本文選題：氣候變化 + 克氏針茅草原�。� 參考：《內(nèi)蒙古大學(xué)》2017年碩士論文

【摘要】：隨著全球氣候變暖的日益加劇,溫度升高和降水格局的變化已毋庸置疑。內(nèi)蒙古克氏針茅草原地處干旱半干旱地區(qū),對(duì)氣候環(huán)境的變化響應(yīng)敏感,研究?jī)?nèi)蒙古典型草原對(duì)氣候變化的響應(yīng)有助于確定未來氣候變化下草原生態(tài)系統(tǒng)的適應(yīng)方式。本文以內(nèi)蒙古克氏針茅草原為研究對(duì)象,在2011年生長(zhǎng)季利用開頂式生長(zhǎng)室(OTC)對(duì)其進(jìn)行增溫增雨試驗(yàn),探討草地微生物和土壤酶活性對(duì)氣候變化的響應(yīng)機(jī)理,以期為未來氣候變化提供基礎(chǔ)數(shù)據(jù)和理論依據(jù)。主要包括以下結(jié)論:(1)增溫處理顯著增加了土壤溫度,降低了土壤濕度;增雨處理顯著增加土壤濕度而降低了土壤溫度。增溫、增雨及交互作用對(duì)土壤pH、有機(jī)質(zhì)、全氮、銨態(tài)氮、全磷、速效磷的含量沒有顯著影響,T和TP處理顯著增加硝態(tài)氮的含量。(2)CT(控溫處理)、T(增溫處理)、P(增雨處理)和TP(增溫增雨處理)處理后,過氧化氫酶活性均有一定程度的增加,但是與CK處理未達(dá)到顯著性水平。CT、P和TP處理的脲酶活性顯著提高,而T處理無明顯的變化。CT、T、P和TP處理的堿性磷酸酶活性均有下降的趨勢(shì),CT處理的酶活性顯著下降。CT、T、P和TP處理后的蔗糖酶活性有不同程度的波動(dòng),但與CK處理均未形成顯著性差異。(3)生長(zhǎng)季和實(shí)驗(yàn)處理對(duì)土壤細(xì)菌和真菌的多樣性一定影響,但是影響均不顯著。群落相似性分析表明增溫和增溫及交互作用在一定程度上改變了土壤微生物群落的結(jié)構(gòu)。(4)不同土壤酶活性受到土壤理化指標(biāo)的影響不同。不同土壤理化指標(biāo)對(duì)土壤微生物多樣性的影響不同。微生物多樣性和酶活性的關(guān)系沒有規(guī)律性。(5)增溫、增雨及交互作用影響土壤微生物多樣性與土壤溫濕度之間的關(guān)系,并未表現(xiàn)出特異性規(guī)律。
[Abstract]:With the increasing global warming, there is no doubt that temperature rise and precipitation pattern change. Neopodium krjabini is located in arid and semi-arid area, and is sensitive to the change of climate environment. The study of the response of typical grassland to climate change in Inner Mongolia is helpful to determine the adaptation of grassland ecosystem under future climate change. In this paper, the experiment of warming and increasing rain was carried out by using OTC in the growth season of Inner Mongolia, and the response mechanism of microorganism and soil enzyme activity to climate change was discussed. In order to provide basic data and theoretical basis for future climate change. The main conclusions are as follows: (1) the increase of temperature significantly increased the soil temperature, decreased the soil moisture, and increased the soil moisture significantly and decreased the soil temperature under the rain treatment. Soil pH, organic matter, total nitrogen, ammonium nitrogen, total phosphorus, The content of available phosphorus had no significant effect on the content of nitrate-N. The activity of catalase increased to a certain extent after the treatments of temperature control treatment (temperature control treatment) and TP (temperature treatment) and TP( treatment) increased the content of nitrate-N, and the activity of catalase increased to a certain extent after the treatments of temperature control treatment (temperature control treatment) and TP treatment (temperature control treatment) and TPtreatment (temperature and precipitation treatment), respectively. However, the urease activity of the treatments with CK and CK did not reach the significant level. The activity of alkaline phosphatase (ALP) decreased in both CTT and TP treatments. The enzyme activity of CT treatment decreased significantly. The sucrase activity fluctuated in different degrees after treatment with CTT and TP. However, there was no significant difference between the treatments and CK treatments. The growth season and experimental treatment had a certain effect on the diversity of soil bacteria and fungi, but the effects were not significant. Community similarity analysis showed that warming, warming and interaction changed the structure of soil microbial community to a certain extent) different soil enzyme activities were affected by soil physical and chemical indexes. Different soil physical and chemical indexes have different effects on soil microbial diversity. The relationship between microbial diversity and enzyme activity was not regular.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S812.2

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