Desempenho de híbridos de couve-flor de verão em Jaboticabal

Abstract

A produção de hortaliças pode gerar retornos econômicos e terapêuticos, porém, exige um intenso envolvimento de capital, trabalho qualificado e conhecimentos. É uma atividade que integra o agronegócio e envolve diversos setores da cadeia produtiva, devendo-se produzir com preços competitivos, alta qualidade e constância (Fontes, 2005).No estado de São Paulo, a couveflor está entre as quinze hortaliças mais produzidas (May et al., 2007), portanto, o seu valor econômico é bastante expressivo. Essa olerícola tem grande importância, particularmente, para os agricultores familiares que, em geral, cultivam pequenas áreas ao longo do ano. Nesse caso, o fato de ser bastante exigente em mão-de-obra, principalmente, na fase de colheita, não se constitui embaraço, ABSTRACTPerformance of hybrids of cauliflower for summer season, in Jaboticabal, BrazilThe experiment was installed in field and aimed to compare the performance of eight hybrids of summer cauliflower. The statistical design was the randomized blocks with eight treatments and four replicates. The experimental plot measured 14 m², with 28 plants of cauliflower spacing 1.0 m between rows and 0.5 m between plants. It was considered for evaluation 10 plants of the two central rows of each plot and the following hybrids of cauliflower: TPX00123, TPC00218, Sarah AF-1169, Sharon, Snow-Flake, First-Snow, Veneza and Verona. Top-dressing was carried out with 10,5 kg of ammonium sulfate and 2,8 kg of potassium chloride, applied at 15, 30, 45 and 60 days after the seedlings transplantation. The cauliflowers were harvested at the ideal moment, with compact heads and united flower buds. The hybrids TPC00218 and TPX00123 were promising, with commercial productivity of 23.8 and 23.2 t ha -1 , respectively. The hybrid First-Snow presented low plant development and good productivity, so it can be cultivated with smaller spacing among plants. The hybrid Snow-Flake presented the lowest productivity, so it is not recommended for the region of Jaboticabal. All tested hybrids had its production classified as "extra" and class 8 (greater than 230 mm). sendo considerada uma cultura lucrativa (May et al., 2007). A couve-flor é uma planta exigente em relação às condições climáticas, sendo originária de regiões de clima temperado ameno e bienal. Devido a essa exigência em baixa temperatura, seu cultivo era restrito a regiões de temperaturas mais amenas (Blanco et al., 1997). Mais recentemente, através do melhoramento genético houve desenvolvimento de híbridos de couve-flor que podem ser cultivados em condições de clima mais quente, permitindo a produção durante todo o ano (Filgueira, 2003). Entretanto, a sensibilidade das cultivares à temperatura é bastante variável. Desse modo, estudos relacionados a tolerância das novas cultivares às condições das diferentes regiões, são importantes sob pena do olericultor não obter colheita ou produto adequado às necessidades do mercado.O plantio de cultivares de inverno em condições de alta temperatura pode ocasionar o não florescimento da planta, ou c...

Irrigation management influence and fertilizer doses with boron on productive performance of cauliflower

“…Prolonged periods of temperature above 25 °C may also delay the formation of the cauliflower plants inflorescence (MONTEIRO et al, 2010). These authors also observed, so this study, precocity difference in a summer hybrid, where it has reached the point of harvest at 119 days after sowing, differently from MORAIS JÚNIOR et al (2012) and ZANUZO et al (2013), for the same hybrid they obtained a short period between sowing and harvesting -112 days and 105 days, respectively.…”

“…MORAIS JÚNIOR et al (2012) using drip irrigation system only reported that irrigations were made throughout the crop cycle in three-day intervals, complementing the rains. The same happened with MONTEIRO et al (2010), but they used a sprinkler system to irrigate. As can be seen, there is a lack of irrigation techniques information for the cauliflower.…”

Research on the Effect of Diferential Organic Fertilization of Cauliflower Hybrids Grown in Open Field

“…Inflorescence mass increased with fertilizers doses. The mass in this experiment was similar to that (1,120 g) reported by Monteiro et al (2010) in work with Verona cultivar in an autumn experiment for the observation of cauliflower hybrids. The value obtained in this experiment where, however, larger than that reported by Pôrto et al (2012) (860 g) in an experiment in which the plants were cultivated at the same population density.…”

Cauliflower quality and yield under tropical conditions are influenced by boron fertilization

“…Curd diameter (CD) is an important factor to be evaluated in cauliflower so this parameter is used by marketplace to quality factor. It was observed that Sharon genotype presented high CD (20.75 cm) between other genotypes (Table 1), however the value obtained was lower than Monteiro et al (2010) and Massaroto et al (2008) study that obtained values of 26.37 and 25.25 cm, respectively. These differences can be related to temperature as well as spacing, so that, temperature is able to changing plant development, bud development, shape and curd quality, yield and cycle time (Trevisan et al, 2003).…”

“…Therefore, Monteiro et al (2010) reported to Sharon and Sarah cycle of 119 and 108 days, respectively when grown in temperatures of 22°C.…”