【摘要】：武功山位于江西省中西部,分布著廣袤的山地草甸,擁有較高的經(jīng)濟(jì)價(jià)值和生態(tài)價(jià)值。武功山作為國(guó)家級(jí)風(fēng)景名勝區(qū)每年接待大量來自世界各地的游客和戶外愛好者,但過度的旅游開發(fā)給武功山山地草甸系統(tǒng)帶來了巨大的破壞,大面積草甸退化現(xiàn)象突出。因此,本研究在武功山草甸金頂區(qū)域前期研究已經(jīng)開展不同草種植被修復(fù)試驗(yàn)的基礎(chǔ)上,選擇中華薹草(Carex chinensis)、芒草(Miscanthus sinensis)、飄拂草(Fimbristylis dichotoma)3種修復(fù)植被模式和未退化天然芒草植被及退化裸地(無植被)開展土壤呼吸研究,進(jìn)行為期一年的土壤呼吸原位監(jiān)測(cè),并同步測(cè)定相應(yīng)的土壤理化指標(biāo)和植物生物量指標(biāo)。旨在探討不同草種修復(fù)模式對(duì)山地草甸生態(tài)系統(tǒng)土壤呼吸的影響規(guī)律,剖析修復(fù)過程對(duì)草甸土壤生態(tài)過程以及土壤碳轉(zhuǎn)化過程的影響機(jī)制,揭示退化草甸生態(tài)系統(tǒng)恢復(fù)過程中的作用機(jī)理以及土壤功能恢復(fù)的生態(tài)學(xué)機(jī)理,為退化山地草甸土壤生態(tài)系統(tǒng)恢復(fù)的技術(shù)和模式選擇及開展后續(xù)武功山草甸恢復(fù)與氣候變化響應(yīng)的研究提供理論依據(jù)和參考。主要研究結(jié)果如下:(1)不同植被修復(fù)模式的土壤呼吸年動(dòng)態(tài)變化呈現(xiàn)出一定相似的規(guī)律,土壤呼吸峰值出現(xiàn)在夏季,最小值出現(xiàn)在冬季;峰值最大的是未退化草甸(優(yōu)勢(shì)物種芒草),最低的是退化草甸(裸地)。土壤呼吸年CO2累積排放量最大的是未退化草甸和飄拂草修復(fù)模式,最低的是裸地;(2)溫度與土壤呼吸均具有較高的相關(guān)性。裸地、未退化草甸、飄拂草修復(fù)模式、芒草修復(fù)模式和中華薹草修復(fù)模式的Q_(10)值(溫度敏感系數(shù))分別為3.11、3.68、2.09、4.10和2.20。溫度敏感性大小依次為:芒草修復(fù)模式未退化草甸裸地中華薹草修復(fù)模式飄拂草修復(fù)模式。(3)可溶性碳(DOC)、微生物碳(MBC)含量與土壤呼吸有較高的相關(guān)性。(4)采取不同草種進(jìn)行修復(fù)后的草甸植物生物量不同,采用優(yōu)勢(shì)種芒草對(duì)退化土壤進(jìn)行修復(fù)的植物地上生物量與總生物量最大,其次是飄拂草,中華薹草地上生物量和總生物量最小,飄拂草和芒草地上生物量一致,為298.67g.m-2。綜上所述:武功山不同草種修復(fù)有利于恢復(fù)退化山地草甸生態(tài)功能和土壤肥力,修復(fù)草種以優(yōu)勢(shì)種芒草為佳。溫度和DOC對(duì)土壤呼吸有顯著影響,其中優(yōu)勢(shì)種芒草溫度敏感性最強(qiáng),飄拂草最低。
[Abstract]:Wukong Mountain is located in the middle and west of Jiangxi Province, with a wide range of mountain meadows with high economic and ecological value. As a national scenic spot, Wugong Mountain receives a large number of tourists and outdoor enthusiasts from all over the world every year. However, excessive tourism development has caused great damage to the mountain meadow system of Wukong Mountain, and the degradation phenomenon of large area meadow is prominent. Therefore, this study is based on the previous study of the Jinding area of Wukong Mountain Meadow, which has carried out experiments of vegetation restoration of different species of grass. Soil respiration of Carex chinensis), sinensis), (Fimbristylis dichotoma), undegraded natural mango vegetation and degenerated bare land (no vegetation) were studied in situ monitoring of soil respiration for one year. The soil physicochemical index and plant biomass index were measured simultaneously. The purpose of this study was to investigate the effects of different remediation models on soil respiration in mountain meadow ecosystem, and to analyze the mechanism of the effects of remediation on soil ecological processes and soil carbon transformation in meadow. The ecological mechanism of the restoration of degraded meadow ecosystem and the restoration of soil function were revealed. It provides a theoretical basis and reference for the selection of techniques and models for soil ecosystem restoration in degraded mountain meadow and for the subsequent study on the restoration of meadow and the response to climate change in Wugong Mountain. The main results are as follows: (1) the dynamic changes of soil respiration in different vegetation restoration models showed a similar pattern, the peak value of soil respiration appeared in summer, and the minimum occurred in winter; The highest peak was in undegraded meadow (dominant species mango) and the lowest in degraded meadow (bare land). The annual CO2 accumulative emissions of soil respiration were the largest in undegraded meadow and floating grass remediation model, and the lowest in bare land. (2) there was a high correlation between temperature and soil respiration. The Q _ (10) values (temperature sensitivity coefficient) of bare land, undegraded meadow, repairment model, mango repair model and Carex sinensis repair model were 3.113.682.09 (4.10) and 2.20 (r = 2.20), respectively. The order of temperature sensitivity was: Carex sinensis repair model in undegraded meadow, (3) soluble carbon (DOC), microbial carbon (MBC) content and soil respiration. The plant biomass of meadow was different after restoration. The aboveground biomass and the total biomass of the degraded soil were the largest, followed by the fluffy grass, the minimum biomass and the total biomass on the Chinese bolting grassland, and the biomass on the Avening grassland was the same (298.67 g 路m ~ (-2). To sum up: the restoration of different grass species in Wugong Mountain is beneficial to the restoration of ecological function and soil fertility of degraded mountain meadow, and the dominant species is the best. Temperature and DOC had significant effects on soil respiration, among which the dominant species was the most sensitive to temperature and the lowest.
【學(xué)位授予單位】：江西農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S812.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳花丹;;中亞熱帶闊葉林土壤呼吸動(dòng)態(tài)及其影響因素研究[J];林業(yè)勘察設(shè)計(jì);2017年01期

