本文選題：桉樹(shù)　切入點(diǎn)：連栽　出處：《廣西大學(xué)》2017年碩士論文

【摘要】：桉樹(shù)具有速生性、豐產(chǎn)性、耐貧瘠、干形較好等優(yōu)勢(shì),木材大堅(jiān)硬,抗腐能力強(qiáng),廣泛可用于建筑、家具、火柴、碳材等,具有較高的使用價(jià)值和經(jīng)濟(jì)價(jià)值。本研究采用空間序列代替時(shí)間(連栽)的采樣方法,擬通過(guò)對(duì)連栽經(jīng)營(yíng)桉樹(shù)人工林的生長(zhǎng)規(guī)律、土壤有機(jī)碳儲(chǔ)量、土壤有機(jī)碳的物理化學(xué)組分、土壤有機(jī)碳波譜特征等方面的分析研究,結(jié)果表明:(1)桉樹(shù)連栽對(duì)土壤有機(jī)碳儲(chǔ)量的影響。0-20cm的有機(jī)碳含量是桉一代桉二代,兩者相差在2.56g·kg-1,20-100cm的各土層有機(jī)碳含量則是桉二代桉一代,兩者相差在0.15g·kg-1-0.76g·kg-1�？梢�(jiàn),桉樹(shù)雖然有一定的固碳能力,但是由于桉樹(shù)輪伐期較短,枯株落葉未能及時(shí)分解轉(zhuǎn)換成土壤中的有機(jī)質(zhì),且桉二代清理林地多采用煉山方式,枯落物轉(zhuǎn)化成CO2進(jìn)入大氣,因此,隨著桉樹(shù)代次的增加,土壤有機(jī)碳的含量相對(duì)減少。(2)桉樹(shù)連栽對(duì)土壤有機(jī)碳物理化學(xué)組分的影響。不同栽植代數(shù)桉樹(shù)人工林及杉木林土壤輕組及重組有機(jī)碳含量均隨著土層的加深呈逐漸減少的趨勢(shì)。土壤團(tuán)聚體有機(jī)碳含量隨著土層的加深呈逐漸減少的趨勢(shì)。土壤活性有機(jī)碳、慢性有機(jī)碳、惰性有機(jī)碳含量的變化皆表現(xiàn)為隨著土層的加深而逐漸減少。(3)桉樹(shù)連栽對(duì)土壤有機(jī)碳波譜特征的影響。不同人工林土壤脂族碳/芳香碳的比值大小順序?yàn)樯寄捐褚淮?杉木桉二代;烷基碳/烷氧碳比值的大小順序?yàn)殍穸寄?桉一代=杉木;疏水碳/親水碳的比值的大小順序桉二代杉木,桉一代杉木。桉一代、桉二代和杉木林土壤4個(gè)分層的土壤紅外光譜非常相似。
[Abstract]:Eucalyptus has the advantages of fast growth, high yield, poor tolerance, good dry shape, and so on. The wood is hard and strong, and can be widely used in construction, furniture, matches, carbon materials, etc. In this study, the spatial sequence instead of time (continuous planting) sampling method was used to study the soil organic carbon storage through the growth law of continuous planting eucalyptus plantation. The physical and chemical components of soil organic carbon and the spectral characteristics of soil organic carbon were analyzed. The results showed that the effect of continuous planting of eucalyptus on soil organic carbon storage was 0.0-20cm, which was the second generation of eucalyptus. The content of organic carbon in each soil layer with the difference of 2.56 g 路kg ~ (-1) ~ 20 ~ 100 cm was the second generation of eucalyptus, and the difference was 0.15 g / kg ~ (-1). It can be seen that although eucalyptus has a certain carbon sequestration ability, the rooting period of eucalyptus is shorter than that of eucalyptus. Litter could not be decomposed into soil organic matter in time, and the second generation of Eucalyptus forest land was cleared by mountain chain, and the litter was transformed into CO2 to enter the atmosphere. Therefore, with the increase of eucalyptus generations, The effect of continuous planting of eucalyptus on the physical and chemical components of soil organic carbon. Soil light and recombination organic carbon contents of different planting generations of eucalyptus plantation and Chinese fir forest were increased with the deepening of soil layer. Soil aggregate organic carbon content decreases gradually with the deepening of soil layer. Chronic organic carbon, The change of inert organic carbon content showed that with the deepening of soil layer, the effect of continuous planting of eucalyptus on the soil organic carbon spectrum characteristics was decreased. The ratio of lipid carbon to aromatic carbon in different plantation soil was in the order of Chinese fir eucalyptus generation. The order of the ratio of alkyl carbon to alkyl oxygen carbon is eucalyptus second generation Chinese fir, eucalyptus generation = Chinese fir, the size order of hydrophobic carbon / hydrophilic carbon ratio is eucalyptus second generation Chinese fir, eucalyptus generation Cunninghamia lanceolata, eucalyptus generation, eucalyptus, The infrared spectra of the soils of the second generation of Eucalyptus and Chinese fir forest were very similar.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S792.39;S714.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 覃艷媚;;桉樹(shù)連栽土壤變化與追肥施肥效果的研究[J];科技展望;2015年20期

