Relationship between malt qualities and beta-amylase activity and protein content as affected by timing of nitrogen fertilizer application / 浙江大学学报(英文版)(B辑:生物医学和生物技术)
Journal of Zhejiang University. Science. B
;
(12): 79-84, 2006.
Article
in English
| WPRIM
| ID: wpr-263222
ABSTRACT
The effects of different timing of N fertilizer application at the same rate on grain beta-amylase activity, protein concentration, weight and malt quality of barley were studied. Grain beta-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 beta-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 beta-amylase activity.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Plant Proteins
/
Time Factors
/
Hordeum
/
Beta-Amylase
/
Edible Grain
/
Chemistry
/
Statistics as Topic
/
Agriculture
/
Enzyme Activation
/
Fertilizers
Language:
English
Journal:
Journal of Zhejiang University. Science. B
Year:
2006
Type:
Article
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