本文選題：渾善達克沙地 + 氫氧穩(wěn)定同位素　； 參考：《內(nèi)蒙古農(nóng)業(yè)大學》2017年碩士論文

【摘要】：本文以內(nèi)蒙古渾善達克沙地南緣地帶人工種植楊樹林為研究對象,基于氫氧穩(wěn)定同位素示蹤的技術(shù),從定性與定量的角度對2015.04～2016.10年楊樹生育期內(nèi)植物的主要水分來源進行分析,確定楊樹獨特的水分利用模式;同時利用熱擴散莖流計與氣象站長期監(jiān)測植株樹干液流量與周圍相關(guān)環(huán)境因子,并基于雙涌源模型計算楊樹生育期的蒸騰量;結(jié)合分析當?shù)厣鷳B(tài)系統(tǒng)中楊樹的的水分循環(huán)與植被的吸耗水機理,明確其在不同生態(tài)環(huán)境的應(yīng)對機制,為實現(xiàn)干旱半干旱地區(qū)水資源的優(yōu)化配置、恢復(fù)當?shù)氐纳鷳B(tài)環(huán)境和可持續(xù)發(fā)展提供理論依據(jù),主要研究結(jié)果如下:(1)從不同時間尺度對不同水體(大氣降水、土壤水、地下水以及植物水)氫氧同位素組成,降水氫氧同位素特征的環(huán)境效應(yīng)和季節(jié)效應(yīng)等進行分析并分別擬合該地區(qū)2015、2016兩年大氣降水線(δ D=7.385δ18O+3.0097、δ D=7.61δ18O+2.5011),斜率全部小于全球降水線方程的斜率。(2)基于多源線性混合模型,利用氫氧穩(wěn)定同位素示蹤技術(shù),通過直觀做圖對比楊樹莖干水分的δ18O穩(wěn)定同位素和各可能水分來源的δ18O穩(wěn)定同位素進而定性判斷楊樹的主要吸水層位。并對楊樹生育期內(nèi)各潛在水源對的水分貢獻率,通過Isosource軟件進行定量計算。并由此總結(jié)出的楊樹水分利用模式,從而研究楊樹對其生長環(huán)境的應(yīng)對機制。(3)根據(jù)研究期內(nèi)楊樹的生理特征以及其他環(huán)境因子測量值(前期降水量值、LAI、土壤含水量以及地下水位),結(jié)合楊樹根系的水分利用模式,利用SPSS軟件進行回歸分析,定量分析出相對應(yīng)影響因素對該水源貢獻率變化造成的影響。(4)基于能量平衡和微氣象學方法,根據(jù)當?shù)貧庀髷?shù)據(jù)和楊樹的生理生態(tài)特征的實測數(shù)據(jù),利用雙涌源模型模擬計算楊樹的冠層耗水量,從而得出人工種植楊樹在其生育期內(nèi)耗水量為343.92mm,利用測耗水量對其進行有效性檢驗。(5)結(jié)合楊樹在生育期的吸耗水以及降水分布情況,定性與定量分析楊樹在生育期內(nèi)蒸騰耗水當?shù)亟邓c之間的水量平衡;并分析植物的蒸騰作用與土壤水調(diào)蓄水分之間的相互作用;通過量化不同月份楊樹對各潛在水源的利用量,進而分析蒸騰作用對楊樹根系吸水來源選擇的影響,最后得出楊樹根系在干旱環(huán)境下的動態(tài)反應(yīng)機制。
[Abstract]:In this paper, the artificial planted poplar forests in the southern margin of Hunshandake Sandy Land in Inner Mongolia were studied. Based on the technique of hydrogen and oxygen stable isotope tracing, the main water sources of poplar during the growing period of 2015.04 ~ 2016.10 were analyzed qualitatively and quantitatively. To determine the unique water use model of poplar, to use heat diffusion stem flow meter and weather station to monitor the sap flow and environmental factors, and to calculate the transpiration of poplar growth period based on double surge source model. In order to realize the optimal allocation of water resources in arid and semi-arid areas, the water cycle of poplar and the mechanism of water absorption and consumption of vegetation in local ecosystem are analyzed, and the coping mechanism of poplar in different ecological environment is clarified. Restoring the local ecological environment and providing the theoretical basis for sustainable development. The main results are as follows: 1) hydrogen and oxygen isotopic compositions of different water bodies (atmospheric precipitation, soil water, groundwater and plant water) from different time scales. The environmental effects and seasonal effects of hydrogen and oxygen isotopic characteristics of precipitation in the region were analyzed and fitted for the two years of 2015 and 2016, respectively. The precipitation lines (未 DX 7.385 未 18O 3.0097, 未 DU 7.61 未 18O 2.5011g, slope less than the slope of the global precipitation line equation, respectively) are based on a multi-source linear mixed model. By using hydrogen and oxygen stable isotope tracer technique, the 未 18O stable isotopes of poplar stem water and the 未 18O stable isotopes of various possible water sources were compared and the main absorbent layers of poplar were judged qualitatively. The water contribution rates of potential water sources during poplar growth period were calculated quantitatively by Isosource software. And thus concluded the poplar water use model, Therefore, the response mechanism of poplar to its growth environment was studied. (3) according to the physiological characteristics of poplar and other environmental factors (early precipitation value, soil water content and groundwater level), the model of poplar root water use was combined. Based on the energy balance and micrometeorology method, based on the local meteorological data and the measured data of the physiological and ecological characteristics of poplar, the effect of the corresponding factors on the variation of the contribution rate of the water source was quantitatively analyzed by using the SPSS software. The water consumption in the canopy of poplar was simulated by using double surge source model. It is concluded that the water consumption of poplar planted artificially is 343.92 mm during its growing period, and the availability of poplar is tested by measuring water consumption. Qualitative and quantitative analysis of poplar transpiration water consumption in the growth period and water balance between the local precipitation and analysis of plant transpiration and soil water storage interaction; By quantifying the potential water use of poplar in different months, and then analyzing the influence of transpiration on the selection of water absorption source of poplar roots, the dynamic response mechanism of poplar roots in arid environment was obtained.
【學位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S792.11

