本文選題：紅樹林濕地 + 有機(jī)碳��； 參考：《廣西師范學(xué)院》2017年碩士論文

【摘要】：氣候變化是全球關(guān)注的重大問題,而二氧化碳的過量排放是導(dǎo)致全球氣候變暖的重要原因。本文重點(diǎn)研究華南地區(qū)紅樹林表層土壤有機(jī)碳,探討該地區(qū)紅樹林濕地表層土壤有機(jī)碳分布特點(diǎn)以及影響有機(jī)碳分布的主要因子。本研究將華南地區(qū)按廣東、海南、廣西劃分調(diào)查區(qū)域,選取了白骨壤群落、無瓣海桑群落、白骨壤群落+桐花樹群落、紅海欖+白骨壤群落、白骨壤+桐花樹+紅海欖群落、紅海欖群落、海桑群落、正紅樹群落、桐花樹群落等9種群落,用環(huán)刀法以10cm為一層采集紅樹林群落林下0-30cm土壤,測定所在區(qū)域海水pH值、鹽度、溫度、溶解氧、電導(dǎo)率等海水基本要素,并通過室內(nèi)實(shí)驗(yàn)測定土壤有機(jī)碳含量,土壤容重、孔隙度、含水率等土壤理化指標(biāo),計(jì)算土壤有機(jī)碳密度、碳儲量。利用SPSS 17.0和Excel 2010處理數(shù)據(jù)并進(jìn)行相關(guān)性分析和方差分析。比較華南紅樹林濕地表層土壤有機(jī)碳含量、有機(jī)碳密度、有機(jī)碳儲量在不同種紅樹植物群落以及不同區(qū)域中的垂直分布特征,分析土壤理化性質(zhì)、緯度梯度、紅樹植物、人為干擾對土壤有機(jī)碳含量產(chǎn)生的影響。研究結(jié)果表明:1、華南三省紅樹林表層土壤(0-30cm)有機(jī)碳含量介于為:0.91~103.42 g/kg,平均含量為18.67 g/kg,變異系數(shù)極高(0.82);有機(jī)碳密度平均值為:1.68 kg/m~2;估算華南地區(qū)紅樹林濕地表層土壤(0-30cm)有機(jī)碳儲量為50.53 t/hm~2;2、不同地區(qū)的紅樹林濕地表層土壤(0-30cm)有機(jī)碳含量大小為:海南(25.03 g/kg)廣西(15.78 g/kg)廣東(15.20 g/kg);3、華南紅樹林表層土壤有機(jī)碳含量隨著土壤深度的增加而升高的垂直分布趨勢,20-30cm10-20cm0-10cm,結(jié)果分別為:19.66 g/kg、18.32 g/kg、18.05 g/kg;4、不同植物群落的紅樹林表層土壤有機(jī)碳含量大小排序?yàn)闊o瓣海桑群落(22.27 g/kg)白骨壤+桐花樹群落(22.19 g/kg)紅海欖群落(21.67 g/kg)正紅樹群落(21.38 g/kg)白骨壤+紅海欖+桐花樹群落(20.51 g/kg)海桑群落(19.24 g/kg)白骨壤群落(15.63g/kg)桐花樹群落(10.87g/kg);5、華南濱海紅樹林表層土壤有機(jī)碳密度分布:海南(2.18 kg/m)廣西(1.55 kg/m)廣東(1.32 kg/m~2)。土壤有機(jī)碳密度垂直分布呈先增后減的趨勢,10-20cm0-10cm20-30cm,結(jié)果分別為:1.81 kg/m~2、1.65kg/m~2、1.59 kg/m~2;6、緯度梯度是影響華南地區(qū)紅樹林表層土壤有機(jī)碳含量區(qū)位分布的重要因素;7、紅樹植物群落的凋落物是華南地區(qū)紅樹林土壤有機(jī)碳含量群落分布差異的重要因素;8、土壤容重與土壤有機(jī)碳含量之間呈極顯著負(fù)相關(guān)(p0.01)(y=-25.87x+45.274,R~2=0.357),土壤孔隙度、土壤含水率與土壤有機(jī)碳含量之間呈極顯著正相關(guān)(p0.01)公式分別為(y=2.1188e0.0331x,R~2=0.421)(y=2.0311x+30.273,R~2=0.5217)。
[Abstract]:Climate change is a major global concern, and excessive carbon dioxide emissions are a major cause of global warming. In this paper, the distribution characteristics of soil organic carbon in mangrove wetland and the main factors affecting the distribution of organic carbon were discussed. In this study, the investigation areas in South China were divided according to Guangdong, Hainan and Guangxi. White bone soil community, non-petal sea mulberry community, white bone soil community, red sea elm community were selected. Nine communities, such as red sea elm community, sea mulberry community, mangrove community and tung flower tree community, were collected from 0-30cm soil under mangrove community by 10cm method. The pH value, salinity, temperature and dissolved oxygen of seawater in the region were measured. Soil organic carbon density and carbon storage were calculated by measuring soil organic carbon content, soil bulk density, porosity, moisture content and other soil physical and chemical indexes. The data were processed by SPSS 17.0 and Excel 2010, and the correlation analysis and variance analysis were carried out. The soil organic carbon content, organic carbon density and organic carbon storage in the surface soil of mangrove wetland in South China were compared in different mangrove communities and different regions. The soil physical and chemical properties, latitude gradient and mangrove plants were analyzed. Effects of anthropogenic interference on soil organic carbon content. The results showed that the content of organic carbon in the top layer of mangroves in the three provinces of South China ranged from 0 to 30 cm 路kg ~ (-1), with an average content of 18.67 g / kg and an average of 18.67 g / kg, with a very high coefficient of variation of 0.82g / kg; the average organic carbon density was 1. 68 kg / m ~ (-2); the estimation of the surface soil of mangrove wetlands in South China was 0-30 cm). The organic carbon storage is 50.53 t / hm ~ (2) ~ (2), and the content of organic carbon in the surface soil of mangrove wetland in different areas is: Hainan (25.03 g / kg), Guangxi (15.78 g / kg) Guangdong Province (15.20 g / kg ~ (-3). The soil organic carbon content in the top layer of mangrove in South China increases with the increase of soil depth. The vertical distribution trend was 20-30 cm 10-20 cm 0-10 cm, and the results were: 1 19.66 g / kg ~ 18.32 g / kg ~ 18.05 g 路kg ~ (-1) 路kg ~ (4). The order of soil organic carbon content of mangrove community in different plant communities was 22. 27 g / kg (n = 22. 27 g / kg). The floral community of Paulownia alpingoides was 22.19 g / kg) and the mangrove community was 21. 67 g / kg). The distribution of organic carbon density in the surface soil of mangrove in southern China is 10.87 g / kg 路kg ~ (5). The distribution of organic carbon density in the surface soil of mangroves in southern China is 2.18 kg / m) 1.55 kg / m in Guangxi. The vertical distribution of soil organic carbon density increased first and then decreased. The results were as follows: 1.81 kg 路m ~ (-1) 路m ~ (2 +) = 1.65 kg / m ~ (2) ~ 2.59 kg / m ~ (2) ~ (2). Latitude gradient was an important factor influencing the location distribution of soil organic carbon content in mangrove topsoil in South China, and the litter of mangrove plant community was 7kg 路m ~ (-1) ~ (-1) 路m ~ (-1) 路m ~ (-1), respectively. Soil organic carbon content in mangroves in South China is an important factor, and soil bulk density is negatively correlated with soil organic carbon content. There was a significant positive correlation between soil moisture content and soil organic carbon content.
【學(xué)位授予單位】：廣西師范學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S714.2

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