Crescimento e produção de gérbera fertirrigada com solução nutritiva

Abstract

Growth and production of gerbera fertigated with nutrient solutionThis work aimed to evaluate growth and production characteristics of four potted gerbera cultivars fertigated with two nutrient solutions. The experiment was carried out in a greenhouse from May to July 2006 at UNESP, Botucatu, São Paulo State, Brazil. Experimental design was in randomized blocks in a 4x2 factorial arrangement, with 4 gerbera cultivars (Cherry, Golden Yellow, Salmon Rose and Orange) and 2 nutrient solutions. The plants were cultivated in 1.3L pots filled with substrate composed of 70% fine pinus bark and 30% subsoil earth. Leaf number and plant diameter were weekly evaluated throughout the culture cycle; leaf area and dry phytomass at the end of vegetative and reproductive periods; and time needed for production, inflorescence number, inflorescence diameter, and plant stem and height at commercialization point. The cultivars presented different responses to growth characteristics: Salmon Rose and Cherry presented higher shoot formation; Golden Yellow and Orange were more compact. At commercialization point, only height, inflorescence diameter and stem varied among cultivars. Both nutrient solutions were effective to produce high-quality plants.

Doses de fósforo e uso de esterco bovino no cultivo de gérbera de vaso

“…Thus, considering these classification parameters, the gerbera plants of all treatments in the experiment had a quality standard for commercialization in class II. Ludwig et al (2010) found in potted gerbera cultivars fertigated with nutrient solutions that the shoot and inflorescence diameter ranged, respectively, from 31.4 to 35 cm, and from 8.8 to 9.3 cm, and that the plants had, on average, 2.8 inflorescences per pot. Guerrero et al (2013) obtained potted gerbera plants (cultivar Red) with 27.2 cm of mean shoot diameter, with 8.6 cm mean inflorescence diameter, and, on average, 2.9 inflorescences per pot, in an experiment using substrate and nutrient solution.…”

“…72 days after transplanting, at the gerbera marketing time, defi ned according to Guerrero et al (2013), the following parameters were evaluated: largest shoot diameter of the plants, measured with the aid of a tape measure at two points perpendicular to the end of opposite leaves; number of stems; stem length; infl orescence diameter and stem weight, according to the procedures described in Ludwig et al (2010) and Muniz et al (2013). Subsequently, a fully expanded leaf was collected from each pot, according to Tombolato et al (1997); they were washed, dried in a forced air oven at about 60 °C, and milled to determine P contents in the leaf tissue (TEDESCO et al, 1995).…”

“…In the cultivation of potted gerbera, it is important to look for a high number of flower stems; inflorescences with large diameter; small size; and adequate leaf branching, to form a balanced set between the vegetative and reproductive part (LUDWIG et al, 2010). …”

“…In addition, in Brazil, it is common for farmers to manage fertilization empirically, supplying large amounts of nutrients, which are often not required by plants, without following agronomic criteria (LUDWIG et al, 2010;GUERRERO et al, 2013).…”

Growth Analysis of Potted Gerbera Conducted With Mineral Fertilization and Organic Fertigation

“…Despite its expanding commercial production, research has not kept pace, with little information on cultivation, especially with regard to nutrition and fertilization (Ludwig et al, 2010a). As a result, fertilizers used by farmers are derived from companies' techniques empirical observations (Ludwig et al, 2010b;Muniz et al, 2013). Pesticide use has increased due to high pest incidence in culture (Cardoso and Silva, 2013).…”