高温对安徽省水稻汕优63结实率、千粒重的影响分析

摘要：本文利用安徽省农科院2000-2004年中稻分期播种试验水稻发育期资料、产量结构资料和相应的气象地面观测资料为基本数据源，分析了水稻汕优63不同生育阶段内高温日数、危害积温、高温日平均最高气温和高温日平均最低气温对结实率、千粒重的影响。结果表明，不同生育期内高温日数、危害积温对结实率、千粒重的影响为孕穗期>幼穗形成期>抽穗灌浆期；孕穗期内高温日平均最高气温对结实率、千粒重影响显著，幼穗形成期、抽穗灌浆期内高温日平均最高气温对结实率、千粒重的影响相对较小；高温日平均最低气温对结实率、千粒重的影响在抽穗灌浆期最为显著，孕穗期次之，幼穗形成期最小。

The Response of Seed Setting Rate and 1000-grain Weight of Shan You 63 by High-temperature in AnHui Province

The influence of high-temperature elements 63 in different growth stages were analyzed by linear on seed setting rate and 1000-grain weight of ShanYou regression in this article, including high-temperature days, against the accumulated temperature, average daily maximum temperature and average daily minimum temperature. The results showed that the growth period of seed setting rate and 1000-grain weight were influ-enced by high-temperature elements in difference growth stages. The major influence of the high-temperature on the seed setting rate and 1000-grain weight in young spike and booting stage were high-temperature intension and duration time, and the temperature in night was closely to seed setting rate and 1000-grain weight in high-temperature period in rice heading filling period.