内蒙古农业科技
內矇古農業科技
내몽고농업과기
INNER MONGOLIA AGRICULTURAL SCIENCE AND TECHNOLOGY
2015年
4期
40-43
,共4页
荒漠草原%增温效应%小气候%日较差
荒漠草原%增溫效應%小氣候%日較差
황막초원%증온효응%소기후%일교차
Desert Steppe%Simulated warming effect%Microclimate%The daily range of temperature
内蒙古荒漠草原是草原向荒漠过渡的旱生性最强的草地生态系统,气候干旱,生态环境十分脆弱,气候变化对荒漠草原的影响更为突出.在国际冻原计划(ITEX)模拟增温效应对植物影响的研究方法基础上,采用20 cm、30 cm、40 cm、50 cm、60 cm五种高度的开顶式生长室(OTC),研究了荒漠草原小气候对增温效应的动态响应. 研究结果表明,地上20 cm范围内的空气温度对增温效应的响应大于地下20 cm范围内土壤温度对增温效应的响应, 地下5 cm土壤温度的响应程度明显大于地下10 cm土壤温度;OTC内的日较差较对照草地更大,同等底面积的OTC,高度越大,室内的日较差变化越明显,即OTC内的气温日较差随高度增加而增大,且晴天比阴天更明显.
內矇古荒漠草原是草原嚮荒漠過渡的旱生性最彊的草地生態繫統,氣候榦旱,生態環境十分脆弱,氣候變化對荒漠草原的影響更為突齣.在國際凍原計劃(ITEX)模擬增溫效應對植物影響的研究方法基礎上,採用20 cm、30 cm、40 cm、50 cm、60 cm五種高度的開頂式生長室(OTC),研究瞭荒漠草原小氣候對增溫效應的動態響應. 研究結果錶明,地上20 cm範圍內的空氣溫度對增溫效應的響應大于地下20 cm範圍內土壤溫度對增溫效應的響應, 地下5 cm土壤溫度的響應程度明顯大于地下10 cm土壤溫度;OTC內的日較差較對照草地更大,同等底麵積的OTC,高度越大,室內的日較差變化越明顯,即OTC內的氣溫日較差隨高度增加而增大,且晴天比陰天更明顯.
내몽고황막초원시초원향황막과도적한생성최강적초지생태계통,기후간한,생태배경십분취약,기후변화대황막초원적영향경위돌출.재국제동원계화(ITEX)모의증온효응대식물영향적연구방법기출상,채용20 cm、30 cm、40 cm、50 cm、60 cm오충고도적개정식생장실(OTC),연구료황막초원소기후대증온효응적동태향응. 연구결과표명,지상20 cm범위내적공기온도대증온효응적향응대우지하20 cm범위내토양온도대증온효응적향응, 지하5 cm토양온도적향응정도명현대우지하10 cm토양온도;OTC내적일교차교대조초지경대,동등저면적적OTC,고도월대,실내적일교차변화월명현,즉OTC내적기온일교차수고도증가이증대,차청천비음천경명현.
Desert Steppe in Inner Mongolia grassland is the most drought grassland ecosystem which transit to the desert. Under a dry climate, the ecological environment is fragile, the impact of climate change on the fragile Desert Steppe ecosystem is more prominent. In this paper, based on the international tundra plan (ITEX) simulated warming effects on plants, using 20cm, 30cm, 40cm, 50cm, 60cm of five highly Open-top chamber (OTC), to study the dynamic response on the microclimate of Desert Steppe The results showed that, The impact of warming control using OTC to the above-ground air temperature of 20cm was greater than the impact on soil temperature, and the soil temperature of underground 5cm was greater than soil temperature of underground 10cm; Daily maximum temperature of OTC was higher than control processing, but daily minimum temperature was lower than the control processing; OTC of the same base area, the higher of the height, the higher of its daily maximum temperature, and the lower of its daily minimum temperature. that to say, along with the height increase, the daily range of temperature in OTC increase. and sunny day was obvious than cloudy day.
