火干扰对北碚茅庵林场天然更新幼苗发生及存活的影响  

The Effect of Fire Disturbance on Natural Regeneration of Plant Seedlings in Maoan Forestry Farm of Beibei

作　　者：梁瑞云[1,2,3] 黄茹[4] 李旭光[1,2,3] 金则新[5] 陶建平[1,2,3] 

机构地区：[1]三峡库区生态环境教育部重点实验室,重庆400715 [2]重庆市三峡库区植物生态与资源重点实验室,重庆400715 [3]西南大学生命科学学院,重庆400715 [4]西南大学资源环境学院,重庆400715 [5]台州学院生态研究所,浙江临海317000

出　　处：《西南大学学报（自然科学版）》2013年第8期6-12,共7页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市科委自然科学基金资助项目(CSTC;2010BB1011)

摘　　要：从种群生态学和干扰生态学的角度,对重庆北碚区茅庵林场火烧迹地针阔混交林进行群落调查,研究火烧干扰后植物幼苗的发生及存活,结果显示:火烧干扰后,幼苗的种密度、个体密度、聚集性分布程度均随着火烧干扰强度的增强而降低,火干扰较弱区域的幼苗的种密度和个体密度显著高于未火烧区域,火干扰较强的区域则低于未受火烧的林地.认为,较弱的火干扰对幼苗发生及存活有一定促进作用,可使幼苗的生长状况优于无火烧干扰区域,高强度火干扰对幼苗生长有负影响.A community survey was conducted in the burned area of a coniferous broad-leaved mixed forest in Chongqing Maoan Forestry Farm from the perspective of genecology and disturbance ecology to study the emergence and survival of plant seedlings after fire disturbance.The results showed that the species density,individual density and aggregate distribution degree of plant seedlings decreased with increasing fire disturbance and that the species density and individual density of seedlings were higher in areas with weak fire disturbance than in unburned areas and were lower in areas with strong fire disturbance than in unburned areas.It is thus concluded that weak fire disturbance plays a positive role in the occurrence and survival of plant seedlings,which makes the seedling growth conditions better than those in unburned fire disturbance areas,but strong fire disturbance has a negative influence on seedling growth.

关 键 词：火干扰 乔木 幼苗 天然更新 

分 类 号：S718.45[农业科学—林学]