Trough and pot crop systems with leaching recirculation and defoliation levels for mini tomatoes

Sistemas de cultivo em calhas x vasos com recirculação do lixiviado e níveis de desfolha para minitomates

Lais Perin Roberta Marins Nogueira Peil Daniela Höhn Douglas Schulz Bergmann da Rosa Albertina Radtke Wieth Paulo Roberto Grolli About the authors

ABSTRACT.

The use of raw rice husk as substrate allows the use of crop systems that promote the recirculation of leachate in long crop cycles. Mini tomatoes present relatively low demand for photoassimilates. Thus, partial defoliation of the sympodium could benefit the crop without damage to the production or quality of the fruits. The objective of this work was to evaluate the plant growth, fruit yield and fruit quality of Cherry Hybrid Wanda and Grape Hybrid Dolcetto mini tomatoes cultivated in two recirculation crop systems (pots and troughs), using raw rice husk as substrate, under three defoliation conditions (without defoliation, removal of one and two leaves of the sympodium). The Cherry cultivar showed higher plant growth, fruit yield and mean fruit size. The Grape cultivar produced fruits with higher sugar concentration. For the Grape cultivar, the removal of one sympodium leaf did not affect the plant responses. However, for the Cherry cultivar, it was necessary to maintain the complete sympodium. The trough cultivation system improved plant growth and yield, whereas the pot system increased fruit sugar concentration.

Keywords:
cherry; grape; growth; Solanum lycopersicum; rice husk; substrate

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