【參考文獻】

相關(guān)期刊論文 前10條

1 包秀霞;廉勇;包秀平;;旱生植物抗旱機制研究進展[J];北方農(nóng)業(yè)學報;2016年06期

2 郭少峰;賈德彬;王蓉;菅晶;;內(nèi)蒙古正藍旗大氣降水氫氧穩(wěn)定同位素特征分析[J];中國科技論文;2015年21期

3 周海;鄭新軍;唐立松;李彥;;鹽生荒漠土壤水穩(wěn)定氫、氧同位素組成季節(jié)動態(tài)[J];中國沙漠;2014年01期

4 賈國棟;余新曉;鄧文平;樊登星;;北京山區(qū)典型樹種土壤水分利用特征[J];應(yīng)用基礎(chǔ)與工程科學學報;2013年03期

5 鄧文平;余新曉;賈國棟;李亞軍;劉玉潔;白艷婧;;利用穩(wěn)定氫氧同位素定量區(qū)分栓皮櫟旱季水分來源的方法比較[J];應(yīng)用基礎(chǔ)與工程科學學報;2013年03期

6 楊弘;楊威;;森林土壤水分入滲的影響因素及主要入滲模型[J];吉林師范大學學報(自然科學版);2013年02期

7 李業(yè)清;邱均生;;試論森林水量平衡[J];科技創(chuàng)新與應(yīng)用;2012年11期

8 鞏國麗;陳輝;段德玉;;利用穩(wěn)定氫氧同位素定量區(qū)分白刺水分來源的方法比較[J];生態(tài)學報;2011年24期

9 侯典炯;秦翔;吳錦奎;杜文濤;;烏魯木齊大氣降水穩(wěn)定同位素與水汽來源關(guān)系研究[J];干旱區(qū)資源與環(huán)境;2011年10期

10 聶云鵬;陳洪松;王克林;;石灰?guī)r地區(qū)連片出露石叢生境植物水分來源的季節(jié)性差異[J];植物生態(tài)學報;2011年10期

相關(guān)博士學位論文 前2條

1 韓磊;黃土半干旱區(qū)主要造林樹種蒸騰耗水及冠層蒸騰模擬研究[D];北京林業(yè)大學;2011年

2 朱仲元;干旱半干旱地區(qū)天然植被蒸散發(fā)模型與植被需水量研究[D];內(nèi)蒙古農(nóng)業(yè)大學;2005年

相關(guān)碩士學位論文 前2條

1 閆雪;科爾沁沙丘—草甸過渡帶人工楊樹林耗水規(guī)律與尺度擴展研究[D];內(nèi)蒙古農(nóng)業(yè)大學;2016年

2 趙宏瑾;渾善達克沙地天然榆樹耗水量及蒸騰與光合速率對環(huán)境的響應(yīng)研究[D];內(nèi)蒙古農(nóng)業(yè)大學;2015年

，

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