Vol. 79 No: 4

Title:
Growth and flowering responses of Canna x generalis to nitrogen supplied to the growing medium via top- or sub-irrigation

Authors:
D. M. YEH, P. H. HSU and J. G. ATHERTON

pp: 511-514

Abstract:
Effects of nitrogen concentration on growth and flowering were studied in Canna × generalis L. H. Bailey ´Tropical Rose` and ´Tropical Red` grown with irrigation supplied either to the top (top-irrigation) or the bottom surface (subirrigation) of the growing medium. For ´Tropical Rose`, maximum total dry weights occurred at 4 mM N for both irrigation methods, but growth was greater with subirrigation compared to top-irrigation. For ´Tropical Red`, maximum total dry weight occurred at 4 mM N under subirrigation, and 8 mM N under top-irrigation. Growth was reduced in all treatments when growing media EC exceeded 1.25 dS m-1. Shoot dry weight increased as leaf N content increased from 0.6&percent; to 1.4 &percent;. Plants under top-irrigation took longer to flower than did those under subirrigation. At 4 to 32 mM N, regardless of irrigation method, plants flowered after 9-10 leaves had been formed. Plants grown at 0 mM N did not flower after treatment for 145 d. Maximum spike length and floret number were observed at 4 mM N in both irrigation treatments.

Full text: JHSB Subscribers     ISHS members & other users
(PDF 202683 bytes)

Translate:

Go back to previous page