發(fā)布時(shí)間：2018-04-25 15:28

  本文選題：黑河下游 + 植被類型��； 參考：《干旱區(qū)地理》2017年03期

【摘要】：土壤呼吸的微小變化會(huì)對(duì)大氣CO_2濃度產(chǎn)生重大影響,尤其在極端干旱區(qū)。通過(guò)對(duì)黑河下游額濟(jì)納旗四道橋的混合林、胡楊、檉柳、農(nóng)田及裸地的土壤呼吸進(jìn)行研究,結(jié)果表明:2014年夏季5種不同植被類型的土壤呼吸速率大小排序:胡楊檉柳混合林檉柳農(nóng)田胡楊裸地,各類型的5 cm處土壤溫度和濕度無(wú)明顯變化規(guī)律,土壤溫度在22~35℃,土壤濕度集中在13%~61%的變化范圍。探究了5種不同植被類型的土壤呼吸速率與土壤溫度、土壤濕度、地表溫度、空氣溫度及空氣濕度的線性相關(guān)關(guān)系,發(fā)現(xiàn)它們的土壤呼吸速率與土壤溫度、土壤濕度、空氣溫度、空氣濕度之間無(wú)顯著相關(guān)(P0.05),表明水熱因子對(duì)土壤呼吸的影響具有很大的不確定性。
[Abstract]:Minor changes in soil respiration have a significant impact on atmospheric CO_2 concentrations, especially in extreme arid areas. Through the study on soil respiration of mixed forest, Populus euphratica, Tamarix, farmland and bare land in Ejina Banner, the lower reaches of Heihe River, The results showed that the order of soil respiration rate of five different vegetation types in summer of 2014 was as follows: the soil temperature and humidity of Populus euphratica were not changed at 5 cm, and the soil temperature was 2235 鈩，

本文編號(hào)：1801908