Banca de DEFESA: PAZ PAULO ANTÓNIO

FERTIRRIGATION IN BEET CULTIVATION USING WASTEWATER FROM DAIRY CATTLE FARMING TREATED IN AN ORGANIC PRODUCTION SYSTEM.

Biofertilizer; Organic production; Biological treatment; Olericulture.

The use of wastewater is necessary nowadays, due to the

water scarcity, which is not a problem that only occurs in Brazil, but in the

world. The lack of water can compromise irrigated agriculture, being one of the

activities that consume the most water. Treated effluents can be used as

alternative sources to meet water and nutritional demand. Beetroot is a

demanding crop in nutritional terms, requires balanced fertilizer management that

has the capacity to replace the nutrients that were extracted by the crop, in order to

prevent soil depletion. The present work aims to analyze the

agronomic and sanitary aspects in beet cultivation subjected to the process of

fertigation with wastewater from dairy cattle farming treated in a Unit

Treatment Pilot in a Constructed Wetland system (WCs). The work was

carried out Integrated Agroecological Production System (SIPA) or known as

Little farm at km 47, to carry out the fertigation process, water was used

dairy cattle waste (ARB) treated in the Pilot Treatment Unit

(UPT) and two varieties of red Beetroot (Beta Vulgaris L.) were selected

and white, the ARB doses, calculated as a function of the N doses (%), where the

reference used (100% N) was 90 kg. ha -1 for vegetables, treatments

applied were: (0, 800, 400 and 1200 mL). In the present study, it was observed that

significant differences occurred, as in the case of fresh bulb mass (MFB) of

purple beet and not significant in variables such as number of leaves (NF), height of

plant (AP) and bulb diameter (DB) of the two varieties and it was also found

absence of Salmonella and the amount of < 3 NMP. g -1 of E. Coli in all

treatments. Therefore, wastewater did not influence the development of the crop

nor in microbiological contamination, the products are in accordance with legislation

established by ANVISA.