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Mossoró, Brazil

Neto I.S.L.,Campus Universitario | Guimaraes I.P.,UFERSA | Batista P.F.,UFERSA | Aroucha E.M.M.,BR 110 | de Queiroz M.A.,Caixa Postal 171
Revista Caatinga | Year: 2010

In Brazil, the production of watermelon with seeds is highly representative. However, available information about fruit quality of different varieties grown in the same environment is still rare, which makes it necessary to carry out trials that can fill this gap. Thus, the present study aimed to evaluate the postharvest quality of different varieties of watermelon (Crimson Sweet, Charleston Gray, Sugar Baby, Fairfax and Tender sweet), grown under conventional conditions in Mossoró - RN. The experiment was carried out from September to November 2008 in the experimental field of the Federal Rural University of the Semiarid (UFERSA). The data for the fruit quality were recorded in the Laboratory of Postharvest of UFERSA. The experiment was set under a completely randomized design with six replications and each replication consisted of a fruit. The quality characteristics were analyzed: fruit fresh mass (kg), fruit dimensions (greater length and width), overall appearance, pulp yield in percentage, seed characteristics, pH, acidity, vitamin C, soluble solids and SS/TA ratio. The physical determinations showed variations for fruit fresh mass (4.2 to 9.7 kg), pulp yield (42.0 to 58.5%), rind thickness (1.1 to 2.5 cm), as well as to the number and mass of seeds. In the physical-chemical determinations it was observed phenotypic uniformity among the varieties for almost all variables and, although all of them favorable to consumption, this result indicates narrowing of the genetic basis of varieties, which makes it necessary the evaluation of other genotypes. Source

This work aimed to study the agronomic feasibility of the arugula (A) and lettuce (L) bicropping intercropped with carrot (C) under different amounts of roostertree incorporated into the soil and proportions of population densities among component crops in semiarid conditions of the Rio Grande do Norte state. The experimental design was randomized complete block with four replications, with the treatments arranged in a factorial 4 x 4. The first factor was constituted by the amounts of roostertree incorporated into the soil (10, 25, 40 and 55 t ha-1 on a dry basis) and the second factor by the proportions of population densities of the component crops in polyculture [(50A-50C-50L (%); 40A-50C-40L (%); 30A-50C-30L (%) and 20A-50C-20L (%) of the recommended populations in sole crops - RPSC)]. The leafy vegetable crops were planted in two cultivations during the carrot cycle, and a joint analysis was carried out involving the two cultivations in the 4 x 4 factorial scheme. The characteristics evaluated were green mass yield (arugula), dry mass of shoots and productivity (lettuce), total, commercial and classified productivity of carrot roots. The modified monetary advantage was used to evaluate the agronomic feasibility of intercropping systems. The use of roostertree as green manure proved viable in the polyculture of arugula, carrot, and lettuce. The major agronomic performance of the arugula, carrot and lettuce in the polyculture was registered in the amount of 55 t ha-1 of rooster-tree incorporated into the soil. The population density proportions of arugula, carrot and lettuce of 50A-50C-50L (%) of the RPSC were those that provided the greatest agronomic feasibility of the polycultures. © 2015 Universidade Federal Rural do Semi-Arid. All rights reserved. Source

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