| 不同施氮水平和基追比对小麦籽粒品质形成的调控 |
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| 引用本文： | 戴廷波,孙传范,荆奇,姜东,曹卫星.不同施氮水平和基追比对小麦籽粒品质形成的调控[J].作物学报,2005,31(2):248-253. |
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| 作者姓名： | 戴廷波 孙传范 荆奇 姜东 曹卫星 |
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| 作者单位： | 南京农业大学农业部作物生长调控重点开放实验室，江苏南京 210095 |
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| 基金项目： | 国家自然科学基金，江苏省自然科学基金 |
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| 摘 要： | 采用蛋白质含量不同的2个小麦品种，研究了不同施氮水平（112.5 kg N/hm2和225 kg N/hm2）及基追比（基肥∶追肥为66/34和34/66）对小麦植株C-N积累与转运规律及其与小麦籽粒品质形成的关系。结果表明，高氮水平和追肥比例提高了小麦籽粒蛋白质、面筋含量、沉降值和谷/醇溶蛋白比例，降低了花后营养器官贮存氮素和干物质的转
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| 关 键 词： | 小麦 氮肥水平 基追比 碳/氮运转 品质形成 |
| 收稿时间： | 2003-10-20 |
| 修稿时间： | 2003年10月20 |
Regulation of Nitrogen Rates and Dressing Ratios on Grain Quality in Wheat |
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| DAI Ting-Bo,SUN Chuan-Fan,JING Qi,JIANG Dong,CAO Wei-Xing.Regulation of Nitrogen Rates and Dressing Ratios on Grain Quality in Wheat[J].Acta Agronomica Sinica,2005,31(2):248-253. |
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| Authors: | DAI Ting-Bo SUN Chuan-Fan JING Qi JIANG Dong CAO Wei-Xing |
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| Affiliation: | Key Laboratory of Crop Growth Regulation，Ministry of Agriculture，Nanjing Agricultural University, Nanjing 210095 Jiangsu |
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| Abstract: | Field experiments were conducted to investigate the effects of nitrogen rates and dressing ratios on grain quality formation and characteristics of post-anthesis carbon and nitrogen assimilation and transfer, using wheat cultivars with different grain protein contents, i.e. Xuzhou 26 (high protein) and Huaimai 18 (low protein). The results showed that wheat yield was higher at nitrogen ratio of 34/66 under high nitrogen level and at 66/34 ratio under low nitrogen level. High nitrogen rate and dressing ratio increased the contents of protein, gluten, sedimentation value and glutenin/gliadin ratio, reduced the proportions of N and dry matter transfer to grains after anthesis, but increased N transfer amount as compared with low N rate and dressing ratio. Grain protein content was significantly correlated with N accumulation at anthesis and N transfer amount after anthesis, and not correlated with post-anthesis N assimilation, proportions of N transfer and dry matter transfer.Starch content was negatively correlated with amount and proportion of N transfer after anthesis. It is suggested that increasing N accumulation at anthesis and transfer amount to grains after anthesis are favorable for improving protein content and regulating grain quality. Moreover, increasing total N rate and dressing ratio during medium growth stage is an important approach for increasing grain yield and protein content. |
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| Keywords: | Wheat Nitrogen rate Dressing ratio C-N transfer Grain quality |
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