Produção de frutos de morango em função de diferentes períodos de vernalização das mudas

Abstract

Production of strawberry fruits depending on vernalization periods of the transplantsThe yield of strawberry fruits cv. Camarosa was evaluated as affected by different vernalization periods of the transplant, in comparison with imported ones. The experiment was carried out in Pelotas, Rio Grande do Sul State, Brazil, using a tunnel as production system. The plants were transplanted on May18, 2006, using transplants produced in the south of Rio Grande do Sul, which were vernalized during 0; 7; 14; 21 and 28 days (4±1 o C, 94±2% RH), and transplants without vernalization coming from Chile. The treatments were disposed according to a randomized complete block design with four replications. The experimental unit were composed of 21 plants. The yield, number of fruits per plant and average fruit mass were analyzed during 20 weeks (August to December). The Chilean transplants provided greater production and number of fruits than transplants produced in Rio Grande do Sul (1,038.3 and 491.7 g plant -1 ; 55.1 and 34.3 fruits plant -1 , respectively). The vernalization of the national transplants during approximately 24 days optimized the yield and number of fruits significantly (1,023.1 g plant -1 ; 55.6 fruits plant -1 ). Transplants produced in Rio Grande do Sul presented higher production in November and December, while Chilean ones in October and November.

Postharvest quality of strawberry produced during two consecutive seasons

“…One of the recent techniques used by strawberry growers is the biennial crop replanting, in which plants are maintained in the field for two consecutive cycles, allowing two crops with the same plants at Season 1 (January, February and March) and Season 2 (August, September and October), which reduces cost, because plantlets are one of the main costs of strawberry production (Oliveira & Scivittaro, 2009).…”

Diodos emissores de luz e concentrações de BAP na multiplicação in vitro de morangueiro

“…Técnicas de micropropagação têm se mostrado alternativas viáveis para a produção massal de plantas, sendo o morangueiro uma das principais espécies trabalhadas no Brasil e no exterior (OLIVEIRA & SCIVITTARO, 2009). Entre os reguladores vegetais utilizados na multiplicação in vitro de morangueiro, a 6-benzilaminopurina (BAP) tem sido a de maior uso comercial (BRAHM & OLIVEIRA, 2004).…”

Base temperature for leaf appearance and phyllochron of selected strawberry cultivars in a subtropical environment

“…In strawberry (Fragaria x ananassa), the development and growth of leaves, inflorescences and stolons are controlled by complex interactions among environmental variables mainly temperature, photoperiod and daily thermal amplitude (Heide and Sonsteby, 2007;Oliveira and Scivittaro, 2009;Bradford, 2010). A main variable that has been used to describe leaf development of agricultural crops is the number of accumulated leaves (LN) on the main stem (Streck et al, 2003a).…”