| 北京市近20年农业用水变化趋势及其影响因素 |
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| 引用本文： | 黄晶,宋振伟,陈阜,张海林,孔箐锌.北京市近20年农业用水变化趋势及其影响因素[J].中国农业大学学报,2009,14(5). |
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| 作者姓名： | 黄晶 宋振伟 陈阜 张海林 孔箐锌 |
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| 作者单位： | 中国农业大学,农学与生物技术学院/农业部农作制度重点开放实验室,北京,100193 |
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| 基金项目： | 引进国际先进农业科学技术项目(948)(2006-G52(B)); 2008年公益性行业(农业)科研专项资助(200803028) |
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| 摘 要： | 对1986-2007年北京市农业用水情况和影响其变化的相关指标进行主成分分析。结果表明:农作物播种面积、有效灌溉面积、种植业总产量、养殖业总产量和参考作物腾发量五大指标所代表的面积、产量、气候三大因素对北京市农业用水影响的贡献率依次为44.1%、35.2%和17.1%。具体分析各因素,发现近20年北京市农业用水量的降低主要是因为农作物播种面积和有效灌溉面积缩小,节水灌溉面积扩大以及节水技术进步;种植业单位产量用水量的减少,使农业用水量降低;种、养业等用水比例变化趋向合理,有利于北京市节水型农业结构的发展;但目前北京市参考作物腾发量呈上升趋势,将加大农业灌溉用水压力。
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| 关 键 词： | 农业用水 变化趋势 主成分分析 影响因素 |
Agricultural water consumption trend and its influence factors in Beijing over the past 20 years |
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| HUANG Jing,SONG Zhen-wei,CHEN Fu,ZHANG Hai-lin,KONG Qing-xin.Agricultural water consumption trend and its influence factors in Beijing over the past 20 years[J].Journal of China Agricultural University,2009,14(5). |
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| Authors: | HUANG Jing SONG Zhen-wei CHEN Fu ZHANG Hai-lin KONG Qing-xin |
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| Institution: | HUANG Jing,SONG Zhen-wei,CHEN Fu,ZHANG Hai-lin,KONG Qing-xin(College of Agronomy , Biotechnology/ Key Laboratory of Farming System,Ministry of Agriculture,China Agricultural University,Beijing 100193,China) |
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| Abstract: | Study on the trend of agricultural water consumption and its influence factors is very important for the future work of saving water in Beijing.In this paper,the trend of the gross agricultural water consumption from 1986 to 2007 was analyzed.Influence factors were selected by using the principal component analysis.The result indicated that area,production and climate were the three major factors which influenced the changing of agricultural water consumption.The three factors covered five indicators includ... |
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| Keywords: | agricultural water consumption trend principal component analysis influence factors |
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