杉木人工林采伐后水源涵养和固土保肥效益损失的评价  

EVALUATION OF LOSING BENEFITS TO WATER RESOURCE CONTAINMENT, SOIL-FIXATION AND FERTILITY PRESERVATION AFTER CUTTING CHINESE FIR PLANTATION

作　　者：康文星[1] 田大伦[1] 

机构地区：[1]中南林学院,株洲412006

出　　处：《林业科学》2002年第1期111-115,共5页Scientia Silvae Sinicae

基　　金：林业部"八五"重点项目<湖南省会同杉木人工林生态系统定位研究>的内容之一

摘　　要：本文以连续定位测定数据 ,对湖南会同杉木人工林采伐后造成各种效益损失 ,用等效益相关代替法进行了详细分析。结果表明 :杉木人工林采伐后 ,土壤蓄水量比有林区少 6 4 6m3·hm- 2 ,调洪能力少 786m3·hm- 2 ,枯水期提供水量少 318m3·hm- 2 ,每年流失的泥沙量比有林区多 4 8t·hm- 2 ,由此比有林区多流失的营养物质 ,纯N 0 0 87t·hm- 2 ,P 0 0 4 7t·hm- 2 ,K 0 10 1t·hm- 2 。通过有关计量计算得出 ,每采伐 1hm2 杉木林每年水源涵养效益损失 84 9元 ,固土保肥效益损失 5 0 4元 ,改良土壤效益损失 10 2元 ,共计损失 14 5 5元。Based on the data observed continuously in fixed positions, various benefit losses resulted from cutting the Chinese fir plantation were analized by isobenefit correlation substitution method. The Chinese fir plantation was located in Huitong County, Hunan Province. The results showed that compared with forest area, the amoun t of water storage in cutover area decreased 646 m 3·hm -2 . The capacity of regulating flood in cutover area was 786 m 3·hm -2 less than that in forest area. The amount of water supply during water exhaustion in cutover area was 318m 3·hm -2 less than that in forest area. The amount of mud and sand losed every year in cutover area was 48t·hm -2 more than that in forest area, which resulted in more nutrient substance losed from the cutover area each year, e.g. N?0.087 t·hm -2 , P?0.047t·hm 2, K?0.101 t·hm -2 . According to the relative calculation the annual benefit loss of water resource containment would be 849 yuan if one hectare of cut Chinese fir plantation which was cut, that of soil fixation and fertility would be 504 yuan, that of soil improvement 102 yuan, totally 1455 yuan. The reliable scientific basis was provided for rational utilization of forest resources and the evaluation of loss after cutting forest.

关 键 词：杉木人工林 采伐 效益损失 评价 水源涵养效益 固土保肥效益 土壤改良效益 等效益相关替代法 

分 类 号：S791.27[农业科学—林木遗传育种]