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首页> 外文期刊>Acta Horticulturae >Heat requirements for loquat fruit development may be assessed with a Beta model approach
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Heat requirements for loquat fruit development may be assessed with a Beta model approach

机译：可以通过β模型方法评估枇杷果实开发的热量要求

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摘要

In Mediterranean areas, loquat trees (Eriobotrya japonica Lindl.) typically bloom in fall and fruits develop during the winter period, reaching their ripening in spring. So far, little interest has been driven towards models capable of estimating heatrequirements for the accomplishment of fruit development in the winter period. In this work, we verified whether in Mediterranean areas the heat accumulation (GDH) needed for loquat fruit growth, may be precisely described using a Beta model, a flexiblemathematical function which, in the past, has been successfully used in peach. BBCH phenological stages of Algerie' trees were recorded in two experimental sites: Palermo, Italy (38°04'N, 13°22'E, 150 m a.s.l.}, and Callosa d'En Sarria, Alicante, Spain (38°39'N, 00°07'W, 150 m a.s.l.). The original data pool included maximum and minimum daily temperatures from a total of sixteen years, nine from Palermo and seven from Callosa. Firstly, the model was tested taking into account phenological data fromall the years. However, due to anomalous data, some years were excluded. Temperatures and phenological data - Julian days ()D) from anthesis to ripening date - were used as input to run a Visual Basic computer program for the computation of growing degree hours (GDH). The program was used to randomly change the triplet of cardinal temperatures (i.e., base (Th), optimal (T0) and critical (T,-)) used to construct the Beta model. More than a thousand random sets of cardinal temperatures were generated tooptimize the model. The target was to minimize the coefficients of variation (CV) of harvest dates (JD) among years and locations. The best resulting model, having Tb=4.8°C, T=9.0°C and TC=42.2°C, yielded an average accumulation of 67542 GDH, and CV=2.36%. On average, the model generated an error of 5 days (SE ±1) between real harvest time and forecasts. Tb and T were selected within very narrow intervals, implying a high level of estimation accuracy. Thus, in future studies further curvilinear models have to be studied in order to estimate loquat heat requirements with minimal errors. In conclusion, although further attempts must be carried out in order to refine a loquat fruit growth phenoclimatic model, the approach used in this work may represent a further step to predict loquat harvest date.
机译：在地中海地区，枇杷树（Eriobotrya japonica Lindl。）通常在秋季绽放秋季和水果在冬季发展，在春天达到成熟。到目前为止，对能够估算冬季水果开发的果实发展的模型来说，这一点令人兴趣。在这项工作中，我们验证了在地中海领域是否可以使用β模型精确描述枇杷果实生长所需的热累积（GDH），这是一种FlexiBeMateMaticationication函数，这些功能在过去已经成功地用于桃子中。阿尔及利亚树木的BBCH鉴定阶段被记录在两个实验遗迹：意大利巴勒莫（38°04'N，13°22'e，150米Asl}，和Callosa d'En Sarria，Alicante，西班牙（38°39' n，00°07'w，150米ASL）。原始数据池包括总共十六年的最大和最小日温度，来自巴勒莫的九个来自巴塞萨的七个。首先，测试了该模型考虑了来自所有的毒性数据多年来。然而，由于异常数据，部分被排除在外。从开发到成熟日期到成熟日期的温度和鉴别数据 - 朱利安天（）d）用作输入以运行Visual Basic计算机程序，以计算增加程度的数小时计算（GDH）。该程序用于随机改变基本温度的三重态（即，基础（Th），最佳（T0）和临界（T， - ）），用于构建β模型。产生了超过一千个随机的基体温度，以优化模型。目标是在多年和地点之间最小化收获日期（JD）的变异系数（CV）。具有Tb = 4.8°C，T = 9.0°C和Tc = 42.2°C的最佳产生模型，其平均累积为67542GDH，CV = 2.36％。平均而言，该模型在真实收获时间和预测之间产生了5天（SE±1）的误差。在非常窄的间隔内选择TB和T，暗示了高水平的估计精度。因此，在未来的研究中，必须研究进一步的曲线模型，以便以最小的误差估计枇杷热要求。总之，尽管必须进行进一步的尝试以便优化枇杷果实生长的比例模型，但该工作中使用的方法可以代表预测枇杷收获日期的另一个步骤。

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  • 来源
    《Acta Horticulturae》 |2018年第1229期|共8页
  • 作者

    A. Scalisi; V. Farina; C. Reig; M. Agusti; F.R Marra;

  • 作者单位

    Department of Agricultural Food and Forest Sciences University of Palermo Viale delle Scienze 11 Palermo 90128 Italy;

    Department of Agricultural Food and Forest Sciences University of Palermo Viale delle Scienze 11 Palermo 90128 Italy;

    Instituto Agroforestal Mediterraneo Universidad Politecnica de Valencia Camino de Vera sn 46022 Valencia Spain;

    Instituto Agroforestal Mediterraneo Universidad Politecnica de Valencia Camino de Vera sn 46022 Valencia Spain;

    Department of Agricultural Food and Forest Sciences University of Palermo Viale delle Scienze 11 Palermo 90128 Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 园艺;
  • 关键词

    loquat (Eriobotrya japonica Algerie'); chilling; growing degree hours (GDH); phenology; thermal time;

    机译：枇杷（Eriobotrya japonica Algerie'）;冷却;生长度小时（GDH）;候选;热时间;

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