模拟增温对三江源高寒草甸土壤水分的影响  

Effects of simulated warming on soil moisture in the alpine meadow of Sanjiangyuan region

作　　者：范月君[1,2] 姚世庭 赵得萍[4] 畅喜云[2] 李欣 侯向阳[1] FAN Yuejun;YAO Shiting;ZHAO Deping;CHANG Xiyun;LI Xin;HOU Xiangyang(Grassland Research Institute,Chinese Academy of Agriculture Science,Hohhot 010010,China;Qinghai Vocational and Technical College of Animal Husbandry and Veterinary Science,Huangyuan 812100,China;Agricutal and Husbandry College,Qinghai University,Xining 810016,China;Northwest Institute of Plateau,Chinese Academy of Science,Xining 810001,China)

机构地区：[1]中国农业科学院草原研究所,呼和浩特010010 [2]青海畜牧兽医职业技术学院,青海淳源812100 [3]青海大学农牧学院,西宁810016 [4]中国科学院西北高原生物研究所,西宁810001

出　　处：《黑龙江畜牧兽医》2020年第19期21-24,166,共5页Heilongjiang Animal Science And veterinary Medicine

摘　　要：为了研究模拟增温对三江源高寒草甸土壤水分的影响,试验通过开顶式同化箱(open top chamber,OTC)模拟增温同步测定了2015年9月份至2017年9月份OTC增温室内外0~15 cm和15~30 cm土壤温度、含水量,并分析其变化特征。结果表明:OTC的模拟增温效果明显,与未采用OTC的对照相比,0~15 cm和15~30 cm土壤温度分别增加2.41℃和1.27℃;增温导致0~15 cm和15~30 cm的土壤含水量分别增加27.65%和32.17%。OTC模拟增温导致消融和冻结发生变化,使土壤冻结期缩短进而导致整个消融期延长。说明增温对三江源高寒草甸土壤水源涵养功能的发挥有一定影响。In order to estimate the effect of simulated warming on soil moisture in the alpine meadow of Sanjiangyuan region the temperature and water content of,0-15 cm and 15-30 cm in indoor and outdoor of open top chamber(OTC)greenhouses from September 2015 to September 2017 were measured simultaneously through OTC simulation of temperature increase,and their variation characteristics were analyzed.The results showed that the simulated temperature increase effect of OTC was obvious.Compared with the control without OTC,the soil temperature of 0-15 cm and 15-30 cm increased by 2.41℃and 1.27℃,respectively.The soil water content of 0-15 cm and 15-30 cm increased by 27.65%and 32.17%respectively,due to the increasing temperature.Meanwhile,OTC simulated warming led to changes in ablation and freezing,shortening the freezing period of soil and prolonging the ablation period.The results indicated that the temperature increase has a certain effect on the soil water conservation function of alpine meadow in Sanjiangyuan regions.

关 键 词：土壤含水量 水源涵养功能 模拟增温 高寒草甸 三江源 

分 类 号：S152.7[农业科学—土壤学]