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黄土高原中南部农果复合型生态农业生产力特征

吴发启1;周正立2;刘海斌1   

  1. 1西北农林科技大学资源环境学院,杨凌 712100;2塔里木农垦大学植物科技学院,阿拉尔 843300

  • 收稿日期:2004-01-12 修回日期:2004-05-02 出版日期:2005-02-18

Productivity of crop-fruit ecological agriculture in middle-south Loess Plateau

WU Faqi1,ZHOU Zhengli2,LIU Haibin1   

  1. 1College of Resources and Environmental Science,Northwest Sci-Tech University of Agriculture and Forestry,Yangling 712100,China;2College of Plant Science and Technology,Tarim University of Agriculture and Reclamation,Alar 843300,China

  • Received:2004-01-12 Revised:2004-05-02 Online:2005-02-18

摘要: 以黄土高原中南部的西坡、飞马河和南沟3村为对象,研究了农果复合型生态农业的生产力特征.结果表明,(1)同一植物各器官的生产力果实最大,茎叶次之,根最小;(2)农果复合型生态农业中,农业子系统越发达,系统生物生产力越高,经济生产力越小,经济产值越低;果业子系统越发达,系统生物生产力越小,经济生产力越高,经济产值越高;(3)畜牧业子系统生产力均处于相对较低的水平,制约了系统总生产力的提高.

关键词: 沉水植物, 营养物质循环, 重建

Abstract: With the Xipo,Feimahe and Nangou villages as test objects,the productive characteristics of crop-fruit ecological agriculture in the middle-south Loess Plateau were investigated.The results showed that the biomass productivity of a plant was different with its organs,the highest for grain or fruit,and followed by stem,leaf and root.In the crop-fruit ecological agriculture,the higher ratio the crop subsystem,the higher productivity its biomass,the lower economic productivity and lower economic value was; while the fruit subsystem was on the contrary.The productivity of livestock farming subsystem was in a lower level,which restricted the increase of the total ecosystem's productivity.Based on these results,a countermeasure of increasing the ecosystem productivity was put forward.

Key words: Submerged macrophytes, Cycle of nutrients, Rehabilitation