Abstract
Phenology and phyllochron are parameters that help in characterizing vegetal growth and development. This study is an evaluation of the performance of the vernalized and non-vernalized Albion strawberry cultivar in relation to phenology and phyllochron in substrate. The experiments were developed in the greenhouse of the Horticulture Sector of the Universidade de Passo Fundo, Rio Grande do Sul State. The plants were placed in bags spread over wooden benches and filled with substrate formed by carbonized rice hulls and Mec Plant Horta 2 ® . The experimental design used for both experiments was randomized blocks with 4 repetitions and 8 plants per parcel. In each parcel, 4 plants were randomly marked and evaluated for phenology and phyllochron. For phenology, the dates of onset of flowering and fruiting and the beginning and the end of the harvest were registered. For phyllochron, a weekly count of the number of leaves was performed. A linear regression of the number of leaves (NL) in the main corona and the accumulated thermal time (Att) was performed. Vernalization predicts the cycle of the Albion cultivar, the leaf appearance rate and the phyllochron when compared to those without vernalization.
Highlights
The price variation of commercial strawberries in natura is noticeable
Antunes et al (2006) determined strawberry phenology based on Oso grande, Tudla, Chandler and Dover cultivars in Passo Fundo, Brazil
Dover had the fastest onset of flowering and fruiting (ANTUNES et al, 2006). Another parameter in the vegetative development of cultures is the estimation of leaf appearance rate (LAR) and of the phyllochron, which is important for the calculation of number of accumulated leaves in the plant’s main stem (STRECK et al, 2005, 2007; XUE et al, 2004)
Summary
The price variation of commercial strawberries in natura is noticeable. The better products are obtained between April and June, when the supply is reduced due to climactic conditions and features of the cultivars explored. Antunes et al (2006) determined strawberry phenology based on Oso grande, Tudla, Chandler and Dover cultivars in Passo Fundo, Brazil. Dover had the fastest onset of flowering and fruiting (ANTUNES et al, 2006) Another parameter in the vegetative development of cultures is the estimation of leaf appearance rate (LAR) and of the phyllochron (necessary time for the appearance of successive leaves), which is important for the calculation of number of accumulated leaves in the plant’s main stem (STRECK et al, 2005, 2007; XUE et al, 2004). This study provides an evaluation of phenology as well as an estimation of leaf appearance rate and the phyllochron in fresh and vernalized strawberry seedlings (frigo) cultivated in substrate
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