江西农业学报2023，Vol.35Issue(11)：102-106,113,6.DOI:10.19386/j.cnki.jxnyxb.2023.11.015
江西省不同播期早稻热量资源利用分析
Analysis of Heat Resource Utilization of Early Rice Sown on Different Dates in Jiangxi Province
摘要
Abstract
Based on daily average temperature data from 1961 to 2022 collected from 83 weather stations in Jiangxi Province,we analyzed the change characteristics of heat resources and the differences of heat resources at different sowing dates of beginning date of 10℃ in different regions of Jiangxi Province in the past 62 years,the normal sowing time of farmers and the sowing time of early sowing demonstration sites in 85 counties in 2022 by climate tendency rate and MK mutation analysis.The results showed that:(1)The normal sowing time of early rice was more than 10 days later than that of early rice and beginning date of 10℃,and the sowing time in southern Jiangxi was earlier than that in northern Jiangxi.(2)The average temperature and accumulated temperature during the whole growth period of each sowing date showed increasing trend,the upward trend of early sowing and beginning date of 10℃ were more obvious than that of normal sowing.The average temperature of the whole growth period was significantly higher than that of early sowing and beginning date of 10℃,and the accumulated temperature was significantly lower than that during the whole growth period of early sowing and beginning date of 10℃.(3)Compared with the normal sowing date,the increase of accumulated temperature in the whole growth period of early sowing and beginning date of 10℃ were higher in southern than in northern Jiangxi Province,and the accumulated temperature in the whole growth period of early sowing and beginning date of 10℃ were more than 8.00% higher in southern Jiangxi Province.(4)The mutation test showed that the mean temperature and accumulated temperature of each sowing period were around 2000.Therefore,under the condition of normal sowing date,it is beneficial to extend the growing season of early season rice and improve the utilization rate of local heat resources if the sowing time of early rice is properly advanced.关键词
早稻/气候倾向率/MK突变检验/正常播期/稳定通过10℃初日/热量资源Key words
Early rice/Climate tendency rate/MK mutation test/Normal sowing date/Beginning date of 10℃/Heat resource分类
农业科技引用本文复制引用
孔祥胜,段里成,郭瑞鸽,蔡哲..江西省不同播期早稻热量资源利用分析[J].江西农业学报,2023,35(11):102-106,113,6.基金项目
江西省气象局重点项目(JX2021Z05) （JX2021Z05）
南昌市农业气象重点实验室开放研究基金(2022NNZS101). （2022NNZS101）
