计划烧除对针阔混交林地土壤化学性质的影响  

The Effect of Prescribed Burning on the Chemical Property of Mixed Coniferous and Broad-Leaved Forest Soil

作　　者：张立存[1,2] 孙科辉[2] 钟安建 焦鸿渤 肖金香[2] 

机构地区：[1]江西省水土保持科学研究院,江西南昌330029 [2]江西农业大学林学院,江西南昌330045 [3]九江市庐山区林业局,江西九江332000 [4]江西新余市渝水区林业局,江西新余338000

出　　处：《江西农业大学学报》2014年第3期587-593,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：江西省科技厅项目(20122BBG70164)

摘　　要：在梅岭国家森林公园外围选取3块针阔混交林标准样地,按时间间隔每两个月进行一次计划烧除,每次燃烧实验共设置10,30,60 min和CK(对照)4个处理,最后一次燃烧实验结束后统一进行土样采集和室内试验分析。结果表明:火烧后土壤pH值持续升高,升高程度与火烧持续时间成正比。火烧持续时间为10 min,土壤有机质含量和土壤全氮含量均随着时间的推移呈持续增加趋势,而火烧持续时间为30 min和60 min呈先增后降。土壤有效氮的含量呈先增后降趋势,但各个阶段的含量均高于烧前水平。用火之后,不同火烧持续时间土壤有效磷的含量变化趋势不同,火烧持续时间为10 min呈持续递增趋势,火烧持续时间为30 min和60 min呈先降后增趋势,且火烧持续时间为30 min恢复较快。火烧持续时间为10 min迹地上的土壤速效钾含量呈递增趋势,而火烧持续时间为30 min和60 min迹地上呈先增后减趋势。在燃烧60 min之内,低强度计划烧除,有利于土壤养分的改善。This study selected three standard sample plots in the mixed coniferous and broad leaved forest outside the Meiling National Forest Park .Prescribed burning was conducted for them every two months and each burning test lasted 10 min,30 min and 60 min.Soil sample collection and laboratory analysis were carried out after the final burning test .The results displayed that the pH value of the soil increased constantly after burning whose upward trend was in proportion to the burning duration .The soil organic content and total N con-tent were in an upward trend over time after 10 min’ s burning,but their values were in an upward trend fol-lowed by a downward trend when the burning duration were 30 min and 60 min.In addition,the soil available N content increased first and then decreased but its values were higher than those before burning under these three measures .The changing trends of the soil available P content varied different in response to the three burning durations .The 10 min’ s burning made the value increased gradually while the value was found to be in a downward trend followed by an upward trend after the burning lasting 30 min and 60 min and the value re-turned to its original level soon after the 30 min’s burning compared with that after 60 min’s burning.Besides, the rapid available K content in the soil was observed to be in an increasing trend resulted from the burning effect of 10 min while an upward trend at first and then a downward trend were noticed after the burning of 30 min and 60 min.It is advisable to conduct prescribed burning with low intensity within 60 min to improve soil nutrients .

关 键 词：计划烧除 针阔混交林 土壤化学性质 

分 类 号：S714[农业科学—林学]