摘要
在分析乔木水土保持林防护机理的基础上 ,通过对渭北黄土高原剌槐水土保持林调查、分析 ,确定该区剌槐水土保持林在常规密度下的初始防护成熟龄为 11～ 16年 (平均为 12年 ) ;最大防护成熟龄为 2 5年 ;更新龄为 4 2年 ;防护成熟期 (更新龄与初始防护成熟龄之差 )为2 6～ 31年。以防护成熟龄为基础 ,确定剌槐水土保持林的三个经营阶段 :成熟前期、防护成熟期和更新期。这些结果将为水土保持林的合理经营提供参考。
On the basis of the discussion on protective maturity of water and soil conservation forest (WSCF),investigations on Robinia pseudoacacia WSCF in Weibei Loess Plateau were made.The investigation items included stem diameter,tree height,crown,structure,stem analysis,soil,site condition and so on.Total 80 sample plots were obtained.Based on the investigation data,initial protective maturity age (IPMA),maximum age of protective maturity (PMAmax),regeneration age (RA) and protective maturity period (PMP) of R.pseudoacacia WSCF were determined.In the case of normal density (initial stem density =2 m×2 m,the preserved rate =80% ) of Robina pseudoacacia WSCF,the results were as follows: IPMA=11～16 years,PMA max=25 years,RA =42 years and PMP=26～31 years.Three phases for management of WSCF were divided according to protective maturity ages.These results may provide some references in management of R.pseudoacacia WSCF.
出处
《生态学杂志》
CAS
CSCD
北大核心
2004年第5期1-6,共6页
Chinese Journal of Ecology
基金
中国科学院知识创新工程重要方向资助项目 (KZCX3 -SW -4 18)
关键词
剌槐
水土保持林
防护成熟
更新
经营
Robinia pseudoacacia,water and soil conversation forest,protective maturity,regeneration,management.
