...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Science of the Total Environment >'More crop per drop': Exploring India's cereal water use since 2005
【24h】

'More crop per drop': Exploring India's cereal water use since 2005

机译：“每滴更多作物”：自2005年以来探索印度的谷物用水

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

India has the highest national freshwater demand globally and 91% of India's freshwater is used in the agriculture sector. Cereals account for over 50% of the dietary water footprint in India and represent a potential opportunity for reducing water use in Indian agriculture.This study combines governmental production and irrigation statistics with crop distribution maps to examine trends in annual water use for cereal production in India between 2005 and 2014. A new online water assessment tool, Cool Farm Tool Water (CFTW), was used to calculate water use and derive seasonal state-level blue and green water footprints for rice, wheat, sorghum, millet and maize.The analysis indicates that India achieved 26.4% increased total cereal production between 2005 and 2014 without additional water or land use. Cereal water footprints have declined due to higher yields for most crops and slightly lower rates of evapotranspiration. There has also been a shift in the area under production away from the Kharif (monsoon) towards the Rabi (dry) season in which total water footprints for all cereals except rice are substantially lower (-33.4% to -45.0% compared to Kharif), but show a significantly higher dependency on ground and surface water.The value of this study is two-fold. First, it provides a full assessment of production trends for the five major cereals in India for each year from 2005 to 2014 and links it to water use. Secondly, it uses updated seasonal water footprints, which demonstrate the potential for changes in cereal production practices to contribute to improved efficiency of water use in India. Future pressures on scarce water resources may encourage transition to cereals with lower irrigation dependency, in particular maize, but also sorghum and millet. In addition, increased emphasis on improving millet and sorghum yields would be of benefit to secure cereal production and reduce its overall water footprint. (C) 2019 The Authors. Published by Elsevier B.V.
机译：印度全球最高的国家淡水需求，91％的印度淡水用于农业部门。谷物占印度饮食水占地面积的50％以上，代表了减少印度农业用水的潜在机会。本研究将政府生产和灌溉统计与作物分销图结合起来，审查印度谷物生产年度用水趋势在2005年至2014年期间。一项新的在线水评估工具，酷农场工具水（CFTW）用于计算水使用和季节性状态级蓝色和绿色水脚印，用于米饭，小麦，高粱，小米和玉米。分析表明，印度在2005年至2014年之间取得了26.4％，没有额外的水或土地使用。由于大多数作物的产量越高，谷物水占地面积有所下降，蒸散率略低较低。在生产中，远离Kharif（季风）朝向拉比（干）季节的地区的转变，其中除了大米外的所有谷物的总水占地面积显着较低（与Kharif相比，除去-45.0％ - 45.0％） ，但显示了对地面和地表水的显着较高依赖性。本研究的价值是两倍。首先，从2005年到2014年，它为印度五大谷物的生产趋势提供了完全评估，并将其与水使用相连。其次，它使用更新的季节性水脚印，这证明了谷物生产实践变化的可能性，以提高印度的用水效率。对稀缺水资源的未来压力可能会鼓励灌溉依赖，特别是玉米，也是高粱和小米的谷物过渡到谷物。此外，增加重点是改善小米和高粱产量有益，可以有利于保护谷物生产并减少其整体水占地面积。 （c）2019年作者。由elsevier b.v出版。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号