤有機(jī)碳與氮含量的垂直分布進(jìn)行研究。結(jié)果表明:在0~200 cm土層內(nèi),常年積水沼澤的有機(jī)碳含量為270.174 g/kg,氮含量為11.963 g/kg;季節(jié)性積水沼澤碳含量為212.066 g/kg,氮含量為10.824g/kg;季節(jié)性積水沼澤的平均碳、氮含量均低于常年積水沼澤。在0~60 cm土層,2種沼澤的各層次有機(jī)碳含量無顯著差異,均表現(xiàn)為下降趨勢(shì);在60~110 cm土層,2種沼澤的有機(jī)碳含量呈現(xiàn)不同程度的增加,但常年積水沼澤有機(jī)碳含量增加幅度與速率均明顯大于季節(jié)性積水沼澤;在110~200 cm土層,含碳量變化趨于相對(duì)穩(wěn)定,但同等深度下常年積水沼澤的含碳量明顯高于季節(jié)性積水沼澤。在泥炭表、中層(0~110 cm),季節(jié)性積水沼澤氮含量常年積水沼澤;而在泥炭底層(110~200 cm),季節(jié)性積水沼澤氮含量常年積水沼澤。有機(jī)碳和氮含量數(shù)據(jù)表明,在常年積水沼澤向季節(jié)性積水沼澤演變過程中,有機(jī)碳含量呈現(xiàn)一定趨勢(shì)的減小,濕地的碳匯功能發(fā)生了變化。
[Abstract]:The vertical distribution of soil organic carbon and nitrogen content in Zoige seasonal hydrops and perennial stagnant swamps was studied by field sampling and laboratory analysis. The results showed that the organic carbon content and nitrogen content were 270.174 g / kg, 11.963 g / kg, 212.066 g / kg and 10.824 g / kg, respectively. There was no significant difference in organic carbon content in all layers of the two types of swamps in 0 ~ 60 cm soil layer, and the organic carbon contents of the two kinds of swamps in the soil layer of 60 ~ 110 cm were increased in different degrees. However, the increasing range and rate of organic carbon content in perennial stagnant swamps are obviously larger than those in seasonal ponds, and the change of carbon content tends to be relatively stable in 110 ~ 200 cm soil layer. But at the same depth, the carbon content of perennial stagnant swamps is obviously higher than that of seasonal stagnant swamps. On the peat table, the nitrogen content of the seasonal stagnant marsh is 110 cm ~ (-1), while that of the peat bottom is 110 ~ 200 cm ~ (-1). The organic carbon and nitrogen content data showed that the organic carbon content decreased and the carbon sink function of the wetland changed during the evolution from the perennial stagnant swamps to the seasonal waterlogged swamps.
【作者單位】： 西南林業(yè)大學(xué)環(huán)境科學(xué)與工程學(xué)院;西南林業(yè)大學(xué)國(guó)家高原濕地研究中心;
【基金】：科技部基礎(chǔ)研究項(xiàng)目(2013FY111800)資助 西南林業(yè)大學(xué)高原濕地科學(xué)省創(chuàng)新團(tuán)隊(duì)(2012HC007)資助 云南省基金項(xiàng)目(2012FD030)資助 國(guó)家自然科學(xué)基金(41461022、41101097)資助
【分類號(hào)】：S153.6
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本文編號(hào)：1857981