Productivity in seeds of the green bean produced under conventional and organic systems

Abstract

Two experiments were carried out during 2016 at the Anápolis Experimental Station of EMATER in the State of Goiás, with the aim of studying the yield of seeds of 18 strains and two indeterminate cultivars of the green bean, one experiment under a conventional system and the other under an organic system. A randomized block experimental design was used, with twenty treatments and three replications, to evaluate the mean number of seeds per pod (NSP), 100-seed weight (100SW) and productivity (PROD). Under the conventional system, the 100SW ranged from 19.3 to 25.0 grams. The highest productivity was achieved with the UEG 0212, UEG 0212, UEG 0712 and UEG 3014 strains, which were superior to the other strains, including the controls. Under the organic system, there was a range of 6.66 to 8.33 for the NSP, while for the 100SW, the range was from 23 to 32 grams. The UEG 0212, UEG 1012, UEG 2014 and UEG 3014 strains, all with cylindrical pods and white seeds, can be used as alternatives for planting, being superior to the 'Favorito' cultivar and equal to the 'Macarrão Bragança' cultivar, whereas UEG 1112 and UEG 0714, with cylindrical pods and cream-colored seeds, can be used as dual-adapted cultivars, with green pods and dry grain that can be used as end-of-cycle pods if there are defects that are not accepted by the market.

Seed production of bush snap beans genotypes in conventional and organic systems

“…Higher yield values found in the conventional cultivation system are in agreement with Brunner et al (2014), who found, in na organic system in Puerto Rico, Panama, yields of marketable pods superior to those found in conventional system. They also agree with Portal et al (2018), who, studying genotypes of wild bean of indeterminate growth, in the same place, also found better yield performance in organic production system.…”

Bush Snap Bean Genotypes Under Conventional and Organic Cultivation

“…In this sense, Néri et al (2020) evaluated, in Anápolis, regarding seed production, 20 bush snap bean genotypes in conventional and organic systems, with most genotypes being more productive in the organic system. Portal et al (2018), studying 20 bean genotypes of indeterminate growth, in the same location, of both systems, also obtained better productive performance in the organic system.…”

“…Diabrotica speciosa and Bemisia tabaci were controlled by spraying with Neem oil associated with biofertilizer, according to the recommendations of the manufacturer. The variables studied in both experiments were: 1) yield of green pods (at the stage considered suitable for commercialization), obtained by the sum of the mass of three harvests in each plot, expressed in tons per hectare; 2) average mass of pods, obtained by the division of the total mass of pods by the total number of pods in each plot, expressed in grams; 3) number of pods per plant, obtained by the division of the total number of pods by the number of plants in the plot; and 4) plant vigor, evaluated in the flowering phase, using a scale of notes from 1 to 5, where 1 is low vigor, and 5 is high vigor (Portal et al, 2018). Data were subjected to analysis of variance for each experiment, followed by the joint analysis.…”