title: Growth and flowering responses of cut chrysanthemum grown under restricted root volume to irrigation frequency.
abstract: Influences of irrigation frequency on the growth and flowering of chrysanthemum grown under restricted root volume were tested. Chrysanthemum cuttings (Chrysanthemum morifolium "Reagan White") were grown in seedling tray which contained coconut peat in volumes of 73 and 140 cm(3). Plants were irrigated with drip irrigation at irrigation frequencies of 4 (266 mL), 6 (400 mL), and 8 (533 mL) times/day to observe their growth and flowering performances. There was interaction between irrigation frequency and substrate volume on plant height of chrysanthemum. Plants grown in 140 cm(3) substrates and irrigated 6 times/day produced the tallest plant of 109.25 cm. Plants irrigated 6 and 8 times/day had significantly higher level of phosphorus content in their leaves than those plants irrigated 4 times/day. The total leaf area, number of internodes, leaf length, and leaf width of chrysanthemums grown in 140 cm(3) substrate were significantly higher than those grown in 73 cm(3) substrate. The numbers of flowers were affected by both irrigation frequencies and substrate volumes. Chrysanthemums irrigated 8 times/day had an average of 19.56 flowers while those irrigated 4 times/day had an average of 16.63 flowers. Increasing irrigation frequency can improve the growth and flowering of chrysanthemums in small substrate volumes.
authors.affiliation: Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: Viyachai
authors.initials: V
authors.lastname: Taweesak
authors.affiliation: Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: Thohirah
authors.initials: T
authors.lastname: Lee Abdullah
authors.affiliation: Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: Siti Aishah
authors.initials: SA
authors.lastname: Hassan
authors.affiliation: Department of Agribusiness and Information System, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: Nitty Hirawaty
authors.initials: NH
authors.lastname: Kamarulzaman
authors.affiliation: Agro Technology Park, MARDI Cameron Highlands, Tanah Rata, 39007 Pahang, Malaysia.
authors.forename: Wan Abdullah
authors.initials: WA
authors.lastname: Wan Yusoff
mesh_terms: D057914:Agricultural Irrigation; D031202:Chrysanthemum / Q000254:growth & development*; D003059:Cocos / Q000737:chemistry; D035264:Flowers / Q000254:growth & development*; D018515:Plant Leaves / Q000254:growth & development*; D018517:Plant Roots