Study on the Growth and Yield of Super Rare-planted Hybrid Rice with Long Age and Strong Seedling

ZHANG Gen et al(College of Life Science and Engineering,Southwest University of Science and Technology,Mianyang,Sichuan 621010)  

[Objective] The purpose of the study was to know the influence of long age and strong seedling on the growth and yield of super rare-planted hybrid rice.[Method] 3 seedling age treatments of T1(30 d),T2(42 d) and T3(54 d) were set up to study the growth and yield of Byou 827,Gangyou 725 and Dyou 527 when they were super rare-planted.[Result] The highest tillering stages of the 3 varieties were delayed along with the prolonging of seedling age.The maximum tiller numbers per plant of the same variety in different treatments had no obvious difference.The average available ear numbers per plant of Gangyou 725 were T1T2T3,and that of the other 2 varieties were T2T1T3.The proportion of secondary tillering ears to total available ears of the 3 varieties decreased and that of the third tillering ears increased in T3 treatment.The effective yields of Byou 827 and Dyou 527 were T1T2T3,and that of Gangyou725 was T2T1T3.The responses of different varieties to seedling age duration had obvious difference.[Conclusion] Seedling age had some influences on tillering dynamic,available ear and its component,economic character and yield of super rare-planted hybrid rice.Based on well management,and choosing varieties reasonably,super rare-planted hybrid rice with long age and strong seedling could also keep high-yield level.

【Fund】： 国家“十一五”科技支撑计划重大项目(2006BAD02A05)
【CateGory Index】： S511

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