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Horticultura Brasileira

Print version ISSN 0102-0536

Abstract

BRANCO, Roberto BF et al. Successive organic cultivation of vegetable crops in two irrigation systems and two soil covers. Hortic. Bras. [online]. 2010, vol.28, n.1, pp.75-80. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362010000100014.

With the growing demand for ecological products new technologies are required for organic cultivation systems in order to provide a sustainable growth of this activity. This experiment evaluated the performance of vegetable cultivars and hybrids growing successively in the organic system, in different growth environments. The experimental design was randomized blocks with split split-plots with 3 replications, resulting in 24 experimental units. The following treatments were assessed: a) two irrigation systems, sprinkle and drip, b) two soil covers, plastic and straw of sugar cane and c) two hybrids or cultivars. Two different cropping sequences were carried out: (1) iceberg lettuce - tomato - broccoli and; (2) crisp lettuce - snap beans - cabbage. The agronomic characteristics of each species were evaluated. In sequence 1, iceberg lettuce growth performed better when irrigated by the drip system, but there was no difference between the soil covers and 'Rubette' presented higher yield. Higher tomato yields were observed in "mulching"plastic regardless the irrigation system and broccoli was unaffected by treatments. In sequence 2, crisp lettuce and snap beans were more productive when irrigated by drip and grown on plastic covering. Cabbage performed better with plastic film covering soil surface.

Keywords : drip; sprinkler; plastic mulching; straw of sugar cane.

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