8Rathke G W, Christen O, Diepenbreck W. Effects of nitrogen source and rate on productivity and quality of winter oilseed rape (Brasslca napus L. ) grown in different crop rotations[J]. Field Crops Research, 2005, 94(2 - 3) : 101 -113.
8Campbell D C, Kondra Z P. A genetic study of growth characters and yield characters of oilseed rape [ J ]. Eu- phytica, 1978,27 : 177 - 183.
9Campbell D C, Kondra Z P. Growth pattern analysis of three rapeseed cultivars [ J ]. Canadian Journal of Plant Science, 1977,57:707 -712.
10Amiri- Oghan H, Fotokian M H, Javidfar F, et al. Ge- netic analysis of grain yield, days to flowering and maturi- ty in oilseed rape (Brassica napus L. ) using diallel cros- ses [ J ]. International Journal of Plant Production, 2009,3 (2) :19 -26.