冀西北高原植被生产力与退耕对策  

Actual productivities of different vegetations in northwest plateau of Hebei Province and strategies of converting farmland to forest and pasture land.

作　　者：刘玉华[1] 张立峰[1] 

机构地区：[1]河北农业大学,保定071001

出　　处：《应用生态学报》2004年第11期2113-2116,共4页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目 (G2 0 0 0 0 1860 6);国家防沙治沙资助项目 (FS2 0 0 0 0 3 )

摘　　要：依据冀西北高原的气候与土壤条件 ,进行了区域内不同类型农田农林草现实生产力状况的比较研究 .结果表明 ,就不同植被而言 ,不论是草甸栗钙土还是砂质栗钙土 ,农田和草地与林地相比具有明显的生物产量优势 ,而农田和人工草地之间的生物产量差异相对较小 .就不同农田类型而言 ,草甸栗钙土植被生产力明显高于砂质栗钙土 .在明确不同植被现实生产力间差异的基础上 ,提出了要首先实施砂质栗钙土农田的退耕 ,退耕地只能还草 ,不能还林 。Basing on the climate and soil conditions in northwest plateau of Hebei Province,this study compared the actual productivities of different vegetation types.The results showed that the productivity of crop and grass was much higher than that of forest either on meadow chestnut soil or on sand chestnut soil,and the difference of productivities between crop and grass was small.As for different soil types,the productivity of grassland chestnut soil was higher than that of sand chestnut soil.According to the differences of productivities between crop,forest and grass,most farmland should be converted to grassland but not forest land.After farmland converted,the production structure should be adjusted in considering both the protection of ecological environment and the development of local economy.

关 键 词：冀西北高原 植被 现实生产力 退耕 对策 

分 类 号：Q948.11[生物学—植物学]