Effects of Rooting Agents on Growth and Photosynthetic Traits of Sudan Grasses  

作　　者：WANG Jin-long YANG Ming ZHENG Yan 

机构地区：[1]Department of Agronomy, Tianjin Agricultural University, Tianjin 300384, China

出　　处：《Animal Husbandry and Feed Science》2010年第6期45-48,共4页动物与饲料科学（英文版）

基　　金：supported by the Science Research Development Fund of Tianjin Agricultural University(2008D004);the National Natural Science Foundation(30900191)

摘　　要：[Objective] To investigate the effects of rooting agents on the growth and photosynthetic traits of Sudan grasses. [ Method] The responses of the growth and some photosynthetic traits of Sudan grasses to three NK II rooting agents were determined according to the randomized complete block design. [ Result] Compared to control treatment, the Sudan grass treated by NK 11-298 showed higher chlorophyll a and carotenoid contents, higher chlorophyll fluorescence parameter values （ PSII quantum efficiency： ФPSII; photochemical quenching： qP; and electron transport rate： ETR）, higher maximum photosynthetic rate （Pmax） and respiration rate （ Rd）, and the highest biomass accumulation. The chlorophyU fluorescence parameter values of Sudan grasses treated by NK 11-888 and NK 11-16 were higher than those of control treatment （ P 〈 0.05）, and other indexes had no significant difference. [ Conclusion] The rooting agents should be selected carefully according to their practice aims because of sensibility of Sudan grass to rooting agents.[Objective] To investigate the effects of rooting agents on the growth and photosynthetic traits of Sudan grasses. [ Method] The responses of the growth and some photosynthetic traits of Sudan grasses to three NK II rooting agents were determined according to the randomized complete block design. [ Result] Compared to control treatment, the Sudan grass treated by NK 11-298 showed higher chlorophyll a and carotenoid contents, higher chlorophyll fluorescence parameter values （ PSII quantum efficiency： ФPSII; photochemical quenching： qP; and electron transport rate： ETR）, higher maximum photosynthetic rate （Pmax） and respiration rate （ Rd）, and the highest biomass accumulation. The chlorophyU fluorescence parameter values of Sudan grasses treated by NK 11-888 and NK 11-16 were higher than those of control treatment （ P 〈 0.05）, and other indexes had no significant difference. [ Conclusion] The rooting agents should be selected carefully according to their practice aims because of sensibility of Sudan grass to rooting agents.

关 键 词：Sudan grasses Rooting agents CHLOROPHYLL Chlorophyll fluorescence parameter Pn-PPFD curve 

分 类 号：S511[农业科学—作物学] S544.1