Effects of Nitrogen Application Rate on the Quality of Two-Line Hybrid Wheat
To study the effects of different nitrogen application levels on the quality of hybrid wheat,four wheat hybrid combinations,one conventional variety,and four nitrogen fertilizer levels were selected for field experiments at the Shunyi Wheat Base of the Beijing Academy of Agriculture and Forestry Sciences.The results showed that there were significant differences in various quality traits among combinations(varieties);The level of nitrogen fertilizer had effects on grain bulk density,protein content,gluten index,hardness,wet gluten content,formation time,and stability time.Among them,the effects on bulk density,gluten index,and protein content reached a significant or extremely significant level,but the degree of influence of nitrogen fertilizer level on various traits among combinations(varieties)was not the same;The yield and water absorption rate were little affected by the nitrogen application levels.By reducing nitrogen application,the protein content,wet gluten content,and stable time of the conventional variety Jingdong 17 significantly decreased,while the gluten index significantly increased;The protein content,wet gluten content,and stability time of BH3768 showed a decreasing trend;The bulk density of Jingmai 21,BH3606,and BH9613 significantly increased;The gluten index of Jingmai 21 significantly increased,the formation time significantly decreased,and there was no significant difference between the protein content and wet gluten content;The grain hardness,protein content,and wet gluten content of BH3606 seeds showed a decreasing trend;There was no significant difference in protein content,wet gluten content,and gluten index of BH9613 under different treatments,but the formation time and stability time showed a significant upward trend.Nitrogen application levels had no effect on protein or wet gluten contents of Jingmai 21 and BH9613.In addition to being distinct from other combinations(varieties),the dough formation and stability time of BH9613 demonstrated an increasing trend with the reduction of nitrogen application.
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