天水杏子水分适宜性的研究

目的]研究天水杏子水分适宜性。方法]运用甘肃省天水农业气象试验站1998～2003年杏子物候观测资料和毗邻麦积国家基本气象站1971～2009年的气象资料,采用Penman-Monteith公式及作物系数,对杏子各生育阶段的需水量进行估算,建立估算水分利用程度的水分适宜度及满足度模型。结果]天水市杏子生长期的水分条件比较优越,年平均水分适宜度和满足度分别为0.53、0.68。全生育期杏子水分适宜度随时间呈下降状态,水分胁迫增大;旺盛生长期水分适宜性最差,其次为初始生长期,后期生长期水分适宜度较好。结论]利用该模型可对天水市杏子的水分适宜性进行评价,从而为当地的杏子种植区划及科学灌溉提供指导。

A Studying on Water Suitability of Apricot in Tianshui

Objective]The research aimed to study water suitability of apricot in Tianshui.Method]Based on data of apricot's phonological observation at Tianshui agrometeorological experiment station from 1998 to 2003 and meteorological data in Maiji National Base Meteorological station from 1971 to 2009,the water requirement of apricot in each growth periods had been calculated with the Penman-Monteith formula and crop coefficient,and the model of water suitability and water sufficient rate degree for apricot had been set up.Result]The water supply to apricot was under good conditions in Tianshui which annual mean water suitability and water sufficient rate degree are 0.53 and 0.68 respectively.The water suitability degree of whole growth periods decreased with the times which indicated that the water stress for apricot increased with the times.The water suitability of apricot was at better condition in growth stage after mature periods,good in initial growth stage,worse in vigorous growth stage.Conclusion]We can assess the water suitability of apricot with the model and provide guide for planting district and scientific irrigation of apricot in Tianshui.