บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Production fertilizer and postharvest light intensity effects on begonias.

Conover, C. A.; Satterthwaite, L. N.; Steinkamp, K. G.;

Proceedings of the Florida State Horticultural Society Year: 1993, publ. 1994 Vol: 106 Pages: 299-302 Ref: 11 ref.

1994

บทคัดย่อ

Production fertilizer and postharvest light intensity effects on begonias.

ABSTRACT :

 

Plug-raised plantlets of Begonia x semperflorens-cultorum cultivars Prelude Scarlet and Vodka were transferred to 10-cm-diameter pots containing a commercial compost and placed in a glasshouse on 11 Jan. Top-dressings of 14N-6.2P-11.6K Osmocote fertilizer at 1.0, 1.5, 2.0 or 2.5 g/pot were applied on 15 Jan. The average maximum light intensity under glass was 760 micro mol m-2 s-1 throughout the production stage. When plants reached saleable size on 23 Feb. they were assessed for growth and flowering before being transferred to interior rooms where all conditions were constant with the exception of light intensity; cool white fluorescent lamps provided 12, 24, 36 or 48 micro mol m-2 s-1 for 12 h daily. Plants remained in the test rooms for 9 weeks and were assessed again at intervals. In the glasshouse the plant grade (on a 1-5 scale ranging from dead to excellent quality) decreased as the fertilizer application rate (FR) increased. With Prelude Scarlet the number of flower stalks/plant also dec

reased with increasing FR, whereas with Vodka the number was lower at FR rates of 1.5 and 2.0 g/pot than at the lowest and highest rates. Under room conditions the plant grade and the number of flower stalks/plant for both cultivars generally decreased with increasing FR and increased with greater light intensity.