| 车子强,蒋桂英,王海琪,王荣荣,尹豪杰.施氮量对滴灌春小麦茎鞘NSC积累与转运的影响[J].干旱地区农业研究,2023,(5):99~109 |
| 施氮量对滴灌春小麦茎鞘NSC积累与转运的影响 |
| Effects of nitrogen application rate on NSC accumulation and translocation in stem sheath of spring wheat under drip irrigation |
| |
| DOI：10.7606/j.issn.1000-7601.2023.05.11 |
| 中文关键词: 春小麦 滴灌 施氮量 茎鞘节位 果聚糖 NSC |
| 英文关键词:spring wheat drip irrigation nitrogen amount stem sheath node fructcan non\|structural carbohydrates |
| 基金项目:国家自然科学基金(31760346) |
|
| 摘要点击次数: 586 |
| 全文下载次数: 634 |
| 中文摘要: |
| 在新疆气候条件下，为明确滴灌春小麦不同茎鞘节位果聚糖和NSC向籽粒转运提高产量的氮素响应机制，采用裂区试验设计，以强筋小麦‘新春37号’（XC37）、中筋小麦‘新春6号’（XC6）为主区，分别以施氮量300、255、210、0 kg·hm-2为副区，研究施氮量对滴灌春小麦茎鞘不同节位(穗下节间、倒二节间、其余节间) 果聚糖和非结构碳水化合物（NSC）的积累转运及其对产量贡献的影响。结果表明，随生育期的推进，两个品种春小麦茎鞘蔗糖果糖基转移酶(SST)活性、果聚糖含量、NSC含量及茎鞘干物质量呈先升后降的变化趋势，而果聚糖外水解酶(FEH)活性则为先降后升再降的趋势，各指标均以施氮量255 kg·hm-2处理表现最优；各节位相比，其余节果聚糖代谢酶活性、果聚糖含量、NSC含量以及茎鞘干物质量最大，其果聚糖、NSC以及茎鞘干物质对产量贡献率分别比倒二节高11.18%~35.77%、14.77%~45.65%和25.81%~33.83%；两品种比较，XC37茎鞘中贮藏物质积累运转效率高于XC6，其果聚糖、NSC以及茎鞘干物质对产量贡献率分别比XC6高32.53%~116.74%、26.06%~35.26%和6.32%~21.73%；施氮量与品种互作效应对果聚糖、NSC花前转运率和贡献率及其穗下节干物质对产量贡献率均有显著影响。研究表明，果聚糖和NSC代谢及产量在施氮量为255 kg·hm-2时表现最佳，该施氮量是新疆滴灌春小麦适宜的施氮水平。 |
| 英文摘要: |
| In order to clarify the nitrogen response mechanism of fructan and NSC transport to grain under drip irrigation in spring wheat, a split\|plot experiment was conducted with strong sinew wheat ‘Xinchun 37’(XC37) and middle sinew wheat ‘Xinchun 6’(XC6) as the main plots. We examined the effects of nitrogen application rates of 300, 255, 210 kg·hm-2 and 0 kg·hm-2 on the accumulation and transport of fructose and NSC and their contribution to yield at different nodes of stem and sheathe (peduncle internode, penultimate internode, and other internodes) of spring wheat under drip irrigation. The results showed that the activities of sucrose fructosyl transferase (SST), fructan content, NSC content and stem sheath dry matter weight of the two varieties of spring wheat increased first and then decreased, while the activity of exofructan hydrolase (FEH) decreased first and then increased and then decreased，each index had the best performance of 255 kg·hm-2. The activity of fructan metabolizing enzyme, fructan content,NSC content and stem sheath dry matter weight of the other internodes were the highest，and the contribution rate of fructan, NSC and stem sheath dry matter to yield was 11.18%~35.77%,14.77%~45.65% and 25.81%~33.83% higher than that of the penultimate internode, respectively. Compared with XC6, the efficiency of storage material accumulation in stem sheath of XC37 was higher than that of XC6. The contribution rate of fructans, NSC and stem sheath dry matter to yield of XC37 was 32.53%~116.74%, 26.06%~35.26% and 6.32%~21.73% higher than that of XC6, respectively. The interaction effect between nitrogen application rate and variety had significant effects on the preanthesis transport rate and contribution rate of fructan，NSC pre\|flower transport and the contribution rate of dry matter of peduncle internode to yield. In conclusion，the metabolism and yield of fructan and NSC were the best when the nitrogen application level was 255 kg·hm-2，which was the appropriate nitrogen application level for spring wheat under drip irrigation in Xinjiang. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |