Ricardo Sfeir de Aguiar

PRODUÇÃO E QUALIDADE DE FRUTOS HÍBRIDOS DE MARACUJAZEIRO-AMARELO NO NORTE DO PARANÁ

ABSTRACTNowadays there are fourteen cultivars of yellow passion fruit on the National Register of Cultivars of the Brazilian Ministry of Agriculture. The improvement of plant breeding in this crop is of great importance to provide new cultivars adapted to the producing regions. Thus, the aim of this study was to evaluate the production and fruit quality of thirteen hybrids of yellow passion fruit plants grown in the northern Parana. The evaluations were performed during two cycles of crop production from April to July 2009 and from January to July 2010 with weekly harvests of ripe fruits. The production was determined by weighing the total output and counting the number of fruits per plant. The evaluated quality characteristics of the fruits were: weight, length, diameter, diameter/length ratio, thickness, pulp yield, total soluble solids (TSS), total titratable acidity (TTA ) and TSS/TTA ratio. Hybrids ‘66’ and ‘65’ respectively showed the highest yield and greatest number of fruits in the accumulated of the two crops. The fruits of the hybrid ‘72’ stood out on desirable quality characteristics for fresh consumption, while the hybrid ‘69’ showed important features for the juice industry.

Tamanho de recipientes e tempo de formação de mudas no desenvolvimento e produção de maracujazeiro-amarelo

The size of containers and the period of seedling formation in the nursery are factors directly related with the quality of passion fruits seedlings, but it is important also to check out if the development in the nursery is reflected in the performance of adult plants in the field. . The aim of this study was to evaluate the effect of the size of containers and the period of seedling formation in yellow passion fruit development and production. The experimental design was a randomized block, arranged in a factorial 3 (sizes of containers) x 3 (periods of seedling formation) with four replications and four plants per plot. The containers evaluated had volume of 400, 800 to 1,200 cm3 and the seeds were sowed in March, April and May. The seedlings were transplanted to the field in September, at the age of 180, 150 and 120 days old. The height of the seedlings in the transplant, total crop production, number of fruits per plant and fruit mass during the first cycle of crop production were evaluated. The vegetative growth of the seedlings is proportional to the size of the container and to the time for formation. Sowing in May in 1,200 cm3 is more appropriate because plants have higher or equal fruit production to the other treatments in a shorter period of formation in the nursery.

PERFORMANCE OF ‘NANICÃO JANGADA’ BANANA PLANTS INTERCROPPED WITH WINTER COVER CROPS

The use of cover crops species may be an important strategy in the pursuit of sustainability of agroecosystems, considering benefits to soil, such as improvements of physical and chemical characteristics, and weed control. The objective of this study was to evaluate the effect of winter cover crops and other soil managements on chemical soil properties, on the cycle, on the production of the first cycle and on the fruit quality of banana cv. Nanicao Jangada in Andira – PR, Brazil. The experiment was carried out in a commercial. Planting of banana suckers from the grower area occurred in the first half of March 2011, with a spacing of 2.40 m between rows and 1.90 m between plants. The experiment was designed in randomized blocks with four replications and six plants per plot. The six treatments were: black oat (Avenastrigosa Schreb), forage turnip (Raphanus sativus L. var. oleiferus), consortium of black oat and forage turnip, chicken litter, residues of banana plants, and bare ground. The evaluations were vegetative development and life cycle of banana plants, yield and quality of fruits, soil chemical characterstics, and fresh and dry mass of green manures. The results were submitted to ANOVA (F Test), and Tukey test at 5 % probability. Black oat and black oat with forage turnip consortium were superior in biomass production. Systems of soil management had no effect on the variables, except in the periods between planting and flowering and between planting and harvest, which were shorter in the treatment of soil management with crop residues, longer in the treatment with forage turnip, and intermediate in the other treatments.