不同播期下豇豆品种适应性评价OA

[Objective]This study aimed to explore the effects of different sowing dates and varieties on the growth of early spring cowpea in southern Jiangxi,and to screen suitable varieties and sowing dates to provide technical support for its production.[Method]Three sowing dates were set:December 26th(T1),January 24th(T2),and February 7th(T3).Eight varieties,including Taili B-8(P1),Huagan 688(P2),Huagan Lvxiu(P3),Huagan Lüyu(P4),Wanzi Qianhong(P5),Huagan Chunxiu(P6),Haiyate(P7)and Yinlong Zaoguan(P8),were planted.The emergence rate,yield,cold resistance,and pest resistance indicators were measured,and comprehensive evaluation was conducted based on correlation analysis and principal component analysis.[Result]Temperature was a key limiting factor for the emergence of early spring cowpea.The December 26 sowing(T1)experienced daily average temperatures of 11.14–26.13℃and achieved a 90.31%emergence rate.However,due to low temperature and limited solar radiation during the January 24 sowing(T2),the daily average temperature dropped to 6.00-16.57℃,resulting in a decreased emergence rate of 75.75%.There were significant differences in cold tolerance among varieties.Taili B-8(P1)maintained a stable emergence rate of over 94%at all sowing dates,with a cold damage index of only 23.71,indicating strong adaptability to low temperatures.[Conclusion]Taili B-8 possesses excellent characteristics such as cold tolerance,insect resistance,and stable yield.It is recommended to plant it in early spring in the southern Jiangxi region.In the field,it is necessary to focus on preventing and controlling the thrips peak in mid-to-late May.For highly susceptible varieties,monitoring and comprehensive control measures need to be strengthened to ensure stable yield and increase income.