Data/hora: 06/06/2024 11:05:02

Biblioteca(s): | Embrapa Meio Norte / UEP-Parnaíba.
Data corrente: | 01/04/1993
Data da última atualização: | 01/04/1993
Autoria: | WHITE, J. W.; POLYS, S. M.
Título: | Photon flux and leaf temperature effects on flower initiation and early development of red elite geraniums.
Ano de publicação: | 1987
Fonte/Imprenta: | Journal American Society Horticultural Science, v.112, n.6, p.945-950,1987.
Idioma: | Inglês
Conteúdo: | Geranium (Pelargonium x hortorum Bailery  "Red Elite") seedlings were grown with five daily mean temperature (DMT) and daily light integral (DLI) treatment combinations: DMT of 23 graus C? day at DLI of 8.64 mol-1m-2 (TI0, DMT o f 25 graus at 8.64 mol (T20), DMT of 23 graus at DLI of 17.28 mol, (T3) DMT of 25 graus at DLI 17.28 mol (T4), and DMT of21 graus at 17.28 mol (C1). Using infrared thermometry to control, leaf temperature, DMT had a greater influence on flower initiation at thetransition stage and on flower bud development to macrobud stage than DLI. Seedlings in T4  reached  transition stage 24 days after sowing with a cumulative irradiance of 415 mol. Transition occurred in T1 at 27 days from sowing . With a cumulative irradiance of only 23 mol. Some time after 27 days from sowing, transition occurred in T2, T3, and C1. With a DLI of 17.28 mol, a DMT reduction from  25 graus to 21 graus effected macrobuds in 42,56, or 62 days after sowing, respectively; whereas with a DLI of 8.64 mol, a decrease from 25 graus to 23 grauseffected macrobuds in 54 or 51 days.
Palavras-Chave: | Flower induction; Fotosintetic radiation; Inducao de floracao; Leaf temperature; Radiacao fotossintetica; Temperatura foliar; Termometria; Thermometry.
Thesagro: | Gerânio.
Categoria do assunto: | --
Registro original: | Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)
Exemplares: | CPAMN-UEPP - (2396-1) - ADD - SP - -- -  -  - 1991.04075 - DIS