摘要
【目的】为定量综合评价环渤海潮土区棉花施用控释氮肥的效益,建立了包括社会、经济和生态环境3个方面共9项指标的多因素二级评价指标体系。【方法】本研究采用模糊评价的方法,定量评价了棉花施用氮肥的5个处理[不施肥对照处理CK;常规氮肥尿素(F);等量控释氮肥(CF1); 80%控释氮肥(CF2); 60%控释氮肥(CF3)]的社会效益、经济效益、生态环境效益以及综合效益,以期为该地区的棉花生产建立生态环境友好型的农业生产模式提供理论支持。【结果】只考虑社会效益时,施等量控释氮肥(CF1)最高;仅考虑经济效益时,5个不同处理的经济效益从高到低的顺序为:常规氮肥尿素(F)> 80%控释氮肥(CF2)>等量控释氮肥(CF1)> 60%控释氮肥(CF3)>不施氮肥对照处理CK;只考虑生态环境效益时,80%控释氮肥(CF2)生态效益最高;将社会效益、经济效益、生态环境效益三因素综合考虑时,综合效益最高的是80%控释氮肥(CF2)。【结论】该地区施用控释氮肥推荐用量为等养分常规尿素的80%。
【Objective】In order to quantitatively evaluate the benefits of controlled-release nitrogen fertilizer( CRNF) of cotton in the fluvoaquic soil of Bohai sea,the multi-factor secondary evaluation index system was established,which included 9 indexes from 3 aspects of society,economy and ecological environment. 【Method】The fuzzy comprehensive evaluation method was applied,and the society,economy and ecological environment benefits of CRNF of cotton were quantitatively evaluated,including five treatments[i. e.,the control treatment without fertilization( CK),conventional nitrogen fertilizer urea( F),equal amounts of CRNF( CF1),CRNF of 80 %( CF2),CRNF of 80 %( CF3) ],which would provide a theoretical support for constructing the eco-friendly agriculture production model of cotton in this region.【Result】When only the social benefit was considered,the maximum value under CF1 treatment was observed; When only the economic benefit was considered,the economic benefit order of the five treatments was that:( F) >( CF2) >( CF1) >( CF3) >( CK); When only the ecological environmental benefit was considered,the maximum value under( CF2) treatment was observed; When the society,economy and ecological environment benefits were comprehensively considered,the maximum value was observed under( CF2) treatment. 【conclusion】Thus,CF2 was the proposed dosage of CRNF for this region.
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