it was found that there were changes to some extent in the main characters of the days from seeding to initial heading, plant height and seed setting rate when the seeds of the tested hybrid rice combinations and their parents were sowed at different time in hainan for the seed purity identification, and the changing extent was different between some hybrids and their parents, which would affect the accuracy of purity identification 摘要通過(guò)比較不同播種時(shí)期雜交水稻種子樣品在海南種植鑒定的農(nóng)藝性狀表現(xiàn),發(fā)現(xiàn)播始?xì)v期、株高、結(jié)實(shí)率等主要性狀均表現(xiàn)出不同程度的變化,且部分組合與其親本的變化幅度不同,從而影響鑒定的準(zhǔn)確性。