Genotypic variation in some quality traits of malt barley ( <i>Hordeum vulgare</i> L.) caused by time of nitrogen application and kernel position within spike
2005
Sardana, Virender | Zhang, Guo-Ping
The effect of time of nitrogen application and position of kernels in spike on kernel weight, protein content, β-amylase activity and β-glucan content were examined in two cultivars of barley. Cultivar 92-11 produced significantly bold kernels and lower β-glucan content with slightly lower protein content and higher β-amylase activity than cultivar Xiumei 3. Time of nitrogen application significantly influenced the quality parameters studied. Application of 110 kg N/ha at tillering produced significantly higher kernel weight and significantly lower protein content as well as β-glucan content as compared to its application made at boot stage. β-Amylase activity was also lowest in case of nitrogen applied at tillering stage. There were significant differences between two cultivars for quality parameters when kernels were selected from different spike positions or where specific plant part was removed at heading. The highest 1000-kernel weight was recorded in 92-11 (52.5%) with removal of side tillers and in Xiumei 3 (42.2%) from the middle portion of spike; whereas for protein content, opposite trend was obtained. β-Amylase activity in both cultivars was the highest when middle portion of spike was removed. The lowest β-glucan contents in 92-11 and Xiumei 3 were registered with removal of flag leaf and in Xiumei 3 with the removal of middle portion of spike.
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