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São João del Rei, Brazil

Lessa M.A.,Nucleo Tecnologico Epamig Floricultura | Schuch U.K.,University of Arizona | Paiva P.D.O.,Federal University of Lavras | Paglis C.M.,Federal University of Lavras | And 3 more authors.
Acta Horticulturae | Year: 2013

Calandiva® is an ornamental species that is gaining prominence in the market of potted flowers due to the attractiveness of its inflorescences. Since it has been cultivated recently, some aspects of its development are still unknown. The objective of this study was to verify a mathematical procedure that allows to describe the formation and development of Calandiva® leaves associated with the growing degree-days accumulation (GDD). Two experiments were conducted using cuttings of Kalanchoe blossfeldiana 'Bisset' (Calandiva® Pink) and K. blossfeldiana 'Latin Lover Rio' (Calandiva® Orange), planted and grown in plastic pots containing substrate and submitted to fertigation. The experimental design was complete randomized block with four replicates. Each useful plot consisted of three plants, totaling twelve plants per assessment. Every fourteen days, during 105 days, the leaf area was determined with the aid of a leaf area meter. Seven destructive assessments were performed in each experiment. Two models were developed describing the relationship between leaf growth and GDD accumulation in Calandiva®. Growth data obtained of the 'Bisset' cultivar were used to develop these models and the validation was performed using data of the 'Latin Lover Rio' cultivar. The models have been validated and are acceptable for use to correlate of leaf area and number of leaves with growing degree-day in Calandiva® plants. Source


Almeida E.F.A.,Nucleo Tecnologico Epamig Floricultura | Lessa M.A.,Nucleo Tecnologico Epamig Floricultura | Curvelo I.C.S.,Nucleo Tecnologico Epamig Floricultura | Taques T.C.,Nucleo Tecnologico Epamig Floricultura | And 4 more authors.
Acta Horticulturae | Year: 2013

An Integrated Production System consists of exploring land for the production of food and other high-quality products through the use of natural resources and regulatory mechanisms to minimize the use of polluting inputs, thus ensuring sustainability. The aim of this study was to evaluate the production of 'Carolla' rose, grown under different soil management systems in Integrated Production System. 'Carolla' rose graftings were grown in soil in a greenhouse. The experimental design was randomized complete block in split plot arrangement in space, with eight treatments and four replicates. The treatments consisted of four percentages (25, 50, 75 and 100%) of chemical fertilizer, based on recommended rose fertilization for the state of Minas Gerais, Brazil, versus presence and absence of green manure (Calopogonium mucunoides) grown intercropped with the rosebush. Treatments that did not receive 100% of chemical fertilizer have been incremented with two types of bio-fertilizers monthly applied: Bokashi (16 g/plant in the soil) and Supermagro (5% in foliar application). The assessments were conducted three times a week during one year. The crop management was carried out in accordance with the rules of integrated production. It was observed that in the presence of green manure, the number of stems produced per plant (7.16), leaf dry weight (4.55 g) and total dry weight (12.06 g) were lower when compared with plants grown without green manure (7.98, 5.01 and 12.90 g, respectively). For the other parameters evaluated (stem length and flower bud length, stem base diameter and flower bud diameter, stem and flower bud dry weight), no significant differences were observed. In the first year of evaluation, it was found that it is possible to produce high-quality roses using smaller percentages of mineral fertilizers, since the production and quality of plants were similar even with reduced fertilization. Source


Lessa M.A.,Nucleo Tecnologico Epamig Floricultura | Almeida E.F.A.,Nucleo Tecnologico Epamig Floricultura | Reis S.N.,Nucleo Tecnologico Epamig Floricultura | Barbosa S.S.,Nucleo Tecnologico Epamig Floricultura | And 2 more authors.
Acta Horticulturae | Year: 2013

Efficiency in the production process of cut flowers is essential to increase the post-harvest durability. The fertilizer management can influence the vase life of cut flowers. In this context, this study aimed to evaluate the post-harvest durability of roses grown in four chemical fertilizer percentages (25, 50, 75 and 100%) versus presence and absence of green manure (Calopogonium mucunoides) intercropped with the rose bush. The experiment was conducted in the laboratory of plant science of the Epamig Floriculture Technology Center of São João del Rei, Minas Gerais (Brazil). Flower stalks of 'Carolla' rose were harvested, conditioned in plastic containers with distilled water and kept at room temperature (22 to 25°C). The experimental design was completely randomized with eight treatments, four replicates and three flower stalks per plot. The assessments were performed every two days. It was observed that the flower stalks grown intercropped with green manure had higher fresh weight loss (6.47 g) compared with flower stalks grown without green manure (4.21 g). No significant difference between flower stalks grown under different treatments for variable vase life was observed. The flower stalks showed excellent quality, and the opening of petals was verified by the increased diameter of the flower bud. On the first day of evaluation, the buds had an average diameter of 29.82 mm, showing a diameter of 66.78 mm in the final evaluation. Intercropping rose bush with green manure (Calopogonio muconoides) adversely affected the post-harvest quality of roses, forming less turgid flower stalks. Source


Carvalho L.M.,Nucleo Tecnologico Epamig Floricultura | Almeida E.F.A.,Nucleo Tecnologico Epamig Floricultura | Almeida K.,Nucleo Tecnologico Epamig Floricultura | Lessa M.A.,Nucleo Tecnologico Epamig Floricultura | And 4 more authors.
Acta Horticulturae | Year: 2013

This study aimed to evaluate the influence of soil management on the occurrence of pests and natural enemies in the rose cultivation under Integrated Production System. The experiment was carried out at the Agricultural Research Enterprise of the State of Minas Gerais, in São João del Rei-MG, Brazil. 'Carolla' rose graftings were used. The experimental design was in randomized blocks with 8 treatments composed of 4 chemical fertilization percentages (25, 50, 75 and 100%) versus presence and absence of combination with green manure (Calopogonium mucunoides) and four replications each. Samplings of phytophagous arthropods and natural enemies were carried out weekly, from February to November 2010. The occurrence of mites, aphids, whitefly, beetles, parasitoids and predators was observed. In the area with presence of green manure, lower number of aphids (3.9±0.58 aphids/leaflet) and mites (1.2±0.44 mites/leaflet) was observed, when compared to area without green manure (6.7±0.56 aphids/leaflet and 2.4± 0.69 mites/leaflet). In all treatments, high-quality flower stalks with long stems (average length of 50-100 cm) were obtained. It was concluded that the soil management directly influences the occurrence of pests and natural enemies in the rose cultivation in integrated production system. Source

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