title: [Effects of different irrigation minima on green period and cold-resistance physiological indices of Festuca arundinacea].
abstract: A pot experiment was conducted to study the effects of different irrigation minima [80% field capacity (FC), 70% FC, 60% FC and 50% FC] from late autumn to early winter on the green period and cold-resistance of Festuca arundinacea. Under the low temperature in winter, treatments 80% FC and 70% FC made the leaf relative water content, POD, CAT, and SOD activities, and chlorophyll, soluble sugar, and free proline contents of F. arundinacea maintained at a higher level, but made the MDA content and electrolyte leakage decreased, resulting in an increased cold-resistance of F. arundinacea. Treatment 80% FC made the green period of F. arundinacea prolonged by 4, 22 and 28 days, as compared with treatments 70% FC, 60% FC, and 50% FC, respectively, and made F. arundinacea have the shortest time to wither in winter and to turn green in spring, with the longest green period. Taking water-saving and water use efficiency into consideration, 70% FC would be the optimum irrigation low limit from late autumn to early winter for F. arundinacea.
authors.affiliation: College of Resource and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China. liulj2014@Yahoo.cn
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Liu
authors.forename: Wei-Feng
authors.initials: WF
authors.lastname: Chen
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.forename: Cheng-Xiang
authors.initials: CX
authors.lastname: Zhang
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D057914:Agricultural Irrigation / Q000379:methods*; D003080:Cold Temperature; D031751:Festuca / Q000254:growth & development / Q000502:physiology*; D013482:Superoxide Dismutase / Q000378:metabolism; D014867:Water / Q000502:physiology*
chemical_list: D014867:Water; D013482:Superoxide Dismutase