[Objective] The research was aimed to study the dynamics of slope runoff and soil erosion in different forest types in karst depression.[Method] Precipitation observation sites at the bottom of karst depression and ru...[Objective] The research was aimed to study the dynamics of slope runoff and soil erosion in different forest types in karst depression.[Method] Precipitation observation sites at the bottom of karst depression and runoff observation sites in different forest types were established to monitor regularly the main indices changes of runoff and soil erosion at fixed position in 4 years.[Result] The surface runoff of different forest types appeared singer peak from February to November,with lowest valley from June to July.The runoff coefficient appeared double peaks from February to May and from July to September.The changing coefficient of runoff appeared three peaks from March to April,from July to August and from September to November.The silt concentration appeared one peak from March to May and The erosion modulus appeared double peaks from March to May and from June to August.Runoff showed annually reduced trend with the growth of forests and the development of vegetation layer＇s structure.There was a positive correlation between the runoff and its silt concentration in different forest types.Precipitation and evaporation had notable positive correlation with the runoff,and similar correlation but not marked with silt concentration.The fitting analysis results of surface runoff and erosion modulus showed that rocky desertification intensified the unevenness of surface runoff and increased the surface runoff and erosion modulus.The penetrability of surface soil in new planted forest was lower than that in young forest,and that in surface soil of different forest types was higher than in bottom soil.[Conclusion] The research provided theoretical basis for the biological management technologies of water and soil conservation and the control of karst rocky desertification in karst regions.展开更多
【目的】观察全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗儿童闭塞性细支气管炎（bronchiolitis obliterans ，BO）的临床效果，为临床治疗提供参考依据。【方法】收集2010年1月至2014年3月来本科就诊的临床诊断为 BO 的儿童患...【目的】观察全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗儿童闭塞性细支气管炎（bronchiolitis obliterans ，BO）的临床效果，为临床治疗提供参考依据。【方法】收集2010年1月至2014年3月来本科就诊的临床诊断为 BO 的儿童患者50例，采用随机数字表法将其随机分为观察组与对照组组各25例，两组均给予常规对症支持治疗，对照组给予全身糖皮质激素口服，观察组采用全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗，测量两组患者治疗前后喘息控制测试的得分及两组患者治疗前后的临床表现总得分，比较两组患者的临床治疗效果。【结果】观察组与对照组在治疗前的喘息得分及临床表现总得分之间的差异均无统计学意义（ P ＞0．05），而治疗后观察组的喘息得分及临床表现总得分较对照组的低且差异均具有统计学意义（ P ＜0．05）；治疗后观察组的总有效率为92．0％，而对照组的总有效率为60．0％，两组之间的差异具有统计学意义（χ^2＝7．018，P ＝ 0．008）。【结论】全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗儿童 BO 的临床效果显著，推荐在临床上应用。展开更多
基金Supported by 973 Project of National Basic Research Program of China(2006CB403200 )Science and Technology Program of Guizhou Province (S2007-1021,2008-73,TZJF2008-17)National Scientific and Technological Support Project of China(2006BAD03-A0303)~~
文摘[Objective] The research was aimed to study the dynamics of slope runoff and soil erosion in different forest types in karst depression.[Method] Precipitation observation sites at the bottom of karst depression and runoff observation sites in different forest types were established to monitor regularly the main indices changes of runoff and soil erosion at fixed position in 4 years.[Result] The surface runoff of different forest types appeared singer peak from February to November,with lowest valley from June to July.The runoff coefficient appeared double peaks from February to May and from July to September.The changing coefficient of runoff appeared three peaks from March to April,from July to August and from September to November.The silt concentration appeared one peak from March to May and The erosion modulus appeared double peaks from March to May and from June to August.Runoff showed annually reduced trend with the growth of forests and the development of vegetation layer＇s structure.There was a positive correlation between the runoff and its silt concentration in different forest types.Precipitation and evaporation had notable positive correlation with the runoff,and similar correlation but not marked with silt concentration.The fitting analysis results of surface runoff and erosion modulus showed that rocky desertification intensified the unevenness of surface runoff and increased the surface runoff and erosion modulus.The penetrability of surface soil in new planted forest was lower than that in young forest,and that in surface soil of different forest types was higher than in bottom soil.[Conclusion] The research provided theoretical basis for the biological management technologies of water and soil conservation and the control of karst rocky desertification in karst regions.
文摘【目的】观察全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗儿童闭塞性细支气管炎（bronchiolitis obliterans ，BO）的临床效果，为临床治疗提供参考依据。【方法】收集2010年1月至2014年3月来本科就诊的临床诊断为 BO 的儿童患者50例，采用随机数字表法将其随机分为观察组与对照组组各25例，两组均给予常规对症支持治疗，对照组给予全身糖皮质激素口服，观察组采用全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗，测量两组患者治疗前后喘息控制测试的得分及两组患者治疗前后的临床表现总得分，比较两组患者的临床治疗效果。【结果】观察组与对照组在治疗前的喘息得分及临床表现总得分之间的差异均无统计学意义（ P ＞0．05），而治疗后观察组的喘息得分及临床表现总得分较对照组的低且差异均具有统计学意义（ P ＜0．05）；治疗后观察组的总有效率为92．0％，而对照组的总有效率为60．0％，两组之间的差异具有统计学意义（χ^2＝7．018，P ＝ 0．008）。【结论】全身糖皮质激素联合布地奈德、异丙托溴铵雾化吸入治疗儿童 BO 的临床效果显著，推荐在临床上应用。
