摘要
为研究不同施肥水平下节水灌溉方式对超级稻光合生理的影响,通过盆栽试验研究了3种施肥水平（不施肥、低肥和高肥）和3种灌溉方式[常规灌溉（FIR）、控制灌溉（CIR）和间歇灌溉（IIR）]对＂中浙优1号＂拔节期、抽穗期和乳熟期叶片净光合速率（Pn）、胞间CO2浓度（Ci）、光合光响应曲线和光合色素含量的影响,以及光合速率与光合色素的关系。结果表明,与FIR处理相比,CIR和IIR处理提高了3个生育期＂中浙优1号＂的Pn,而Ci提高不明显;分别使拔节期、抽穗期＂中浙优1号＂的光饱和点增加9.2%~36.8%和3个生育期表观量子效率增加6.7%~31.5%,但使拔节期、抽穗期和乳熟期光补偿点降低3.2%~12.8%。与FIR相比,CIR分别增加拔节期、抽穗期和乳熟期叶绿素a、叶绿素b、类胡萝卜素和总叶绿素含量19.1%~76.3%、44.5%~98.5%、31.5%~117.4%和45.4%~145.0%;IIR处理分别提高3个生育期类胡萝卜素和总叶绿素含量4.2%~45.8%和31.5%~117.4%。不同灌溉方式下,施肥处理＂中浙优1号＂光合生理指标和光合色素含量均高于不施肥处理,高肥处理又高于低肥处理。通过＂中浙优1号＂光合速率与光合色素含量的相关分析发现,其Pn与同期光合色素含量存在显著相关性,并受到生育时期的影响。因此,CIR和IIR处理能提高＂中浙优1号＂的光合能力,提高其对强光的光合能力和弱光条件下的适应性,提高了光饱和点,进而增加光能利用率,并提高了功能叶光合色素含量,有效改善其叶片光响应特征。同时,在节水灌溉条件下,在一定范围内增施肥料均能明显提高＂中浙优1号＂的光合机能。
To investigate the effect of irrigation and fertilization on photosynthetic physiology of super rice,a pot experiment was conducted using super rice ＂Zhongzheyou 1＂ as experimental crop.The study analyzed the photosynthetic physiology parameters [net photosynthetic rate,Pn;intercellular CO2 concentration,Ci;photosynthetic light response curve and photosynthetic pigment contents of chlorophyll a（Chl a）,chlorophyll b（Chl b）,carotenoid（Car）,total chlorophyll content（TCC）] of rice under three irrigation methods [controlled irrigation（CIR）,intermittent irrigation（IIR） and flood irrigation（FIR）] and three fertilization levels [non-fertilization（F0）,low fertilization（FL） and high fertilization（FH）].It also conducted correlation analysis for Pn and chlorophyll contents.The results showed that compared with FIR,CIR and IIR treatments（saving-water irrigation methods） significantly increased Pn.It,however,failed to significantly enhance Ci at the jointing,heading and milking stages.Both CIR and IIR increased light saturation point（LSP） by 9.2%~36.8% at the jointing and heading stages and apparent quantum yield by 6.7%~31.5% respectively at the three growth stages,while they decreased light compensation point by 3.2%~12.8% at the jointing,heading and milking stages.Compared with FIR,CIR respectively increased the contents of Chl a,Chl b,Car and TCC by 19.1%~76.3%,44.5%~98.5%,31.5%~117.4% and 45.4%~145.0% at the jointing,heading and milking stages.IIR treatment respectively enhanced the contents of Car and TCC by 4.2%~45.8% and 31.5%~117.4% at the three growth stages.Under the three irrigation treatments,photosynthetic indices and photosynthetic pigment contents were higher under fertilization than non-fertilization treatments.High fertilization also resulted in higher photosynthetic indices and photosynthetic pigment content than low fertilization.Correlation analysis showed significant correlation between Pn and photosynthetic pigments contents,which correlations were infl
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2013年第4期416-425,共10页
Chinese Journal of Eco-Agriculture
基金
广西自然科学基金项目(2011GXNSFB01830)
广西研究生教育创新计划项目(2009105930901D011)资助
关键词
灌溉方式
施肥水平
光合光响应
光合色素
超级稻
Irrigation method
Fertilization dose
Photosynthetic light response
Photosynthetic pigment
Super rice