2 張亮;韓靜艷;王道涵;王凱;蒙洋;邱月;張學(xué)耀;布仁巴雅爾;杜森云;張光明;閆彩鳳;陳全勝;;草地生態(tài)系統(tǒng)土壤呼吸對(duì)放牧干擾的響應(yīng)研究進(jìn)展[J];生態(tài)科學(xué);2017年02期

3 夏秀雪;高國(guó)強(qiáng);王東男;肖立娟;谷加存;;林下植被去除對(duì)水曲柳人工林土壤呼吸、微生物和根系動(dòng)態(tài)的短期影響[J];生態(tài)學(xué)雜志;2017年05期

4 馬麗;徐滿厚;翟大彤;賈燕燕;;高寒草甸植被-土壤系統(tǒng)對(duì)氣候變暖響應(yīng)的研究進(jìn)展[J];生態(tài)學(xué)雜志;2017年06期

5 高金芳;周波;馬濤;張峰;董彥麗;王彥武;于惠;;半干旱區(qū)不同土地利用方式下土壤呼吸特征[J];水土保持研究;2017年02期

6 呂富成;王小丹;;凋落物對(duì)土壤呼吸的貢獻(xiàn)研究進(jìn)展[J];土壤;2017年02期

7 柴錦隆;徐長(zhǎng)林;楊海磊;張建文;肖紅;潘濤濤;王艷;魚小軍;;模擬踐踏和降水對(duì)高寒草甸土壤物理特性和微生物數(shù)量的影響[J];草業(yè)學(xué)報(bào);2017年02期

8 王紅;王邵軍;李霽航;阿麗米拉·葉爾肯;;森林土壤呼吸及其主要調(diào)控因素研究進(jìn)展[J];西北林學(xué)院學(xué)報(bào);2017年01期

9 劉發(fā)林;;模擬火干擾對(duì)森林土壤微生物活性及氮礦化的影響[J];生態(tài)學(xué)報(bào);2017年07期

10 高樹琴;趙霞;方精云;;我國(guó)草地的固碳功能[J];中國(guó)工程科學(xué);2016年01期

相關(guān)博士學(xué)位論文 前4條

1 梁爽;吉林西部鹽堿農(nóng)田土壤酶和微生物對(duì)有機(jī)碳和無機(jī)碳變化的作用研究[D];吉林大學(xué);2016年

2 賈興永;生物炭及翻堆頻率對(duì)雞糞堆肥過程中溫室氣體排放的影響[D];中國(guó)農(nóng)業(yè)大學(xué);2015年

3 韓維崢;吉林西部草地退化恢復(fù)與碳收支的耦合研究[D];吉林大學(xué);2011年

4 張鴿香;城市不同植被類型土壤呼吸與微生物量碳研究[D];南京林業(yè)大學(xué);2011年

相關(guān)碩士學(xué)位論文 前10條

1 張宇鵬;基于SCF-S2002和LI-8100的三種典型人工林土壤呼吸特征及經(jīng)營(yíng)影響研究[D];浙江農(nóng)林大學(xué);2016年

2 鄧邦良;增溫和氮沉降對(duì)武功山修復(fù)草甸土壤碳氮過程的影響研究[D];江西農(nóng)業(yè)大學(xué);2016年

3 張威震;不同管理和擾動(dòng)方式下壩上地區(qū)草地土壤呼吸特征研究[D];河北大學(xué);2016年

4 程曉;武功山山地草甸植物群落特征及空間分布格局研究[D];江西農(nóng)業(yè)大學(xué);2014年

5 趙曉蕊;武功山山地草甸土壤磷素的空間分布及磷素有效性的研究[D];江西農(nóng)業(yè)大學(xué);2014年

6 唐劍波;武功山退化草甸土壤養(yǎng)分限制因子及其對(duì)植被生物量的影響[D];江西農(nóng)業(yè)大學(xué);2014年

7 蘇宏偉;華西雨屏區(qū)不同植被類型土壤呼吸特征[D];四川農(nóng)業(yè)大學(xué);2013年

8 羅成鳳;江西武功山山地草甸植物多樣性研究[D];江西農(nóng)業(yè)大學(xué);2013年

9 劉森;大安市草地碳儲(chǔ)量變化及影響因素研究[D];吉林大學(xué);2012年

10 張義輝;亞高山草甸土壤呼吸的時(shí)空變異特征研究[D];山西大學(xué);2010年

，

本文編號(hào)：2121384