摘要
以“九五”攻关课题“嫩江沙地治理技术与示范”在泰来县建设的治理开发区工程为基点 ,对示范工程建设前后及建设区内、外的生态因子进行对比观测调查 ,利用主成分分析、关联分析、主分量分析等方法将收集到的生态因子进行筛选 ,提出嫩江沙地风蚀荒漠化生态环境变化的主要生态因子指标 ;以土地生产力为应变量 ,以生态环境因子变化引起土地生产力变化的主导生态因子为自变量 ,进行逐步回归分析 ,建立环境质量变化的评价指标体系和定量化评价公式。经计算半固定沙丘治理开发及庄园式沙地治理开发的评价值分别为 2 .0 2 32和 2 .32 4 5 ,均大于优化值 1.5。
In this paper were screened ecological factors collected by means of main composition,incident and component analyses,and presented main ecological indications of ecological environment changes of desertification caused by wind erosion in Nenjiang sandy land.Environment quality assessment indication system and quantitative formula were established by stepwise variance analysis,with land productivity as development valiable and with the leading ecological factors of land productivity changes as independent.Assessment values of control and developing of unstable dunes and sandy lands are 2.023 and 2.324 5,respectively,that are 1.5 more than the optimum.
出处
《防护林科技》
2001年第4期1-5,共5页
Protection Forest Science and Technology
基金
国家"九五"攻关专题 ( 1996- 0 17- 0 3 - 0 2 )
