中国水稻科学Issue(2)：150-158,9.
膜下滴灌和淹灌两种栽培模式下水稻光合生理特性的研究
Photosynthetic Characteristics of Rice Under Drip Irrigation with Plastic Film Mulching and Continuous Flooding
摘要
Abstract
Photosynthetic pigments contents,photosynthetic characteristics,chlorophyll fluorescence parameters, osmolytes,and water use efficiency(WUE)and yield factors at milky stage of two rice lines T-04 and T-43 (Oryza sativa subsp.keng )were analyzed under traditional continuous flooding and drip irrigation with plastic film mulching in a pot experiment.The results showed that the WUE of rice under drip irrigation with plastic film mulching were higher than that under traditional flooding,but chlorophyll a,chlorophyll b and carotenoids contents were significantly reduced compared with those under traditional continuous flooding.The maximum leaf net photosynthetic rate,relatively high intercellular CO 2 concentration (C i ) and an equivalent stomatal conductance (G S ),transpiration rate (T r ) were significantly lower than those under continuous flooding,indicating that the reduced photosynthetic rate was attributed to both chlorophyll contents and stoma.Apparent quantum efficiency(AQY),carboxylation efficiency(CE),ΦPS Ⅱ , electron transport rate (ETR)and F v/F m decreased significantly (P <0.05).Lower photosynthetic pigments contents might be the main factor to low leaf photosynthetic rate which directly leads to 1ower light-harvesting capacity and photochemical conversion efficiencies of the PS Ⅱ reaction center.The contents of soluble sugars (SS)and soluble proteins(SP)were lower,but both proline (Pro)and malondialdehyde(MDA)contents were higher than those under continuous flooding cultivation,implicating that drip irrigation with plastic film mulching resulted in membrane lipid peroxidation,and cell membrane damage to some degree,but activated osmolytes accumulation thus enhanced its drought tolerance.Effective panicle number per unit area and seed setting rate under drip irrigation with plastic film mulching were significantly reduced,leading to a declined seed production.关键词
膜下滴灌/传统淹灌/光合特性/渗透调节/水稻Key words
drip irrigation/plastic film mulching/flooding cultivation/photosynthetic characteristics/osmorgulation/rice分类
农业科技引用本文复制引用
王志军,谢宗铭,田又升,陈林,董永梅,李有忠,吕昭智..膜下滴灌和淹灌两种栽培模式下水稻光合生理特性的研究[J].中国水稻科学,2015,(2):150-158,9.基金项目
国家高技术研究发展计划资助项目(2011AA100508) （2011AA100508）
