摘要
在黑龙江省水利科学研究院水利试验研究中心的综合实验观测场,利用2011年11月-2012年4月一个冬季冻融循环期的实测黑土耕层剖面土壤湿度和温度数据,对典型中-深季节冻土区黑土耕层土壤湿度与冻结融化期土壤温度变化进行研究.根据阳坡的黑土耕层土壤浅层1 cm、5 cm、10 cm及15 cm四种不同深度,对冻融循环过程中土壤湿度随冻结融化期土壤温度变化特征进行分析,研究黑土耕层土壤冻融过程中不同深度土壤水分的变化情况,了解降水和温度对不同深度土壤湿度变化的影响.结果表明:在北京时间08:00、14:00及20:00,阳坡15 cm、10 cm、5 cm及1 cm深度黑土耕层土壤湿度随冻结融化期土壤温度变化的线性相关可决系数分别为0.9298、0.9216、0.5989、0.7281,斜率平均标准偏差分别为0.017、0.019、0.095、0.056,截距平均标准偏差分别为0.17、0.25、1.31、0.83.阳坡10 cm及15 cm深度的黑土耕层土壤湿度随冻结融化期土壤温度变化呈十分显著的线性相关关系.阳坡5 cm深度的黑土耕层土壤湿度在冻结融化期与土壤温度变化线性关系稍微显著.在整个冻结融化期,因受太阳辐射、降水及蒸发的强烈影响,阳坡浅层1 cm深度黑土耕层土壤湿度与土壤温度线性相关性不如10 cm及15 cm深度的关系显著,但比5 cm深度的关系显著.
Soil moisture in the black soil plowlayer changing with temperature in freeze-thawcycle period was studied in a seasonal frozen soil area. There is a Water Conservancy Comprehensive Experimental Research Center of Heilongjiang Province of China in the outskirts of Harbin,where a typical middle-deep seasonal frozen soil experimental observation field was run from November 2011 to April 2012. The measured data of soil moisture and soil temperate within the black soil plowlayer were analyzed. The analyzed items included the characteristics of plowlayer of black soil moisture on the sunny slopes changing with the freeze-thawcycles and soil temperature in the process of freeze-thawcycles in the depths of 1 cm,5 cm,10 cm and 15 cm. It is found that the plowlayer of black soil moisture is significantly different at different depths in the freeze-thawprocess,depending on precipitation and soil temperature. The results showthat at 08: 00 am,14: 00 pm and 20: 00 pm( Beijing time),moistures of plowlayer of black soil on sunny slopes at the depths of 15 cm,10 cm,5 cm and1 cm in the freeze-thawcycle period change with the soil temperature with a linear correlation coefficient of determination of 0. 9298,0. 9216,0. 5989,0. 7281,respectively,with a slope average standard deviation of 0. 017,0. 019,0. 095,0. 056,respectively,and with an intercept average standard deviation of 0. 17,0. 25,1. 31,0. 83,respectively. On sunny slopes,plowlayer of black soil moistures at the depths of 10 cm and 15 cm change with freeze-thawsoil temperature with a linear relationship remarkably. On sunny slopes,plowlayer of black soil moisture at the depths of 5 cm changes with the soil temperature with a linear relationship significantly a bit. Due to the influence of solar radiation,precipitation and evaporation,between moisture and temperature of plowlayer of black soil at the depth of 1 cm on sunny slopes is linear correlation still throughout the freeze-thawperiod. However,the linear correlation between moisture and temperature at the depth of 1 cm is not as good as those at the depth of 10 cm and 15 cm,but better than that at the depth of 5 cm. Besides,it is necessary to further study the black soil plowlayer moisture changing with temperature in the winter when there is a plenty snowfall winter.
出处
《冰川冻土》
CSCD
北大核心
2015年第4期931-939,共9页
Journal of Glaciology and Geocryology
基金
国家自然科学基金项目(41201264
40901136)
黑龙江省青年科学基金项目(QC2010099)资助
关键词
黑土耕层土壤
土壤湿度
土壤温度
冻结融化期
plow layer of black soil
soil moisture
soil temperature
freeze-thaw cycle period
