Minitomateiro consorciado com adubos verdes fertirrigados com efluente tratado de laticínio

Abstract

Mini Tomato intercropped with fertirrigated green manure with treated dairy effluent The consumption of cherry tomato has been on the rise in the Brazilian salad market. The green manures in intercropping with the cherry tomato and the use of treated effluents from the dairy industry for irrigation are sustainable techniques that can allow the economic production of this crop The objective of the present work was to evaluate the productivity and post-harvest of the cherry tomato cultivated in a consortium system with different green manures, fertirrigated with treated dairy effluent. The experiment was carried out in a randomized complete block (5 x 2) with four green manures: Canavalia ensiformis (jack bean), Crotalaria spectabilis (Crotalaria-espectábilis), Lupinus albus (white lupine) and Pennisetum glaucum (millet) and one control (no green manuring), and two water sources used in fertigation (tap water and treated anaerobic effluent), with four replications. The effluent treated by anaerobic system was characterized biweekly throughout the experiment and were evaluated: foliar diagnosis of mini tomato, phytomass production of green manures and nutrient accumulation, productivity, chemical composition and fruit quality of mini tomato and water use efficiency. The highest levels of nitrogen were determined in the leaves of the single cherry tomato fertirrigated with tap water and for the cherry tomato in consortium with crotalaria-espectábilis fertirrigated with treated anaerobic effluent. The application of the treated dairy effluent adequately provided the nitrogen supply to the cherry tomato. The green manures, with the exception of millet, did not compete for nutrients with the cherry tomato, although, did not favor the productivity of the cherry tomato. The highest number of fruits occurred for the single crop and for the cherry tomato in consortium with white lupine. The fruits of the cherry tomato showed higher soluble solids contents when fertirrigated with treated dairy effluent. The crotalária-espectábilis and jack bean consortia had the greatest water use efficiencies in fruit production, and fertirrigated treatments with tap water showed higher WUE in comparison to fertirrigates with anaerobic effluent. The use of the treated anaerobic effluent of dairy reduced on average 90.89% of the application of nitrogen via fertilizer. It is possible to replace pure or potable water by treated dairy effluent in the cherry tomato fertirrigation.

Arroz irrigado por gotejamento com água residuária da piscicultura

“…Além disso, essa prática desempenha um papel fundamental na minimização da poluição da água, protegendo a saúde dos corpos d'água (Menegassi et al, 2020;Lima, 2020;Brichi, 2019).…”