本文選題：叢枝菌根 + 退化�。� 參考：《內(nèi)蒙古農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：羊草典型草原是我國(guó)最好的草原類型,在自然因素和人類活動(dòng)的干擾下,多數(shù)已出現(xiàn)不同程度的退化。叢枝菌根(Arbuscular mycorrhiza,簡(jiǎn)稱AM)是草原生態(tài)系統(tǒng)的重要組成成分,對(duì)提高牧草養(yǎng)分吸收、促進(jìn)其生長(zhǎng)發(fā)育、增強(qiáng)抗逆性等具有重要作用。利用AM的綜合作用修復(fù)退化草原是最值得研究的符合草原自然特點(diǎn)的生態(tài)修復(fù)措施。本研究選擇錫林郭勒盟正鑲白旗南部額里圖牧場(chǎng)退化羊草典型草原,進(jìn)行導(dǎo)入菌根接種羊草的修復(fù)研究,通過(guò)比較土壤、羊草、群落指標(biāo)在菌根處理與對(duì)照之間的差異,探索菌根對(duì)退化羊草典型草原的修復(fù)效應(yīng)。主要研究結(jié)論如下：(1)不同處理均表現(xiàn)為0-10cm土層的孢子密度、土壤含水量、養(yǎng)分和球囊霉素含量最高；接種AM真菌對(duì)可增加土壤有機(jī)碳、堿解氮、有效磷、速效鉀以及羊草根圍土壤易提取球囊霉素和總球囊霉素的含量。(2)接種AM真菌增加了羊草的高度、蓋度和地上部生物量,提高了羊草蛋白質(zhì)和養(yǎng)分含量,促進(jìn)了羊草對(duì)土壤氮磷鉀的吸收,降低了群落中羊草的重要值。(3)接種AM真菌促進(jìn)了群落的生長(zhǎng)發(fā)育,增加了群落物種的豐富度,促進(jìn)了群落植物多樣性的形成。
[Abstract]:Leymus chinensis is the best grassland type in China. Arbuscular mycorrhizal arbuscular mycorrhizae (AM) is an important component of grassland ecosystem, which plays an important role in increasing nutrient absorption, promoting growth and development of forage, and enhancing stress resistance. The restoration of degraded grassland by the comprehensive action of AM is the most deserving ecological restoration measure in accordance with the natural characteristics of grassland. In this study, the degraded typical grassland of Leymus chinensis was selected in the south of Zhengxianbai Banner of Xilingol League, and the restoration of Leymus chinensis inoculated with introduced mycorrhiza was studied. The differences of soil, Leymus chinensis and community indexes between mycorrhizal treatment and control were compared. To explore the repair effect of mycorrhizal on degraded Leymus chinensis typical grassland. The main conclusions are as follows: (1) the spore density, soil water content, nutrient content and balloon mycin content in 0-10cm soil layer were the highest in different treatments, and inoculation with AM fungi could increase soil organic carbon, alkali-hydrolyzed nitrogen, available phosphorus, and increase soil organic carbon, alkali-hydrolyzed nitrogen and available phosphorus. The available potassium and the contents of Ballomycin and TBMC were easily extracted from the soil around the root of sheep grass. The inoculation of AM fungi increased the height, coverage and aboveground biomass of Leymus chinensis, and increased the protein and nutrient content of Leymus chinensis. It promoted the absorption of nitrogen, phosphorus and potassium by Leymus chinensis, and decreased the important value of Leymus chinensis in the community. The inoculation of AM fungi promoted the growth and development of the community, increased the richness of species and promoted the formation of plant diversity in the community.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S812

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