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Analysis and assessment for industrial structure and function variation of the agroecosystem in the Hilly and Gully Region of Loess Plateau
Authors
梁银丽
王巨媛
翟胜
Publication date
1 January 2005
Publisher
Abstract
以延安市宝塔区河庄坪镇为研究对象,对农业生态系统生产力、产业结构及效益进行了动态分析,结果表明:1996~2003年,该镇农业生态系统产品生产力、经济生产力均有不同程度的提高,人均产菜增长了近4.46倍,粮食与蔬菜单位面积产值分别增加了近2.7倍与1.09倍,人均纯收入增长了45.7%,达1 820.9元;种植业纯收入及其组分优势度呈升高趋势,而种植业效益却呈降低趋势;养殖业基础比较薄弱、效益低下,虽目前表现入不敷出,但因其日益受到重视,将逐渐成为继种植业后的第二大经济收入来源;果业纯收入与其组分优势度稳中有降,而果业效益在逐年提高;工副业纯收入、组分优势度及效益均呈下降趋势,并在2002年出现波谷。就农业生态系统整体而言,系统总体优势度呈上升趋势,系统稳定性指数在波动中下降,表明系统结构趋于不合理,稳定性较差,需加大对农业产业结构的调整力度
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018