本文關鍵詞： 溫度 降水 牧草氣候生產(chǎn)力 錫林郭勒 不同草原　出處：《內蒙古農業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：通過內蒙古錫林郭勒盟三種草地類型區(qū)即典型草原的烏珠穆沁草原、荒漠草原的蘇尼特草原和農牧交錯帶太仆寺旗和多倫縣近40年的年均氣溫、降水量數(shù)據(jù)的搜集整理,利用Thornthwaite Memorial模型計算出三種草地類型區(qū)的牧草氣候生產(chǎn)力。對三種草地類型區(qū)所包含的6個旗縣近40年的年均氣溫、年降水量、牧草氣候生產(chǎn)力數(shù)據(jù)匯總,并進行方差分析、相關分析和回歸分析。結果表明：(1)近40年錫林郭勒盟三種草地類型區(qū)的大氣溫度呈增加趨勢,降雨量在前30年內增加,而后10年降低。牧草氣候生產(chǎn)力與降水的變化趨勢一致。(2)年均氣溫、年降水量對牧草氣候生產(chǎn)力的相關性極其顯著,年均氣溫對牧草氣候生產(chǎn)力的相關系數(shù)為-0.37599,對年降水量的相關系數(shù)為-0.43793；年降水量對牧草氣候生產(chǎn)力的相關系數(shù)為0.95715。(3)錫林郭勒盟三種草地類型的牧草氣候生產(chǎn)力受溫度和降水的影響,其中降水是影響牧草生產(chǎn)力的主導因子。隨著年降水量的增加,三種草地類型區(qū)牧草氣候生產(chǎn)力增加。農牧交錯帶及典型草原區(qū)的西烏珠穆沁旗牧草氣候生產(chǎn)力隨著年均溫的增加而增加,而對于典型草原區(qū)的東烏珠穆沁旗和荒漠草原區(qū),當年降水量低于某個閥值時,牧草氣候生產(chǎn)力隨溫度的增加而減��；當年降水量高于閥值時,牧草氣候生產(chǎn)力隨溫度的增加而增加。
[Abstract]:Through the collection of annual average temperature and precipitation data of the three grassland types in Xilinguole League of Inner Mongolia, namely, the typical grassland of Wuzhimuqin steppe, the desert steppe of the Sunita steppe and the farming-pastoral interlaced belt Taipusi Banner and Duolun County, the annual average temperature and precipitation data have been collected and collated. The climatic productivity of forage grass was calculated by Thornthwaite Memorial model. The annual average air temperature, annual precipitation and climatic productivity of forage grass in the six flag counties of the three grassland types were collected, and the variance analysis was carried out. The results of correlation analysis and regression analysis showed that the atmospheric temperature of the three grassland types in Xilinguole League increased in the last 40 years, and the rainfall increased in the first 30 years. The annual air temperature and annual precipitation were significantly correlated with the climatic productivity of forage. The correlation coefficient between annual air temperature and forage climate productivity is -0.37599, the correlation coefficient for annual precipitation is -0.43793, and the correlation coefficient between annual precipitation and forage climate productivity is 0.95715.93. The effects of temperature and precipitation, Precipitation is the main factor affecting forage productivity. With the increase of annual precipitation, The climatic productivity of herbage in the three grassland types increased with the increase of annual mean temperature, but for the eastern Uzhimuqin flag and desert steppe in the typical steppe, the climatic productivity increased with the increase of annual mean temperature in the farming-pastoral ecotone and the typical grassland. When the precipitation was below a certain threshold, the climatic productivity of forage decreased with the increase of temperature, and when the precipitation was above the threshold, the climatic productivity of forage increased with the increase of temperature.
【學位授予單位】：內蒙古農業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S812

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本文編號：1550069