Maurício Dominguez Nasser

Produtividade e características físicas de frutos de Passiflora edulis enxertado sobre Passiflora gibertii em diferentes espaçamentos de plantio

The objective of work was to evaluate the productivity and physical characteristics of fruits of yellow passion fruit (Passiflora edulis Sims) grafted on Passiflora gibertii in different planting densities. The experiment was carried in Adamantina, SP, Brazil, from May 2009 to April 2010, adopting the experimental design in randomized, with six treatments and four replicates. The treatments were different planting spacing: T1 - 1.0 m (3.125 plants/ha); T2 - 1.5 m (2.083 plants/ha); T3 - 2.0 m (1.563 plants/ha); T4 - 3.0 m (1.042 plants/ha); T5 - 4.0 m (781 plants/ha); T6 - 5.0 m (625 plants/ha). The distance between the lines was 3.2 m for all the treatments. The variables evaluated were: diameter of fruits, number of fruits, weight of fruits and productivity. The planting density did not favor diameter and weight of fruits. It was observed a smaller number of fruits in smaller spacings, which were compensated by productivity.

Desenvolvimento de maracujazeiro-amarelo enxertado sobre maracujazeiro-doce em diferentes espaçamentos de plantio

The objective of this work was to evaluate the vegetative growth of yellow passion fruit grafted on sweet passion fruit, in different plant spacing, in area with description of premature death of plants. The experiment was carried out in Adamantina, SP, Brazil, from April 2008 to June 2009, adopting the randomized experimental design, with six treatments and four replications. The treatments were different planting spacing: T1, 1,0 m (3.125 plants/ha); T2, 1,5 m (2.083 plants/ha); T3, 2,0 m (1.563 plants/ha); T4, 3,0 m (1.042 plants/ha); T5, 4,0 m (781 plants/ha) and T6, 5,0 m (625 plants/ha). The distance between the lines was 3,2 m for all the treatments. The variables evaluated were: rootstocks and grafts stem diameter, internode length, secondary branches length and tertiary branches number. Planting density did not favor the growth of the rootstocks plants.

MODIFIED PASSIVE ATMOSPHERE IN POST-HARVEST MANGABA FRUIT CONSERVATION IN THREE MATURITY DEGREES

Mangaba fruits are highly perishable, presenting short shelf life, rapid maturation and delicate and fragile bark, making it difficult to commercialize over long distances. The objective of this study was to evaluate the best harvest maturity degree as well as the most suitable modified atmosphere for post-harvest quality preservation. Mangaba fruits maturity degrees were: green, middle-mature and mature; and packed in three types of modified atmosphere: polyethylene terephthalate – PET; expanded polystyrene tray with polyvinyl chloride film (PVC) and low density polyethylene (LDPE) packaging with lid. In each evaluation were analysed: loss of fresh mass, firmness, ascorbic acid, soluble solids, titratable acidity, pH and reducing sugars. Falling mangaba limit the storage period in 6 days, regardless modified atmosphere used, presenting greater loss of mass, reducing sugar content and less firmness. These fruits must be destined to processing, in order to add value to the product. Mangabas harvested in middle-mature stage conditioned in polyethylene tray with PVC stored at a temperature 3 ° C ± 1 and 80% ± 1 RU maintains ascorbic acid contents during the storage period.