The Research On The Change Of Temperature And Humidity After The Forest Fire Clear Cutting Area And Not Cutting Area

In this paper the greater hinggan mountains in forest fire under different mode of operation (forest fire cuttng, forest fire is not cut), choose different fire year (8years fire area,4years fire area), different fire degree (severe fire area, mild fire area) and have the sand, the change of the temperature and humidity of monitoring.throughfall factor analysis of study area and vegetation coverage and the temperature and humidity of correlation analysis factors do. The results follow as:Throughout the growing season (5to9months), fire cutting area atmospheric temperature is greater than non-fire area (P<0.05). Fire cutting area atmospheric temperature is greater than the non-fire area but not significant (P>0.05). Fire all atmospheric temperature in8;4years cutting area, severe fire area and mild fire area than non-fire area have high3.32℃,4.41℃,2.04℃,2.84℃. Fire cutting area not to air temperature in8years,4years severe fire area and mild fire area than non-fire areahave high0.38℃,0.67℃,0.20℃,0.45℃.Air relative humidity, fire cutting area is less than non-fire area (P<0.05), not the atmosphere of the cutting area on fire relative humidity under the sand but have not significant (P>0.05); Air relative humidity is on fire cutting area in eight years,4years severe fire area and mild fire area than non-fire area have low9.32%,11.24%,8.0%,9.78%. Without air relative humidity cutting area on fire in eight years,4years severe fire area and mild fire area than non-fire areahave low3.12%,7.24%,1.48%,5.94%.The soil surface temperature, fire and fire are cutting area were significantly greater than the cutting area not a sand (P<0.05); Soil5cm,10cm,20cm of temperature, the fire is in cutting area,4years significant higher than had the fire area namely (P<0.05),8years than the fire area a sand but not significant (P>0.05); Fire not cutting area5cm soil,10cm,20cm of the temperature, the sand> fire area have but not significant (P>0.05). All of the soil surface cutting area on fire temperature, in eight years,4years severe fire area and mild fire area than non-fire area have6.46℃,9.78℃high,4.42℃,6.64℃; Fire the soil surface temperature not cutting area, in eight years,4year on fire with fire area and mild area fire area than non-fire areahave2.0℃,3.57℃high,1.50℃,3.16℃. The fire is5cm, cutting area soil10cm,20cm of temperature, in8years fire area fire area and mild fire severe than the sand area respectively have big2.96℃,1.64℃,0.94℃,2.48℃,1.32℃,0.58℃.The moisture content of the soil5cm, in cutting area is on fire, the fire area eight years significant higher than4years fire area and the sand had (P<0.05),4years than the fire area a sand but not significant (P>0.05), fire not cutting area5cm of soil moisture content in8years fire area> four years> had the fire area namely between the three significantly (P<0.05);10cm of soil moisture content, in fire and fire are cutting area are not cutting area is8years fire area> four years> had the fire area namely, between the3significantly (P<0.05). Is the fire of felling-area5cm of soil moisture content,8years in the fire area fire area and mild fire severe than the sand area have big respectively2.05%,2.78%; Four years on fire on fire than the area light had0.92%namely. Not the fire cutting area5cm of soil moisture content,8years,4years fire area in severe fire area and mild fire area than the sand had big respectively11.76%,7.56%,7.04%and4.04%; Is the fire of felling-area10cm soil moisture content,8years,4years fire area in severe fire area and mild fire area than the sand had big respectively7.92%,1.14%,8.34%and6.48%; Not the fire cutting area of10cm soil moisture content,8years,4years fire area in severe fire area and mild fire area than the sand had big respectively12.84%,6.67%,7.2%,4.94%.Is the fire of felling-area shrub layer and atmospheric temperature and humidity coverage, soil temperature has a lot of correlation; Not the fire view tree layer and the shrub layer and atmospheric temperature and humidity, coverage of soil temperature has great correlation. The temperature and humidity factor and fire on fire area the correlation of the herb layer covering small. The fire area atmospheric temperature, soil temperature with Joe irrigation layer decreased coverage, air relative humidity with QiaoGuanCao increase with the increase of the coverage. The fire area soil moisture content and the vegetation coverage of smaller correlation.