Identification of Nitrogen Efficiency Types of Spring Wheat Varieties in Xinjiang
In order to provide theoretical basis for rational application of nitrogen fertilizer and screen nitrogen efficient spring wheat varieties in Xinjiang,seven main Xinjiang spring wheat cultivars were cultivated under four nitrogen levels in field conditions.The nitrogen levels include pure N(N0:0 kg/hm2),low nitrogen(LN:100 kg/hm2 pure N),medium nitrogen(MN:pure N of 200 kg/hm2)and high nitrogen(HN:300 kg/hm2 pure N).Nine agronomical traits such as plant height,panicle long,leaf area index,kernels per spike,grain weight per spike,spike number per unit area,SPAD value,thousand kernel weight and yield were analyzed by principal component analysis.Accordingly,different nitrogen efficiency types of the seven spring wheat varieties were divided.The results showed that the coefficient of variation between different agronomical traits possessed great differences.Four traits such as leaf area index(X3),panicle grain weight(X5),SPAD value(X7)and yield(X9)showed significant difference in terms of the mean value of each trait.Three traits,namely,X4(number of grains per panicle),X7(SPAD value)and X9(yield)are highly correlated to the nitrogen efficiency of different spring wheat varieties,and thus can be used as the main index to differentiate the nitrogen efficiency of spring wheat varieties in Xinjiang.According to the different P values of nitrogen efficiency under different nitrogen application treatments,the seven spring wheat varieties in Xinjiang can be divided into four nitrogen efficiency types,these are nitrogen high efficiency type,low nitrogen high efficiency type,high nitrogen high efficiency type and nitrogen low efficiency type.'Xinchun37'was nitrogen efficient.'Xinchun43'and'Xinchun47'were nitrogen inefficient.'Hechun614'and'Xinchun48'were low nitrogen and high efficiency types.'Hechun137'and'Hechun615'were high nitrogen and high efficiency types.This study has important theoretical significance for the breeding,popularization and application of nitrogen efficient wheat varieties in Xinjiang.
Spring wheatComprehensive value of nitrogen efficiencyType of nitrogen efficiency
万方数据
维普
