【摘要】 为分析呼和浩特市种植业生产系统长期发展情况,进而优化系统投入产出结构,促进其可持续发展,采用能值分析方法与选取评价指标,以1996—2016年为时间跨度,对呼和浩特市种植业生产系统进行分析与评价。结果表明:1)能值投入部分,可更新的有机能、不可更新的工业辅助能、可更新的环境资源、不可更新的环境资源的在所研究的时间跨度内(21年)平均占有比例分别为44.51%、40.19%、14.31%、0.99%。其中,可更新的有机能呈现下降趋势,而不可更新的工业辅助能呈现增长趋势,并于2009年超过可更新的有机能,成为能值投入的第一大组成部分。能值产出部分,粮食作物、粮食作物秸秆、经济作物、经济作物秸秆、蔬菜、水果21年平均占有比例分别为42.20%、27.71%、12.13%、0.37%、16.73%、0.86%。其中,经济作物呈现下降—增长趋势,并于2016年超过蔬菜,成为继粮食作物、粮食作物秸秆的能值产出第三大组成部分。2)种植业生产系统的集约化程度增高,生产效率较为稳定,但环境承载压力增大,可持续发展指数下降。建议通过有机肥替代部分氮肥等途径提升呼和浩特市种植业生产系统可持续发展水平。更多还原

【Abstract】 In order to analyze the long-term cropping system trend in Hohhot,optimize the input-output structure and improve sustainable development level,this study adopted emergy theory analysis method and selected evaluation index to assess the cropping system of Hohhot from 1996 to 2016.The evaluation results showed that:In the emergy input part,renewable organic resources,non-renewable industrial resources,renewable resources and non-renewable resources were calculated,which respectively accounted for 44.51%,40.19%,14.31% and 0.99% on average over the last 21 years.The renewable organic resources showed the ascending trend while the non-renewable industrial resources presented the growing trend.In 2009,the non-renewable industrial resources exceeded renewable organic resources and made first contribution in the emergy input part.In the emergy output part,grain crop,grain crop straw,economic crop,economic crop straw,vegetable crop and fruit were calculated,which respectively accounted for 42.20%,27.71%,12.13%,0.37%,16.73%,0.86% on average over the last 21 years.Economic crop decreased initially and then increased.In 2016,it exceeded vegetable crop and became the third largest part after grain crop and grain crop straw.In conclusion,the cropping system in Hohhot had a higher intensive degree and steady production efficiency.However,it faced greater environmental pressures and lower sustainable ratios.Therefore,using manure replacing partial nitrogenous fertilizer to improve the sustainable level of Hohhot cropping system was suggest in this study.更多还原