Study On Schima Superba Gardn. Et Champ. Biological Fire Prevention Forest Microclimate And Soil Nutrient In Nanchang MeiLiog

Content:The construction of Biological fire prevention forest is an important forestfireproofing strategy project and related to forest resources ecological safety and people’slife and property security， it is one of the important forest fire prevention measures.Biological fire prevention forest belt with to prevent the fire from spreading and extending,prevent flammable plants burning at different levels. To carry out the Schima superbaforest fire prevention microclimate and soil nutrient fire environment research of themechanism of fire prevention and fire theory, protect forest resources and ecologicalenvironment has important significance. Testbed choice in Changling forestfarm,Nanchang city.17km long schima superba forest fire prevention, grew well. Set thespring, summer, autumn, winter forest microclimate observation and the determination ofsoil nutrient inside and outside, the experimental data with SPSS statistical methods ofanalysis of variance and analysis.The results showed that:Different seasons within the forest fire prevention reuniting the open can reduce thedaily average temperature0.1℃to1.8℃，The maximum cooling rate level of each seasonis for spring (20㎝), summer(2ocm), autumn (20㎝), winter (150㎝)； Forest fireprevention in different seasons in a reunite empty can improve the daily average airrelative humidity of1.2%-45%，Summer, of which20to50cm to add wet effect is mostobvious, increased by45%-14%;100-150cm in spring and winter humidification effect isobvious, increased by7.8%-10%; Temperature1.0℃, autumn and winter can beincreased by4%-5%relative humidity.Forest fire prevention effect significantly on light and wind speed,5.97%lowerspring forest light intensity inside than the outside, the wind speed is lower15.2%.Summer forest light intensity is lower than reunite36.2%,44.1%lower than thewind.Autumn forest light intensity is lower than reunite47.1%,13.4%lower wind speed;Winter forest light intensity is lower than reunite48.2%, lower wind speed of24.5%.Each season forest pH value were lower than reunite, the year average forest soil pHvalue of5.40, reunite of5.58,4%lower forest inside than the outside areas of organicmatter, total nitrogen, alkali solution nitrogen, rapidly-available potassium, availablephosphorus content are significantly higher inside than outside, and presents the contentdecrease with depth; Significant difference was found in all kinds of nutrient contentbetween different seasons, organic matter, total nitrogen, alkali solution nitrogen,rapidly-available potassium content is higher in spring and summer season, and theavailable p content is higher in autumn and winter season, the content of the spring andsummer is less.Each season forest soil temperature inside and outside present decreasing with theincrease of the depth of the law, in three seasons, spring, summer, winter, some corresponding relations between soil nutrient and soil temperature. Spring forest inside andoutside the alkali solution nitrogen, rapidly-available potassium, organic matter content ispositively correlated with soil temperature; Summer forest inside and outside the alkalinehydrolysis n, available p content is positively correlated with soil temperature. Winterforest alkali-hydro nitrogen and phosphorus with soil temperature there is a negativecorrelation.Biological fire prevention forest belt has a lower air temperature, relative humidity ofair, to reduce the forest wind speed, improve the soil nutrient, promote the growth ofschima superba, and enhance the role of fire ability.