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- W2348853517 abstract "Under hydroponic group conditions,six typical rice genotypes were selected to investigate the characteristics of dry matter accumulation and distribution under three nitrogen levels of 5,15 and 25mg·kg-1.Nitrogen use efficiency for dry matter(NUEdm) and nitrogen use efficiency for grain yield(NUEg) were obviously different between different rice genotypes under three N levels.And then,six different nitrogen efficiency genotypes can be classified into two types of nitrogen-efficient and nitrogen inefficient.NUEdm increased with the nitrogen levels.Whereas,NUEg firstly increased and then decreased with the increase of nitrogen.At the four critical stages,there are significant differences in dry matter accumulation between two NUE types of rice genotypes under different N levels.At maturing stage,the ratios of culm and sheath,root,panicle dry weight to entire plant dry matter accumulation were significantly affected by N levels.At the same level of nitrogen,the average ratios of culm and sheath,root and leaves dry weight to entire plant dry matter accumulation were higher in N-inefficient genotype than that in N-efficient genotype.On the contrary,the ratio of panicle dry weight to entire plant dry matter accumulation was higher in N-efficient genotype than that in N-inefficient genotype.Significant effects of nitrogen levels were observed on the rice yield between different NUE types.N-efficient rice yields were higher than nitrogen-inefficient at the same nitrogen level.What's more,with the nitrogen level increasing,the difference of yield was more obviouser.Each organ proportion was relatively weak correlation with NUE.Correlation analysis also demonstrated that the dry matter accumulation at four critical stages of rice,the yield and the grain numbers per panicle were significantly correlated with the NUEg and NUEdm between different NUE types under different N levels." @default.
- W2348853517 created "2016-06-24" @default.
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- W2348853517 date "2012-01-01" @default.
- W2348853517 modified "2023-09-26" @default.
- W2348853517 title "EFFECTS OF NITROGEN LEVELS ON DRY MATTER ACCUMULATION AND DISTRIBUTION IN RICE GENOTYPE WITH DIFFERENT NITROGEN USE EFFICIENCIES" @default.
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