• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental agriculture >Using ceres-wheat model to simulate grain yield production function for Faisalabad, Pakistan, conditions.
【24h】

Using ceres-wheat model to simulate grain yield production function for Faisalabad, Pakistan, conditions.

机译：使用ceres-wheat模型来模拟巴基斯坦费萨拉巴德条件下的谷物产量生产函数。

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

Using computer simulation model as a management tool requires model calibration and validation against field data. A three-year (2008-2009 to 2010-2011) field study was conducted at the Postgraduate Agricultural Research Station of the University of Agriculture, Faisalabad, Pakistan, to simulate wheat grain yield production as a function of urea fertilizer applications using Crop Environment REsource Synthesis (CERES)-Wheat model. The model was calibrated using yield data for treatment of urea fertilizer application at the rate of 247 kg-urea ha-1 during growing season 2009-2010 and was validated against independent data sets of yield of two years (2008-2009 and 2010-2011) for a wide variety of treatments ranging from no urea application to 247 kg-urea ha-1 application. The model simulations were found to be acceptable for calibration as well as validation period, as the model evaluation indicators showed a mean difference of 8.9%, ranging from 0.05 to 15.38%, root mean square error of 356 having its range from 242 to 471 kg ha-1, against all observed grain yield data. The scenario simulations showed maximum grain yield of 4100 kg ha-1 for 350 kg-urea ha-1 in 2008-2009; 4600 kg ha-1 for 300 kg-urea ha-1 in 2009-2010 and 5200 kg ha-1 for 340 kg-urea ha-1 in 2010-2011. Any further increase in urea application resulted in decline of grain yield function. These results show that model has the ability to simulate effects of urea fertilizer applications on wheat yield; however, the simulated maximum grain yield data need field-based verification.
机译：使用计算机仿真模型作为管理工具需要模型校准和针对现场数据的验证。在巴基斯坦费萨拉巴德农业大学研究生农业研究站进行了为期三年（2008-2009至2010-2011）的田间研究，以使用作物环境资源模拟小麦籽粒产量与尿素肥料施用量的函数关系综合（CERES）-小麦模型。该模型使用2009-2010年生长季节以247千克尿素ha -1 的比例处理尿素肥料的产量数据进行了校准，并针对两年的独立产量数据进行了验证（ （2008-2009年和2010-2011年），适用范围很广，从不使用尿素到使用247公斤尿素ha -1 。发现模型仿真可用于校准和验证期，因为模型评估指标的平均差异为8.9％，范围为0.05至15.38％，均方根误差为356，范围为242至471 kg ha -1 ，相对于所有观察到的谷物产量数据。情景模拟显示，2008-2009年，350 kg尿素ha -1 的最大谷物产量为4100 kg ha -1 ; 2009-2010年为300千克尿素ha -1 为4600千克ha -1 和340千克尿素ha为5200千克ha -1 -1 在2010-2011年。尿素施用量的任何进一步增加都会导致谷物产量下降。这些结果表明该模型具有模拟尿素施肥对小麦产量的影响的能力。然而，模拟的最大谷物产量数据需要基于现场的验证。

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