油菜新品种油研5号适宜播种期研究

STUDY ON PROPER SOWING DATE OF NEW RAPE VARIETY YOUYAN 5

经连续两年３个点播种期试验表明，油研５号在我省的适宜播种期是９月中旬，在海拔较高地区可提前到９月５日。在适宜播种期内播种，也会有少数的早花株发生。若冬前早花株率在５％以内，群体长势又好的田块，对产量无影响。

Two years' expriments of sowing date for rape on three experimental sites indi-cated that Youyan 5 was proper to be sown in the middle of September in Guizhouprovince,and could be sown in as early as September 5 in the higher elevation areas.Athough the proper sowing date,several early blossoming plants were also observed.But as long as the rate of early blossoming plants was less than five percent,its yieldwas proved not to be affected.