引用本文:吴晓丽,汤永禄,李朝苏,吴 春,黄 钢. 不同生育时期渍水对冬小麦旗叶叶绿素荧光及籽粒灌浆特性的影响[J]. 中国生态农业学报(中英文), 2015, 23(3): 309-318
WU Xiaoli,TANG Yonglu,LI Chaosu,WU Chun,HUANG Gang. Effect of waterlogging at different growth stages on flag leaf chlorophyll fluorescence and grain-filling properties of winter wheat[J]. Chinese Journal of Eco-Agriculture, 2015, 23(3): 309-318
DOI:10.13930/j.cnki.cjea.140975
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不同生育时期渍水对冬小麦旗叶叶绿素荧光及籽粒灌浆特性的影响
吴晓丽, 汤永禄, 李朝苏, 吴 春, 黄 钢
四川省农业科学院作物研究所 成都 610066
摘要:  渍害是南方稻茬小麦高产障碍因子之一。2011-2013年以小麦品种'川麦104'和'内麦836'为材料, 设置对照(CK)和不同时期渍水处理(分蘖期、拔节期、孕穗期、灌浆期, 渍水时间均为35 d), 测定花后旗叶叶绿素含量(SPAD值)、叶绿素荧光参数和籽粒灌浆参数, 以明确不同生育期渍水对小麦光合特性及籽粒灌浆的影响。结果表明, 随时间推移, 花后0~25 d, 两品种的SPAD值和叶绿素荧光参数(Fv/FmFv/F0ΦPSⅡ、qP和NPQ)变化不大; 到花后35 d, SPAD值、Fv/FmFv/F0ΦPSⅡ急剧下降, NPQ明显上升。渍水处理对花后15 d和25 d的SPAD值和多数叶绿素荧光参数无显著影响; 花后35 d, 分蘖期渍水和灌浆期渍水的SPAD、Fv/FmFv/F0ΦPSⅡ和qP显著高于对照, NPQ则显著低于对照。分蘖期渍水和灌浆期渍水对粒重及籽粒灌浆进程影响较小, 拔节期渍水和孕穗期渍水显著提高了灌浆速率、缩短了灌浆持续时间, 粒重较低。粒重与SPAD值呈显著正相关, 粒重和SPAD值均与灌浆速率无相关性, 但与灌浆持续时间(有效灌浆期和活跃灌浆期)、尤其灌浆中后期(快增期和缓增期)呈显著正相关。'川麦104'在灌浆期均表现出较高SPAD值、Fv/FmFv/F0ΦPSⅡ和qP。结果表明, 分蘖期渍水和灌浆期渍水对旗叶花后光合能力及灌浆进程影响较小, 在四川稻茬小麦栽培管理中, 应重视拔节期和孕穗期渍害的排除, 以保证花后较高的光合能力及较长籽粒灌浆时间, 从而保证较高粒重。
关键词:  冬小麦 生育期 渍水 SPAD 叶绿素荧光 灌浆特性 粒重
中图分类号:
基金项目:国家现代农业产业技术体系建设资金(CARS-3-1-23)和四川省农业科学院青年基金项目资助
Effect of waterlogging at different growth stages on flag leaf chlorophyll fluorescence and grain-filling properties of winter wheat
WU Xiaoli, TANG Yonglu, LI Chaosu, WU Chun, HUANG Gang
Institute of Crop Research, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Abstract:  Waterlogging is one of the most common factors limiting crop production of wheat-rice system in southern China. Wheat varieties 'Chuanmai104' and 'Neimai836' were used in 2011 2013 growing season to study chlorophyll fluorescence parameters of flag leaf and grain-filling properties of wheat under waterlogging at different growth stages (tillering, jointing, booting and grain-filling stages, with waterlogging duration of 35 days). The study explored the photosynthetic capacity and grain-filling traits under waterlogging in the region. Relative chlorophyll content (SPAD reading) and chlorophyll fluorescence parameters were measured using SPAD-502 and photon systems instruments, grain-filling process under waterlogging at different growth stages were fitted with Richard's equation. The results showed little change over time in SPAD value and chlorophyll fluorescence parameters (Fv/Fm, Fv/F0, ΦPSⅡ, qP and NPQ) at 15 and 25 days after anthesis. However, sharp decreases in Fv/Fm, Fv/F0 and ΦPSⅡ and obvious increase in NPQ were noted at 35 days after anthesis. There was no significant difference between waterlogging treatments and CK in terms of SPAD reading and chlorophyll fluorescence parameters (Fv/Fm, Fv/F0, ΦPSⅡ and qP) 15 and 25 days after anthesis. Also 35 days after anthesis, waterlogging at tillering stage and grain-filling stage increased SPAD, Fv/Fm, Fv/F0, ΦPSⅡ and qP, and decreased NPQ, compared with CK. Waterlogging at tillering and grain-filling stages had less effect on grain-filling, while waterlogging at jointing and booting stages improved grain-filling rate while shorten grain-filling duration resulting in lower grain weight. Grain weight had significant positive correlation with SPAD, but not significantly correlated with grain-filling rate. Grain weight was also significantly correlated with effective grain-filling duration and active grain-filling duration. This was especially obvious for fast-increasing and slowly-increasing grain-filling periods. 'Chuanmai104' had higher SPAD and Fv/Fm, Fv/F0, ΦPSⅡ and qP. In the study area, it was necessary to pay more attention to waterlog draining at jointing and booting stages to ensure higher photosynthetic capacity, longer grain-filling duration and higher grain weight.
Keyword:  Winter wheat  Growth stage  Waterlogging  SPAD  Chlorophyll fluorescence  Grain-filling trait  Grain weight
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