短期增温下青藏高原多年冻土区植物生长季土壤水分的动态变化

干旱区研究 ›› 2019, Vol. 36 ›› Issue (3): 537-545.

• 泛第三极环境与绿色丝路 • 上一篇下一篇

短期增温下青藏高原多年冻土区植物生长季土壤水分的动态变化

李艳萍¹，史利江²,徐满厚¹,李文刚³

1. 太原师范学院地理科学学院，山西晋中 030619；2. 山西财经大学资源环境学院，山西太原 030006；3. 山西省农业科学院农业资源与经济研究所，山西太原 030006

收稿日期:2018-07-30 修回日期:2018-11-06 出版日期:2019-05-15 发布日期:2019-05-15
通讯作者: 史利江
作者简介:李艳萍（1991-），女，在读硕士研究生，研究方向为土壤固碳和土壤水分. E-mail:1842303330@qq.com
基金资助:
国家自然科学基金青年科学基金项目(41501219)；山西省自然科学基金面上项目(2016011085)和山西省高校人文社科重点研究基地项目（2014341）共同资助

Effect of Short-Term Warming on Dynamic Change of Soil Moisture Content in Growing Season in the Permafrost Regions of the Qinghai-Tibet Plateau

LI Yan-ping¹, SHI Li-jiang², XU Man-hou¹, LI Wen-gang

1. College of Geography,Taiyuan Normal University,Jinzhong 030619,Shanxi,China; 2. College of Resources and Environment,Shanxi University of Finance and Economics,Taiyuan 030006,Shanxi,China; 3. Institute of Agricultural Resources and Economics,Shanxi Academy of Agricultural Sciences,Taiyuan 030006,Shanxi,China

Received:2018-07-30 Revised:2018-11-06 Online:2019-05-15 Published:2019-05-15

摘要/Abstract

摘要： 以青藏高原腹地典型高寒草甸植被类型为研究对象，采用红外灯加热的方法模拟全球增温，并利用水分探头，于2012年植物生长季（5—9月）获取0~100 cm不同土层深度土壤水分含量数据，并分析其对增温的响应。结果表明：① 短期增温对高寒草甸土壤水分含量有提高作用，但增幅并不显著（P>0.05），平均提高2.85%。② 土壤水分含量随土层深度的增加呈现先减少后增加的趋势，在10~20 cm土层深度处降为最低值13.8%，在60~100 cm土层深度附近达到了20.57%的最高值；对照组5个月10~20 cm土层深度的土壤水分含量显著低于其他土层，而增温组0~20 cm土层深度的土壤含水量显著低于其他土层深度，表明增温对表层（0~10 cm）的土壤含水量影响较大，对深层土壤含水量的影响则较小，而且短期增温不会对土壤水分的垂直分布趋势产生影响。③ 土壤水分含量随时间的变化，在5—8月呈上升趋势，表明在青藏高原北麓河地区植物生长季，8月是其土壤水分含量最充足的月份，到了9月土壤中含水量开始降低，但5个土层深度降幅均不明显；增温组土壤水分含量随时间的变化趋势与对照组基本一致。

关键词: 土壤水分, 高寒草甸, 模拟增温, 植物生长季, 多年冻土, 青藏高原

Abstract: The typical alpine meadow vegetation types in the hinterland of the Qinghai-Tibet Plateau were taken as the research objects, the global warming was simulated by infrared lamp heating method, the values of soil moisture content at different depths of 0-100 cm in growing season (from May to September) 2012 were obtained by water probe, and its response to warming was analyzed. The results showed that: ① Short-term warming increased soil moisture content in alpine meadow, but the increase was not significant (P≥0.05), and the average increase was 2.85%; ② Soil moisture content decreased at first and then increased with the increase of soil depth, and decreased to the lowest value (13.8%) at the depth of 10-20 cm, and reached the highest value (20.57%) near the depth of 60-100 cm. Soil moisture content at 10-20 cm depth in the control group was significantly lower than that in other soil layers in five months, it at 0-20 cm depth in the warming group was significantly lower than that in other soil layers, which indicated that warming affected significantly the topsoil (0-10 cm deep) moisture content, but slightly the deep-soil moisture content, and the short-term warming had no effect on the vertical distribution of soil moisture content; ③ Soil moisture content was in an increase trend with the time from May to August, which indicated that the soil moisture content in growing season in Beilu River Basin in the Qinghai-Tibet Plateau increased gradually and to its highest value in August, and it began to decrease from September, but the decrease was not significant. The change trend of soil moisture content with the time in the warming group was basically the same as that in the control group.

Key words: soil moisture content, alpine meadow, simulated warming, growing season, permafrost, Qinghai-Tibet Plateau

李艳萍, 史利江, 徐满厚, 李文刚. 短期增温下青藏高原多年冻土区植物生长季土壤水分的动态变化[J]. 干旱区研究, 2019, 36(3): 537-545.

LI Yan-ping, SHI Li-jiang, XU Man-hou, LI Wen-gang. Effect of Short-Term Warming on Dynamic Change of Soil Moisture Content in Growing Season in the Permafrost Regions of the Qinghai-Tibet Plateau[J]. Arid Zone Research, 2019, 36(3): 537-545.

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短期增温下青藏高原多年冻土区植物生长季土壤水分的动态变化

Effect of Short-Term Warming on Dynamic Change of Soil Moisture Content in Growing Season in the Permafrost Regions of the Qinghai-Tibet Plateau

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