| 呼伦贝尔半干旱草原土壤水分及干旱特征分析 |
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| 引用本文： | 王彦平,李学红,宋卫士.呼伦贝尔半干旱草原土壤水分及干旱特征分析[J].天津农业科学,2012,18(5):61-63. |
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| 作者姓名： | 王彦平 李学红 宋卫士 |
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| 作者单位： | 内蒙古呼伦贝尔市气象局,内蒙古海拉尔,021008 |
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| 摘 要： | 利用呼伦贝尔鄂温克牧业气象观测站1988─2010年的土壤水分观测资料进行分析,结果表明:呼伦贝尔半干旱草原0～50cm土壤水分含量以每年0.2667%的速度逐年减小,土壤干旱化程度加重;土壤各层平均相对湿度春季最小,秋季次之,夏季土壤含水量最高;从干旱特征季节分析,春季是一年中最干旱的季节,土壤各层平均相对湿度不足50%,各等级干旱发生频次均较高,夏、秋两季土壤含水量状况有所改善,但各等级干旱发生频次仍然较高;春、夏、秋三季连旱是呼伦贝尔草原的主要气候特点,体现了半干旱草原的显著气候特征。
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| 关 键 词： | 呼伦贝尔 半干旱草原 土壤水分 干旱特征 |
Analysis of Soil Moisture and Drought Features in Hulunbeier Semi- drought Grasslands |
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| WANG Yan-ping
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LI Xue-hong
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SONG Wei-shi.Analysis of Soil Moisture and Drought Features in Hulunbeier Semi- drought Grasslands[J].Tianjin Agricultural Sciences,2012,18(5):61-63. |
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| Authors: | WANG Yan-ping LI Xue-hong SONG Wei-shi |
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| Institution: | (Weather Bureau of Hulunbeier, Hailaer,Inner Mongolia 021008,China) |
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| Abstract: | Analysed soil moisture data of Ewenke Animal-meteorological Experiment Station from 1988 to 2007.The results showed that the soil moisture content of 0 ~ 50 cm declined year by year in the rate of 0.2667%·a-1, soil drought degree increased.The average relative humidity of every soil layer was spring >autumn>summer.From analysis of the characteristics of seasonal distribution of drought, we could know that spring was the best season of drought, soil layer average relative humidity is less than 50%, each grade of drought occurrence frequency is higher, the soil moisture status improved in summer and autumn ,but each grade of drought occurrence frequency is still high.The grasslands in Hulunbeier continuous drought in spring, summer,autumn and three quarter reflects significantly the climate characteristics of semi- drought grasslands. |
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| Keywords: | Hulunbeier semi- drought grasslands soil moisture drought features |
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