Effects of Nitrogen Application and Water Stress at Flowering Stage on Yield Performance Parameters and Nitrogen Use Efficiency in Rapeseed with Different Nitrogen Use Efficiency

doi:10.7668/hbnxb.2015.02.037

Abstract

Abstract: The research related to effects of water stress on nitrogen fertilizer use efficiencies of different nitrogen use efficiency genotypes of rapeseed is few.Four different NUE rapeseed cultivars with high N use efficiency (Monty and Xiangyou 15) as well as low N use efficiency (R210 and Bin270), were used with three nitrogen applications(0.05, 0.2, 0.4 g/kg).Pot experiment was conducted in greenhouse to determine the effects of nitrogen application and water stress at flowering stage on yield performance parameters and nitrogen use efficiency of different nitrogen use efficiency genotypes of rapeseed.The results showed that the growth of rapeseed was obviously inhibited, the yield, yield performance parameters and nitrogen use efficiency were significantly decreased under the water stress.Pod number per plant, dry matter amount, nitrogen harvest index and yield of all of the rapeseed in the MN(0.2 g/kg ) treatment was higher than in LN(0.05 g/kg) treatment and in HN(0.4 g/kg) treatment with the different nitrogen rate because of nitrogen nutrient deficiency or excess salt stress.The effect of water to rapeseed growth was greater than the effect of nitrogen nutrients, high nitrogen use efficiency genotype rapeseed could slow the endanger of water stress to rapeseed growth.Suitable applying nitrogen under water stress could reduce the effects of drought on growth of winter rapeseed, Monty and Xiangyou 15 with high nitrogen use efficiency was more adaptable to water and nitrogen stress than R210 and Bin270 with low nitrogen use efficiency.

Key words: Rapeseed, Nitrogen application, Water stress, Yield, Nitrogen use efficiency

CLC Number:

S143.1

ZOU Xiao-yun, LIU Bao-lin, SONG Lai-qiang, ZOU Xiao-fen, CHEN Lun-lin, XIONG Jie, LI Shu-yu, GUAN Chun-yun. Effects of Nitrogen Application and Water Stress at Flowering Stage on Yield Performance Parameters and Nitrogen Use Efficiency in Rapeseed with Different Nitrogen Use Efficiency[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(2): 220-226. doi: 10.7668/hbnxb.2015.02.037.

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