GREENHOUSE MICROCLIMATE AS INFLUENCED BY POLY FILM COVERS AND ITS EFFECT ON GROWTH OF ROSE CUT FLOWER (ROSA HYBRIDA SPP.) CULTIVARS

G. Oloo-Abucheli, J.N. Aguyoh , L. Gaoquiong
Greenhouse covering diffuses light that reaches the plant canopy. The diffused light has been found to be advantageous since it prevents shadow formation and enhances light penetration. A myriad of greenhouse covering material have been developed for this purpose. However, spectrum properties and their effect on plant growth are continuously being discovered under different conditions. A field study was conducted in 2012/2013 in a growth tunnel to investigate the effect of UV-A 205/N, UV-A milky white and IR-504 poly films on growth of two rose cultivars under natural conditions. The research was carried out under a split plot experiment laid down in a completely randomized block design. The covers exhibited differences in microclimate (greenhouse air temperature, relative humidity and photo synthetically active radiation). The amount of PAR recorded was high under UV-A milky white poly film compared to the coloured IR-504 and UV-A 205/N. Long grades of rose cut flower were obtained under UV-A 205/N cover which received low PAR compared to those grown under UV-A milky white and IR-504. UV-A 205/N had high dry matter accumulation for both stem and flower heads. Dry matter accumulations of plants grown under UV-A clear and IR-504 were not significantly different. Temperature and relative humidity varied significantly (P<0.05) under different poly films, these differences had implication on the stem length of rose cut flower. It is evident from the study that UV-A 205/N and IR-504 poly film enhanced production of longer rose cut flower stems compared to UV-A milky white.
Oloo-Abucheli, G., Aguyoh , J.N. and Gaoquiong, L. (2015). GREENHOUSE MICROCLIMATE AS INFLUENCED BY POLY FILM COVERS AND ITS EFFECT ON GROWTH OF ROSE CUT FLOWER (ROSA HYBRIDA SPP.) CULTIVARS. Acta Hortic. 1077, 23-34
DOI: 10.17660/ActaHortic.2015.1077.2
https://doi.org/10.17660/ActaHortic.2015.1077.2
spectrum properties, dry matter accumulation, microclimate, rose stem length
English

Acta Horticulturae