本文選題：黑河中游 + 土地覆被　； 參考：《中國沙漠》2017年05期

【摘要】：以黑河中游6種典型土地覆被類型(百年灌溉農(nóng)田、新墾灌溉農(nóng)田、人工楊樹林、人工樟子松林、人工梭梭灌木林和天然荒漠草地)為研究對象,對土壤呼吸及其對土壤含水量和土壤溫度的響應(yīng)進(jìn)行測定。結(jié)果表明:灌溉農(nóng)田的土壤呼吸速率顯著大于人工樟子松林地和楊樹林地,人工林地顯著大于荒漠草地和梭梭灌木林地。6種土地覆被類型土壤呼吸速率與土壤溫度顯著正相關(guān)性,Q10值1.14~1.31,表明該地區(qū)土壤呼吸速率對土壤溫度的敏感性低于世界平均水平;土壤呼吸速率與土壤含水量呈顯著的指數(shù)關(guān)系。這表明6種土地覆被類型的土壤呼吸特征存在顯著差異,且不同土地覆被類型的土壤呼吸特征與水熱因子關(guān)系密切,以人類活動為主導(dǎo)的土地覆被變化深刻影響著荒漠綠洲生態(tài)系統(tǒng)水土氣生的相互作用。
[Abstract]:Six typical land cover types (100 years irrigated farmland, newly cultivated irrigated farmland, artificial poplar forest, artificial Pinus sylvestris forest, artificial Haloxylon ammodendron shrub and natural desert grassland) in the middle reaches of Heihe River were studied. Soil respiration and its response to soil water content and soil temperature were measured. The results showed that the soil respiration rate of irrigated farmland was significantly higher than that of artificial Pinus sylvestris forest and poplar forest land. There was a significant positive correlation between soil respiration rate and soil temperature in artificial forest land than in desert grassland and Haloxylon ammodendron shrub, indicating that the sensitivity of soil respiration rate to soil temperature was lower than that of the world average. There was a significant exponential relationship between soil respiration rate and soil moisture content. This indicated that there were significant differences in soil respiration characteristics among six land cover types, and the soil respiration characteristics of different land cover types were closely related to water and heat factors. Land cover change, which is dominated by human activities, has a profound impact on the interaction between soil and water and gas generation in the desert and oasis ecosystem.
【作者單位】： 甘肅省科學(xué)技術(shù)情報(bào)研究所;中國科學(xué)院寒區(qū)旱區(qū)環(huán)境與工程研究所;蘭州石化職業(yè)技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(71363003,41201248,41471210) 中國科學(xué)院西部之光博士項(xiàng)目(Y529881001)
【分類號】：S154
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本文編號：1896776