Effect of Slash Burning on Nutrient Removal and Soil Fertility in Chinese Fir and Evergreen Broadleaved Forests of Mid—Subtropical China

编号 zgly0000304234

文献类型 期刊论文

文献题名 Effect of Slash Burning on Nutrient Removal and Soil Fertility in Chinese Fir and Evergreen Broadleaved Forests of Mid—Subtropical China

学科分类 220.99;林学其他学科

作者 YANGYusheng  GUOJIANFEN 

作者单位 FujianAgricultureandForestryUniversity 

母体文献 PEDOSPHERE;土壤圈: 英文版 

年卷期 2003,13(1)

页码 87-96

年份 2003 

分类号 S791.27 

关键词 杉木  土壤肥力  常绿阔叶林  营养物质  亚热带地区  中国 

文摘内容 A Chinese fir forest(Cunninghamia lanceolata,CF) and an evergreen broadleaved forest(EB) located in Fujian Province,southeastern China,were examined following slash burning to compare nutrient capital and topsoil properties with pre-burn levels.After fire,nutrient(N,P and K) removal from burining rsidues was estimated at 302.5kg ha^-1 in the CF and 644.8kg ha^-1 in the EB.Fire reduced the topsoil capitals of total N and P by about 20% and 10%,respectively,in both forests,while K capital was incresed in the topsoils of both forests following fire.Total site nutrient loss through surface erosion was 28.4kg(N) ha^-1 ,84.kg(P)ha^-1 and 328.7kg(K) ha^-1 in the CF.In the EB,the losses of total N,P and K were 58.5,10.5 and 396.3kg ha^-1,respectively,Improvement of soil structure and increase in mineralization of nutrients associated with increasesd microbe number and enzyme acitvityes and elecvated soil respiration occurred 5 day after fire.Howerver,organic matter and available nutrient contents and most of other soil parameters declined ont year after fire on the burned CF and EB topsoils.These rsults suggest that short-tmerm site productivity can be stimulated immediately.but reduced subsequently by soil and water losses,especially in south China,where high-intensity precipitation,steep slopes and fragile soil can be expected,Therefore,the silvicultural measurements should be developed in plantation management。