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作 者:姜乐[1] 赵洪亮[1] 谢立勇[1] 王惠贞[1] 冯永祥[2]
机构地区:[1]沈阳农业大学农学院,辽宁沈阳110866 [2]黑龙江八一农垦大学农学院,黑龙江大庆163319
出 处:《华北农学报》2014年第3期136-141,共6页Acta Agriculturae Boreali-Sinica
基 金:国家自然科学基金项目(41175097)
摘 要:利用FACE(Free air CO2enrichment)试验平台,选取北方主栽品种松粳9号和稻花香2号为试材,研究CO2浓度增高(600μmol/mol)对不同水稻品种籽粒灌浆特性的影响。在FACE条件下,松粳9号的籽粒最大灌浆速率增幅为18.0%,平均灌浆速率增幅为17.6%,灌浆前期延长0.88 d,灌浆中期和后期缩短了2.04,1.44 d,总灌浆时间缩短2.60 d。稻花香2号经过FACE处理后到达最大灌浆速率的时间比对照晚4.27 d,并且最大灌浆速率低于对照6.8%,平均灌浆速率低于对照7.7%,灌浆前期比对照延长2.45 d,中期延长3.63 d,后期延长2.56 d。千粒质量和籽粒灌浆参数的相关性分析表明,粒重和灌浆速率的关系更为密切。说明不同水稻品种的灌浆特性对CO2浓度升高的响应存在差异,松粳9号的主要响应方式是灌浆速率的提高,而稻花香2号则是灌浆持续时间的延长。Effects of elevated( 600 μmol /mol) CO2concentration on grain-filling characteristics of different japonica rice cultivars were investigated using Songjing 9 and Daohuaxiang 2 by mini FACE( Free air CO2enrichment) experimental platform.In blossom,we Chose 100 stalks and put a notice plate with date on each one.From five days after blossom,each treatment was randomly taken 5 to 8 tassels,sampling time in the morning 10- 12,a total of five times.After sampling 105 ℃ heating 30 min,then 70 ℃ drying to constant weight,get rid of the empty grain and ill grain,select 200 grains' weight converted into thousand-grain weight.Using the logistic equation for the filling process of dynamic fitting analysis.The results showed that the maximum and average grain-filling rate of Songjing 9 was increased by 18% and 17.6% under mini FACE.The duration of early grain-filling of Songjing 9was prolonged for 0.88 d,while the duration of total grain-filling was shortened by 2.60 d under mini FACE.The day of maximum grain-filling rate of Daohuaxiang 2 was delayed for 4.27 d,and the maximum and average grainfilling rate was decreased by 6.8% and 7.7%.The duration of early,middle and late grain-filling was prolonged for2.45,3.63,2.56 d.The results indicated that grain-filling characteristics of different rice varieties respond to elevated CO2concentration difference.The filling rate of Songjing 9 will be quickly and the filling stage of Daohuaxiang2 will be longer.The results of the study can improve and genetic improvement of rice cultivation measures to provide certain theory reference and practice basis.
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