| Relationship between malt qualities and β-amylase activity and protein content as affected by timing of nitrogen fertilizer application |
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| 作者姓名： | Chen JX Dai F Wei K Zhang GP |
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| 作者单位： | Department of Agronomy, Zhejiang University, Hangzhou 310029, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 30270779） and the Special Research Foundation for Doctor Discipline of Chinese Universities （No. 20020335028） |
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| 摘 要： | The effects of different timing of N fertilizer application at the same rate on grain β-amylase activity, protein concentration, weight and malt quality of barley were studied. Grain β-amylase activity and protein concentration were significantly higher in treatments where all top-dressed N fertilizer was applied at booting stage only or equally applied at two-leaf stage and booting stage than in the treatment where all top-dressed N fertilizer was applied at two-leaf age stage only. On the other hand, grain weight and malt extract decreased with increased N application at booting stage. There were obvious differences between barley varieties and experimental years in the grain and malt quality response to the timing of N fertilizer application. It was found that grain protein concentration was significantly and positively correlated with β-amylase activity, but significantly and negatively correlated with malt extract and Kolbach index. The effect of grain protein concentration on malt quality was predominant over the effect of grain β-amylase activity.
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| 关 键 词： | Barley Nitrogen fertilizer β-amylase Malt quality |
| 收稿时间： | 2005-08-25 |
| 修稿时间： | 2005-10-05 |
| 本文献已被 CNKI 维普 PubMed SpringerLink 等数据库收录！ |