2 張福韜;喬云發(fā);;紅外光譜與核磁共振在土壤有機(jī)質(zhì)結(jié)構(gòu)研究中的應(yīng)用[J];安徽農(nóng)業(yè)科學(xué);2015年07期

3 劉翥;楊玉盛;朱錦懋;司友濤;謝錦升;楊智杰;;中亞熱帶2種經(jīng)濟(jì)林土壤可溶性有機(jī)質(zhì)數(shù)量與光譜學(xué)特征比較[J];水土保持學(xué)報(bào);2014年05期

4 李耀翔;汪洪濤;耿志偉;張鵬;徐浩凱;;基于近紅外光譜及BP神經(jīng)網(wǎng)絡(luò)分析法預(yù)測(cè)森林土壤有機(jī)碳含量[J];西部林業(yè)科學(xué);2014年03期

5 劉立龍;楊彩玲;蔣代華;肖斌;崔俊峰;;連栽桉樹(shù)人工林不同代次土壤養(yǎng)分與酶活性的分析[J];熱帶作物學(xué)報(bào);2013年11期

6 鄧力;李況;吳慶標(biāo);莫德祥;;短輪伐經(jīng)營(yíng)對(duì)桉樹(shù)人工林生態(tài)系統(tǒng)碳氮積蓄的潛在影響[J];安徽農(nóng)業(yè)科學(xué);2013年09期

7 商素云;姜培坤;宋照亮;李永夫;林琳;;亞熱帶不同林分土壤表層有機(jī)碳組成及其穩(wěn)定性[J];生態(tài)學(xué)報(bào);2013年02期

8 陶玉華;馮金朝;馬麟英;曹書(shū)閣;隆衛(wèi)革;郭耆;;柳州市短周期桉樹(shù)人工林生態(tài)系統(tǒng)碳儲(chǔ)量研究[J];中國(guó)農(nóng)學(xué)通報(bào);2012年07期

9 霍蓮杰;紀(jì)雄輝;吳家梅;朱堅(jiān);;土壤有機(jī)碳分類研究進(jìn)展[J];湖南農(nóng)業(yè)科學(xué);2012年01期

10 梁關(guān)鋒;王紀(jì)杰;俞元春;陳容;崔曉曉;王維;周垂帆;;不同林齡桉樹(shù)人工林土壤有機(jī)碳的變化[J];貴州農(nóng)業(yè)科學(xué);2011年09期

相關(guān)碩士學(xué)位論文 前3條

1 商素云;亞熱帶不同林分土壤有機(jī)碳組分及其結(jié)構(gòu)特征研究[D];浙江農(nóng)林大學(xué);2012年

2 王國(guó)強(qiáng);土地利用變化對(duì)土壤有機(jī)碳和土壤團(tuán)聚體輕組碳的影響[D];福建農(nóng)林大學(xué);2007年

3 覃世贏;厚莢相思人工幼林生物量與生產(chǎn)力和養(yǎng)分循環(huán)的研究[D];廣西大學(xué);2006年

，

本文編號(hào)：1668591