摘要
为明确1961—2020年四川盆区再生稻适栽区的变化特征及趋势,本研究基于种植制度将研究区分为5个水稻种植区,根据研究区内106个气象台站1961—2020年的日平均气温资料,结合再生稻安全生长季积温和日数及安全灌浆期日数,探究气候变化背景下研究区再生稻适栽区的分布特征及演变趋势。结果表明,从地理分布看,纬度北移1°,再生稻安全生长季活动积温减少100~150℃·d,安全生长季日数缩短4~6 d;海拔升高100 m,再生稻安全生长季日数缩短4~5 d,活动积温减少124~163℃·d。气候变化背景下,1961—2020年间,四川盆区再生稻安全生长季积温、日数以及安全灌浆期日数均随时间推移呈增加趋势;盆西平原区再生稻安全生长季活动积温和日数增幅最大,盆东平行岭谷区增幅最小。1961—2020年,四川盆区再生稻适栽区北界北移,空间分布呈由南向北、自东到西扩展的特征,适栽区面积占比由39.0%增至63.1%以上。综上,合理调整种植制度、选育适宜品种是气候变化背景下提高水稻生长季气候资源利用率的主要措施。本研究结果为四川稻区水稻种植布局和安全生产提供了理论参考。
In order to elucidate the changing characteristics and trends of suitable planted areas of ratoon rice in basin area of Sichuan Province during 1961 to 2020,the basin area was firstly divided into five rice planting areas according to cropping system.Using daily average temperature data from 106 weather stations during 1961 to 2020,combined with the accumulated temperature and days of the safe growth season,and the days of the safe grain-filling period of ratoon rice,the distribution characteristics and evolution trends of suitable growth areas of ratoon rice under the background of climate change were studied.The results showed that,based on the geographical distribution of the study region,the active accumulated temperature of ratoon rice in the safe growth season was decreased by 100-150℃·d with a migration of latitude northward by 1°,while the days of ratoon rice safe growth season was reduced by 4-6 days.With an altitude increase of 100 m,the active accumulated temperature of ratoon rice in the safe growth season was decreased by 124-163℃·d,and the days of ratoon rice safe growth season was reduced by 4-5 days.Under the background of climate change,the active accumulated temperature and days of ratoon rice safe growth season,and the days of ratoon rice safe filling period showed an increasing trend with time in basin area of Sichuan Province during 1961 to 2020.The increase of active accumulated temperature and days of ratoon rice safe growth season was the greatest in the western plain area of the basin,while the smallest increased in the eastern parallel ridge-and-valley area of the basin.From 1961 to 2020,the northern boundary of the suitable planting areas of ratoon rice had shifted northwards,and the spatial distribution had shown characteristic of expanding from east to west,from south to north,with the proportion of the suitable planting area increasing from 39.0%to 63.1%.In conclusion,rational adjustments of rice cropping system,and selection of suitable cultivars are main measures to improve the utilization of climate resources in the rice growth season under climate change.The results of this study provide theoretical references for the layout and safe production of rice cultivation in Sichuan Province.
作者
郭翔
胡蓉
王明田
李旭毅
GUO Xiang;HU Rong;WANG Mingtian;LI Xuyi(Sichuan Province Agro-meteorological Center,Chengdu,Sichuan 610071;Water-Saving Agriculture in Southern Hill Area Key Laboratory of Sichuan Province,Chengdu,Sichuan 610066;Sichuan Provincial Seed Station,Chengdu,Sichuan 610041;Sichuan Meteorological Observatory,Chengdu,Sichuan 610071;Crop Research Institute of Sichuan Academy of Agricultural Sciences,Chengdu,Sichuan 610066)
出处
《核农学报》
北大核心
2025年第4期846-855,共10页
Journal of Nuclear Agricultural Sciences
基金
四川省科技计划项目(2022YFN0006)
国家自然科学基金项目(32372226)。
关键词
气候变暖
再生稻
安全生长季
安全灌浆期
适栽区
climate warming
ratoon rice
safe growth season
safe filling period
suitable growth areas
