...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Agricultural Water Management >Water productivity of irrigated maize production systems in Northern China: A meta-analysis
【24h】

Water productivity of irrigated maize production systems in Northern China: A meta-analysis

机译：灌溉玉米生产系统在中国灌溉玉米生产系统：荟萃分析

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

Understanding water productivity (WP) on a regional scale is useful for identifying and managing inefficiencies in irrigated crop production systems. However, relevant WP analyses are not available for maize production systems in China. A meta-analysis was conducted of maize WP in Northern China that included 2354 observations from 282 articles published between January 2000 and March 2018. Our goal was to quantify the current WP and its constraining factors, and estimate the boundary function for WP in the different maize agro-ecological zones of Northern China. The Northern China average WP across the large set of field experiments was 22.3 kg ha(-1)mm(-1), with Northeast China (NE, 25.8 kg ha(-1)mm(-1)) > North China Plain (NCP, 22.3 kg ha (-1)mm(-1)) Northwest China (NW, 21.6 kg ha(-1)mm(-1)). The boundary function for WP had slopes of 42.5, 36.8 and 40.4 kg ha(-1)mm(-1) for NW, NCP and NE, respectively. The WP was significantly correlated with latitude, vapor pressure deficit, N application rate, seasonal average temperature, experimental regions and years. WP was increased by optimal irrigation, soil surface with plastic mulch, deep tillage, straw incorporation into the soil, ridge planting, and the application of super absorbent polymer. In this study, we provided both reference WP values, recommendations to achieve higher WP and identification of regions with opportunities for improvement.
机译：了解区域规模的水生产率（WP）可用于识别和管理灌溉作物生产系统的低效率。但是，在中国的玉米生产系统不可用相关的WP分析。中国北部玉米WP进行了荟萃分析，其中包括2000年1月至2018年1月至2018年3月在282篇文章中的2354篇观察。我们的目标是量化当前的WP及其约束因素，并估计不同的WP边界函数北方玉米农业生态区。中国北方平均WP在大型现场实验中为22.3公斤HA（-1）mm（-1），东北地区（NE，25.8千克（-1）mm（-1））>华北平原（ NCP，22.3千克HA（-1）mm（-1））西北地区（NW，21.6千克（-1）mm（-1））。 WP的边界功能分别具有42.5,36.8和40.4kg HA（-1）mm（-1）的斜率，分别用于NW，NCP和NE。 WP与纬度，蒸汽压力缺陷，N施用率，季节性平均气温，实验区和年度显着相关。 WP通过最佳灌溉，土壤面积与塑料覆盖，深耕，秸秆掺入到土壤，岭种植和超强吸水性聚合物中的应用。在这项研究中，我们提供了参考WP值，建议实现更高的WP和识别区域的地区的改进机会。

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