本文關(guān)鍵詞： 土壤 碳 氮 鹽沼 光灘 海水養(yǎng)殖塘 雙臺(tái)河口　出處：《濕地科學(xué)》2017年04期 　論文類型：期刊論文

【摘要】：2013年9月11日和12日,在雙臺(tái)河口的天然堿蓬鹽沼、退化堿蓬鹽沼、光灘和海水養(yǎng)殖塘中,分層采集0~100 cm深度的土壤樣品,測定其有機(jī)碳含量、可溶解有機(jī)碳含量、全氮含量、銨態(tài)氮含量、硝態(tài)氮含量和碳氮比,并分析這些指標(biāo)的垂直分布特征。研究結(jié)果表明,在天然堿蓬鹽沼中,不同深度的土壤有機(jī)碳含量都顯著高于其它類型濕地土壤(p0.05);除養(yǎng)殖塘外,其它類型濕地土壤有機(jī)碳含量總體上隨著土壤深度增加而減小,養(yǎng)殖塘不同深度土壤有機(jī)碳含量差異不明顯;天然堿蓬鹽沼不同深度土壤的全氮含量都顯著高于退化堿蓬鹽沼和光灘土壤(p0.05),總體上,隨著土壤深度增加,天然堿蓬鹽沼和退化堿蓬鹽沼土壤的全氮含量減小,養(yǎng)殖塘土壤的全氮含量波動(dòng)變化。在0~10 cm深度,光灘土壤的碳氮比最高;養(yǎng)殖塘不同深度土壤碳氮比都較低。隨著土壤深度增加,天然堿蓬鹽沼、光灘和養(yǎng)殖塘土壤中的可溶性有機(jī)碳含量波動(dòng)變化,且無顯著差異;退化堿蓬鹽沼土壤可溶性有機(jī)碳含量波動(dòng)減小。隨著土壤深度增加,退化堿蓬鹽沼土壤銨態(tài)氮含量減小,養(yǎng)殖塘土壤中的銨態(tài)氮含量呈單峰曲線變化,峰值出現(xiàn)在30~50 cm深度土層;光灘土壤銨態(tài)氮含量波動(dòng)減小。在土壤垂直方向上,各類型濕地土壤硝態(tài)氮含量都波動(dòng)變化;與其它濕地類型相比,養(yǎng)殖塘不同深度土壤硝態(tài)氮含量都最低。
[Abstract]:In September 11th 2013 and 12th, soil samples at a depth of 0 ~ 100cm were collected from natural Suaeda salsa, degraded Suaeda salsa, bare beach and mariculture pond in Shuangtai Estuary. The organic carbon content, soluble organic carbon content, total nitrogen content, ammonium nitrogen content, nitrate nitrogen content and C / N ratio were determined. The vertical distribution characteristics of these indexes were analyzed. Soil organic carbon content in different depths was significantly higher than that in other types of wetland soil. With the increase of soil depth, the content of soil organic carbon in other types of wetland decreased with the increase of soil depth, but there was no significant difference in soil organic carbon content in different depth of culture pond. The total nitrogen content of the natural Suaeda salsa salt marsh at different depths was significantly higher than that of the degraded Suaeda salsa salt marsh and bare beach soil (P 0.05), as a whole, with the increase of soil depth. The total nitrogen content of natural Suaeda salsa salt marsh and degraded Suaeda salsa salt marsh soil decreased, while the total nitrogen content of culture pond soil fluctuated. At the depth of 0 ~ 10 cm, the carbon to nitrogen ratio of bare beach soil was the highest. With the increase of soil depth, the content of soluble organic carbon in the natural salsa salt marsh, bare beach and culture pond soil fluctuated, and there was no significant difference in the content of soluble organic carbon. The fluctuation of soluble organic carbon content in degraded Suaeda salsa salt marsh soil decreased. With the increase of soil depth, the ammonium nitrogen content in degraded Suaeda salsa salt marsh soil decreased, and the ammonium nitrogen content in culture pond soil showed a single peak curve. The peak value appeared in the depth of 30 ~ 50 cm soil layer; The fluctuation of ammonium nitrogen content in Guangtan soil decreased. In the vertical direction of soil, nitrate nitrogen content in all types of wetland soil fluctuated. Compared with other wetland types, the nitrate nitrogen content in different depth soil of culture pond was the lowest.
【作者單位】： 中國科學(xué)院濕地生態(tài)與環(huán)境重點(diǎn)實(shí)驗(yàn)室中國科學(xué)院東北地理與農(nóng)業(yè)生態(tài)研究所;中國科學(xué)院大學(xué);
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2013CB430401) 國家自然科學(xué)基金項(xiàng)目(41301085)資助
【分類號(hào)】：S153.6
【正文快照】： 濱海濕地是介于陸地和海洋過渡帶的特殊生態(tài)系統(tǒng),具有季節(jié)或常年性積水和土壤發(fā)生潛育化等特征,初級(jí)生產(chǎn)力極高[1]。濱海地區(qū)特別是河口三角洲是人類活動(dòng)的密集區(qū)域。在全世界范圍內(nèi),為了緩解人口增長和生產(chǎn)發(fā)展導(dǎo)致的用地壓力,大規(guī)模的圍墾濱海濕地已經(jīng)成為一種普遍解決方法,，

本文編號(hào)：1474530