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doi:  10.12013/qxyjzyj2019-037
小时尺度有效积温在水稻出苗期预测中的应用

Application of hourly-scale effective accumulated temperature in emergence date prediction
摘要点击 98  全文点击 76  投稿时间:2019-07-03  修订日期:2019-08-12
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基金:  中国气象局气候变化专项(编号:CCSF201840);2019年中国气象局国内外作物产量气象预报专项“基于作物模型的双季稻气象灾害影响评估研究”; 2016年江西省气象局重点科研项目“早春气候资源在水稻生产中的利用技术研究”.
中文关键词:  小时尺度,有效积温,播种出苗期,预测
英文关键词:  hourly scale  effective accumulated temperature  seeding emergence period  prediction
                 
作者中文名作者英文名单位
蔡冠勋Cai Guanxun江西省气象局
姚俊萌Yao Junmeng江西省农业气象中心
段里成Duan Licheng江西省农业气象中心
郭瑞鸽Guo Ruige江西省农业气象中心
蔡 哲Cai Zhe江西省农业气象中心
张 坤Zhang Kun江西省农业气象中心
引用:蔡冠勋,姚俊萌,段里成,郭瑞鸽,蔡 哲,张 坤.2019,小时尺度有效积温在水稻出苗期预测中的应用[J].气象与减灾研究,42(3):231-235
中文摘要:
      为改善日尺度有效积温未考虑日内气温变化的缺陷,分析小时尺度有效积温的应用范围,从而更准确地评估水稻生育期内热量需求。文中以南昌县塔城乡2018年10个播期直播早稻(中嘉早17)为研究对象,比较不同播期处理下播种—出苗始期日尺度有效积温和小时尺度有效积温的差异,结果表明:1) 当日平均气温>12 ℃且日最低气温<12 ℃时,日尺度有效积温不为0 ℃·d,但小于小时尺度有效积温;当日平均气温≤12 ℃时且日最高气温>12 ℃,日尺度有效积温为0 ℃·d,而小时尺度有效积温不为0 ℃·d。在日平均气温接近生物学下限温度时采用小时尺度计算有效积温更为有效。2) 利用小时尺度确定了中嘉早17品种播种—出苗始期所需的积温阈值为54.46 ℃·d,出苗日数与播种期呈极显著的二次函数关系,且播期每推迟5 d,出苗日数将平均缩短2 d。
Abstract:
      Compared to daily scale effective accumulated temperature not containing 24 hour temperature variation, hourly scale is an effective option to assess heat demand during the growing period of rice. Based on the 10 sowing date treatments of early rice (Variety: ZhongjiaZao 17), the performances of daily and hourly scale effective accumulated temperature were compared. The results showed that when the average temperature was higher than 12 ℃ and the minimum temperature lower than 12 ℃, daily scale effective accumulated temperature was not 0 ℃·d, but less than that of hourly scale; while the average temperature was less than 12 ℃, daily scale effective accumulated temperature might be 0, and hourly scale could better capture the effective temperature as the daily average temperature close to the biological lower limit temperature. The effective accumulated temperature threshold of seeding emergence period for ZhongjiaZao 17 was calculated to be 54.46 ℃·d using hourly scale, and the number of emergence days and sowing dates presented significant quadric relationship. When the sowing date was delayed every 5 days, the emergence days would be 2 days shortened on average.
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