Effect of different cultivation measures on cold resistance of Brassica napus L.
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    Abstract:

    Eleven rapeseed (Brassica napus L.) varieties were analysed for their cold resistance with respect to different cultivation measures,such as sowing time,spraying uniconazole during seedling growth,fertilizer types and fertilizer volume.The results showed a significant difference in the cold resistance among ten varieties under the condition of early sowing (October 1st) because of the bolting and flowering periods at a low temperature of -4-4℃ in overwintering period,and the freeze injury index ranged between 25.0 and 82.5.Of note,the variety of zhongyou116 and 28-2010 exhibited the highest cold resistance among different varieties.However,no significant difference was observed among late sowing varieties,and all varieties exhibited less frost damage,the freeze injury index ranged between 24.2 and 29.2.Moreover,by spraying uniconazole during seedling growth,there was a general increase in the cold resistance among different varieties.The average freeze injury index of different varieties was reduced by 4.76.Under assortative applying with different quantities of N,P and K,no significant difference was observed among different varieties,but the use of an organic fertilizer was found to increase the cold resistance.According to above observations,the author proposed a comprehensive report of the cultivation measures of rapeseed with respect to cold resistance.

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徐正华,张晓红,陈秀斌,郑红裕,胡立勇. Effect of different cultivation measures on cold resistance of Brassica napus L.[J]. Jorunal of Huazhong Agricultural University,2012,31(6):661-667.

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