侯献飞,孙万仓,方彦,武军艳,刘自刚,刘林波,钱武,马骊,陈奇.甘蓝型冬油菜在西北寒旱区适应性分析[J].干旱地区农业研究,2016,34(6):63~68 |
To study the suitability of Brassica napus L. in cold and dry regions of northwest China, in this study, 29 lines of Brassica napus L. were compared on their winter-survival, growth period, yield components, oil content and agronomic traits in Tianshui and Lanzhou. The results showed that wintering rates of all tested lines in Tianshui site were higher than those in Lanzhou. In Tianshui, over-wintering rates of 21 tested lines were higher than 80.0% in. However, in Lanzhou, the average over-wintering rate with mulching was 14.49% and the highest was 48.5% for Pinggan 1. The combined variance showed that pilot climate difference was the main reason causing the difference in over-wintering rate. Compared with those in Tianshui, northward-expanded (Lanzhou) rapeseed plants exhibited great changes in the progression of growth, as reflected mainly by the significantly prolonged over-wintering period, shortened growth period in post-winter and prolonged whole growth period. In Tianshui, plant height, branch height, length of main florescence, 1000-seed weight, yield per 667 m2 and averaged oil content were 133.52 cm, 32.79 cm, 51.37 cm, 3.15 g, 184.20 kg and 40.16%, higher than those of 22.11 cm, 31.58 cm, 2.47 cm, 0.66 g, 160.54 kg and 22.54% in Lanzhou. The variation analysis showed that in Tianshui, the over-wintering rate, the main agronomic traits, yield and oil content variation coefficient were relatively stable, less than those in Lanzhou. In conclusion, it is indicated that Tianshui has the characteristics of outstanding over-wintering rate, good agronomic characters, high yield, high oil content, and wide adaptation. |