施氮量对超级杂交中稻生育后期剑叶叶绿素荧光特性的影响  

Effects of Nitrogen Fertilizer Level on Chlorophyll Fluorescence Characteristic in Flag Leaf of Super Hybrid Rice at Late Growth Stage

作　　者：龙继锐[1] 马国辉[1] 万宜珍[1] 宋春芳[1] 孙健 

机构地区：[1]湖南杂交水稻研究中心杂交水稻国家重点实验室,湖南长沙410125 [2]湖南浏阳永安农技站,湖南浏阳410323

出　　处：《中国水稻科学》2011年第5期501-507,共7页Chinese Journal of Rice Science

基　　金：国家科技支撑计划资助项目(2006BAD02A13);湖南省十一五农业重大专项(2006NK1001)

摘　　要：以缓释氮肥为材料,采用快速光曲线分析方法,比较研究了大田条件下6种施氮水平对超级杂交稻Y两优1号抽穗到蜡熟期剑叶叶绿素荧光动力参数的影响。结果表明,抽穗到齐穗后20d,剑叶光合电子传递速率(ETR)、有效量子产量(EQY)和光化学猝灭系数(qP)均随时间推进而提高,非光化学猝灭系数(NPQ)则呈下降趋势;同一时期,ETR、EQY、qP均表现为随施氮量增加先增后减,但最高值的施氮量均不同;不同时期,ETR和EQY均以施氮135kg/hm2时最高。综合来看,本试验条件下,施氮量以135～180kg/hm2时叶绿素荧光指标组合最优。To compare the effects of nitrogen fertilizer level on chlorophyll fluorescence characteristics in super hybrid rice flag leaves, a field fertilizer （slow release nitrogen） experiment was conducted with a super hybrid rice Y I.iang you 1 as material. The photosynthetic electron transport rate （ETR）, effective quantum yield （EQY）, photochemical quenching coefficient（q/p） , and non-photochemical quenching coefficient（NPQ） of flag leaves were measured at the heading, full heading, 10 d after full heading, 20 d after full heading. The results indicated that the ETR and EQY were increased from heading to 20 d after full heading, whereas, the NPQ decreased. During the same period, ETR, EQY, qp increased firstly and then decreased with increasing nitrogen level. The ETR and EQY at 135 kg/hm^2 nitrogen level were the highest. In conclusion, the adaptive nitrogen amount for photosynthesis were 135-180 kg/hm^2.

关 键 词：超级杂交稻 缓释氮肥 叶绿素荧光 节氮栽培 

分 类 号：S511[农业科学—作物学]