Comparison of Classical Models for Evaluating the Heat Requirements of Olive(Olea europeae L.) in Portugal

作     者：Helena Ribeiro Mário Cunha Ilda Abreu 

作者机构：Autonomous Section of Agricultural Sciences Faculty of SciencesUniversity of Porto4485-661 VairaoPortugal Department of BotanyFaculty of SciencesUniversity of Porto1191-4150 PortoPortugal Institute of Agricultural Sciences and Technology4485-661 VairaoPortugal Department of Botany Faculty of SciencesUniversity of Porto1191-4150 PortoPortugal Institute for Molecular and Cell Biology823-4150 PortoPortugal 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2006年第48卷第6期

页      面：664-671页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：supported by the National Natural Science Foundation of China(30424813) Science Publication Foundation of the Chinese Academy of Sciences 

主　　题：flowering season heat requirements olives pollen Portugal 

摘      要：The aim of the present study was to compare the accuracy and reproducibility of six statistical models for the calculation of olive （Olea europeae L.） heat requirements to trigger the onset of flowering in three Portuguese regions： Reguengos de Monsaraz, Valenga do Douro, and Braga. Other alms were to ascertain the date on which the heat-accumulation period started and the threshold temperatures above which the development of reproductive structures starts in olives. The starting and peak dates for the regional O. europeae flowering season were estimated by monitoring airborne pollen from 1998 to 2004 using ＂Cour＂- type samplers. The threshold temperature values calculated for the three regions were very similar （9.0 ℃ for Valenca do Douro, 9.2 ℃ for Reguengos de Monsaraz, and 9.7 ℃ for Braga）. The accumulated daily mean temperature model had less interannual and inter-regional variation, showing best predictive results for 2004, with absolute differences between the observed and predicted dates of 4 d in Reguengos de Monsaraz and 2 d In Valenca do Douro and Braga for the onset of flowering date and of 2 d In Reguengos de Monsaraz, 7 d in Valenca do Douro, and 4 d in Braga for peak flowering dates. This model was the most accurate, reproducible, and operational to calculate heat requirements for olives to flower, with an average mean temperature accumulation of 1 446 ℃ In Reguengos, 1 642 ℃ in Valenga do Douro, and 1 703℃ In Braga to reach the onset of flowering. The best initial date for this accumulation was 1 January.