首页> 外文期刊>Agricultural Systems >CROPGRO-Perennial Forage model parameterization for simulating Piata palisade grass growth in monoculture and in a silvopastoral system
【24h】

CROPGRO-Perennial Forage model parameterization for simulating Piata palisade grass growth in monoculture and in a silvopastoral system

机译:裁剪多年生牧草模型参数化,用于模拟单一栽培和硅质系统中的PAIATA Palisade草生长

获取原文
获取原文并翻译 | 示例
获取外文期刊封面目录资料

摘要

Silvopastoral systems are important to intensify pasture production and mitigate climate change effects. However, very few studies have been performed to adapt crop models to simulate these systems. The aim of this study was to parameterize the CROPGRO-Perennial Forage model for estimating Piata palisade grass growth in monoculture and in a silvopastoral system with eucalyptus. To generate the dataset required for that, two field experiments were carried out. The first experiment was conducted between February 2011 and July 2012 with Piata palisade grass under irrigated and rainfed conditions and cut-and-carry management. The second experiment was conducted from December 2014 to January 2016, in a single pasture of Piata palisade grass and in a silvopastoral system with the same forage species and eucalypt trees. The trees were arranged in single rows, in East-West orientation, with 15m between rows and 2m between trees in the rows. This experiment was conducted under grazing management and rainfed conditions, during 11 growth cycles, with the pasture variables being assessed at four distances from the North row of eucalypt (0.00 m, 3.75 m, 7.50m and 11.25 m), in the silvopastoral system, and in the single pasture. CROPGRO testing for the silvopastoral system considered only the competition for solar radiation since the model does not allow simulating belowground competition. For this, measured data of incoming solar radiation at each position were used as input for the simulations. The model was able to simulate forage live mass in the single pastures (R-2 from 0.72 to up to 0.89, Agreement index from 0.88 to up to 0.95, and Nash-Sutcliffe efficiency between 0.65 and 0.85), and in the silvopastoral system (R-2 from 0.76 to up to 0.89, Agreement index between 0.93 and 0.96, and Nash-Sutcliffe efficiency between 0.71 and 0.86). Despite these results, improvements should be performed in the model for simulating the effect of flowering on pasture growth, changes on pasture canopy caused by animals trampling, and competition for resources in silvopastoral systems.
机译:SilvoPASTORAL系统对于加强牧场生产和减轻气候变化效应非常重要。但是,已经进行了很少的研究以调整作物模型以模拟这些系统。本研究的目的是参数化Cropro-verennial牧草模型,用于估算单一栽培和桉树的硅晶体系统中的PiAta Palisade草生长。为了生成所需的数据集,进行了两个现场实验。第一次实验是在2011年2月和2012年7月与PAIATA PALISADE GRASS在灌溉和雨季条件下进行的,并削减和携带管理。第二次实验是从2014年12月到2016年1月,在Piata Palisade草的一个牧场和硅藻土中,具有相同的饲料物种和桉树。树木以单行排列在东西方向,在行之间的行和2米之间有15米。该实验在放牧管理和雨量条件下进行,在11次增长期间,牧场变量在北桉树北部的四个距离(0.00 m,3.75米,7.5米和11.25米),在单一的牧场。 SilvoPASTORAL系统的作品测试仅考虑了太阳辐射的竞争,因为该模型不允许模拟地下竞争。为此,每个位置处的传入太阳辐射的测量数据被用作模拟的输入。该模型能够在单个牧场(R-2从0.72到0.89,协议指数从0.88至高达0.95的协议指标进行模拟,从0.65和0.85之间的NASH-Sutcliffe效率和硅峰系统( R-2从0.76到高达0.89,协议指数在0.93和0.96之间,NASH-SUTCLIFFE效率在0.71和0.86之间)。尽管这些结果,应在模拟开花对牧场生长的效果的模型中进行改进,动物践踏牧草冠层的变化,以及硅质系统中的资源竞争。

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