本文關(guān)鍵詞： 河流濕地 土壤可溶性有機(jī)氮(SON) 墾殖 伊犁河谷　出處：《南京林業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期 　論文類型：期刊論文

【摘要】：【目的】研究墾殖對(duì)伊犁河谷濕地土壤可溶性有機(jī)氮(SON)的影響,為該區(qū)濕地的開發(fā)保護(hù)和氮素調(diào)控提供科學(xué)依據(jù)�！痉椒ā恳砸晾绾庸鹊奶J葦濕地及其墾殖而成的稻田為研究對(duì)象,分層采集0~100 cm的土壤樣品,分析墾殖對(duì)垂直方向上土壤SON含量的影響,并探求SON與土壤理化性質(zhì)和其他氮組分之間的關(guān)系。【結(jié)果】在0~100 cm土壤深度內(nèi),蘆葦濕地和稻田土壤的SON含量占土壤可溶性總氮(TSN)含量的58.9%~74.1%,表明SON是該區(qū)域土壤可溶性氮素的主要組成部分;土壤SON含量在墾殖后降低了16.7%~40.5%,在≥20~60cm土層表現(xiàn)為顯著降低,表明墾殖對(duì)土壤可溶性有機(jī)氮的影響不僅限于表層土壤,這緣于濕地和稻田土壤的高含水率使得土壤SON在垂直方向上的移動(dòng)性較強(qiáng);濕地土壤的有機(jī)碳和全氮在墾殖后大幅減少,其中墾殖前的含量分別是墾殖后的2.9~5.9倍和2.0~6.0倍�？傮w上講,土壤碳氮比、微生物量氮、銨態(tài)氮和硝態(tài)氮在開墾前后的變化不大,只有0~20 cm土層的微生物量氮和硝態(tài)氮在墾殖后顯著降低(P0.05);土壤SON與土壤有機(jī)碳和全氮表現(xiàn)出顯著的相關(guān)性,說(shuō)明墾殖后土壤有機(jī)質(zhì)水平的降低是SON含量下降的主要原因�！窘Y(jié)論】土壤SON是伊犁河谷濕地土壤可溶性氮素的主要形態(tài),但其含量在濕地墾殖為稻田后表現(xiàn)出減少的趨勢(shì)。
[Abstract]:[objective] to study the effect of reclamation on soil soluble organic nitrogen (SON) in Yili Valley wetland. [methods] the Reed wetland in Yili River Valley and its cultivated paddy field were taken as the research object, and the soil samples of 0 ~ 100 cm were collected by stratification. The effect of reclamation on soil SON content in vertical direction was analyzed, and the relationship between SON and soil physical and chemical properties and other nitrogen components was explored. [results] the soil depth was within 0 ~ 100cm. The SON content of Reed wetland and paddy soil accounted for 58.9% of the total soluble nitrogen (TN) content in the soil, indicating that SON is the main component of soil soluble nitrogen in this region. The content of SON in soil decreased by 16.7% and decreased significantly in soil layer 鈮，

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