Studies have indicated that grafting increases yield and prevents plant diseases. An experiment was installed to evaluate the influence of rootstock on the physicochemical and phytotechnical characteristics of a cherry tomato cultivar (Sweet Grape) under organic, greenhouse production system, from July to December 2014. The experiment consisted of a randomized complete block design, with eight replications. Treatments were composed of four rootstocks (Emperador, Muralha, Enforce, and Enpower) and the ungrafted cultivar Sweet Grape (control). The following variables were analyzed: plant height, yield, firmness, discard, yield/discard ratio, total titratable acidity (TTA), total soluble solids (TSS), ratio, pH, number of clusters, and number of leaves. Data were subject to analysis of variance by the F test, at 5% significance level, and means were compared by the Tukey’s test. Plant height was significantly different among treatments. Rootstocks presented no significant differences on yield, number of clusters, and TTA. The rootstocks Emperador, Enforce, and Muralha presented significant difference when compared to the control. For number of leaves, all rootstocks were significant when compared to the control, but not in relation to each other. The rootstocks presented the following yields: Emperador = 66.57 t ha-1; Muralha = 59.79 t ha-1; Enpower = 58.44 t ha-1; Enforce = 57.92 t ha-1; and the control cv. Sweet Grape = 51.28 t ha-1. Results revealed that rootstocks have the potential to improve cherry tomato’s yield in an organic cultivation system and do not interfere negatively with the physicochemical quality of the final product.
Local maize (Zea mays L.) varieties are cultivated by small-scale farmers in western Santa Catarina (SC) State, in southern Brazil. These small areas frequently present many problems related to biotic and non-biotic stresses, which have limited the economic output and income of the farmers. Production from local varieties for human consumption would be an alternative way of improving income and stimulating on farm conservation. The genetic variability of the total carotenoid content (TCC) of kernels in a local maize population was evaluated for their economic exploitation potential as biofortified food. Two independent samples of 96 half-sib families (HSF) plus four checks were evaluated in two groups of experiments in western SC and each one was carried out in two environments. They were set out in a 10 × 10 partially balanced lattice with three replications per location; plots consisted of one row, 5.0 m long with 1.0 m between rows. TCC ranged from 11 to 23 µg g -1 , averaging ≈16 µg g -1 in the pooled analysis over the two sets. The local composite population exhibited genetic variability in order to increase the TCC of grains in the second cycle of selection by the convergent-divergent scheme.
enxertos e níveis de adubação orgânica em tomateiro tipo cereja, sob ambiente protegido, cultivado em sistema orgânico. / Vanessa Stainbach Albino; orientador José Ricardo Peixoto.-Brasília,2016. 174 p. Dissertação (Mestrado-Mestrado em Agronomia)-Universidade de Brasília, 2016. 1. Tomate cereja. 2. Porta-enxerto. 3. Cama de frango. 4. Sistema orgânico. 5. Cultivo protegido. I. Peixoto, José Ricardo, orient. II. Título. vi REFERÊNCIA BIBLIOGRÁFICA ALBINO, V.S. Uso de porta-enxertos e níveis de adubação orgânica em tomateiro tipo cereja, sob ambiente protegido, cultivado em sistema orgânico.
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