ANDRADE, L. O.; http://lattes.cnpq.br/0545246175039812; ANDRADE, Leandro Oliveira de.
Résumé:
Agroecology is an agricultural practice that, through the use of
knowledge and the pursuit of sustainability, encourages the recycling of components of.
production. In this sense both the use of manure as well as the reuse of treated water can
be considered for planting guidelines for the practice of an agroecological farming.
Therefore we evaluated the agroecological production of coloured sunflower irrigated
with wastewater and fertilized with bovine manure. An experiment was conducted in
greenhouse belonging to the Universidade Federal de Campina Grande, two trials
followed by two cycles of production. During the first-test we tested four varieties of
sunflower for cut (V, - EMBRAPA 122 V2000; V2 - Sol Noturno; V3 - Sol Vermelho
and V4 - Debilis Creme) under two irrigation water qualities (A| - Supply Water, A2 -
Treated Wastewater). We evaluated the components of growth and its development,
production and biomass components. At this, stage, the wastewater was considered
which brought most contribution in terms of growth variables plant height (AP), number
of leaves (NF) and stem diameter (DC), and outer (DE) and inner (DI) diameter of
chapter and number of petals (NP). The variety Debilis Creme was the one that showed
less increments while Sol Noturno was the one that lasted longer after harvest. In terms
of biomass the variety EMBRAPA 122 V2000 showed the worst performance and this
same question, the use of wastewater reflected in better results, which are significant. In
the second experimental phase, where we tested a variety Sol Noturno, considered one
of the best performances of the previous experiment, two types of irrigated water (Ai -
Supply Water, A2 - Treated Wastewater) under fertilization with four different levels of
cattle manure (D, - 5%, D2 - 10%, Q3 - 15% and D4 - 20%). In addition to all the
variables tested in the previous experiment, with the exception of biomass, we evaluated
the plants and soil in terms of contents of nutrients. With the use of wastewater
increases were the largest in components of growth, AP, NF and DC, but showed no
differences compared to the use of supply water for the production of coloured
sunflower flowers, the latter in the case of continuous use, potentially causing risks of
soil salinization and sodification. Dose of 5% manure was responsible for the precocity of the plants, 10% was the most influential in the AP, NF and DC, during most of the
periods studied, even influencing the accumulation of nitrogen in the stems and leaves,
and the dose of 15% did not differed statistically in most of the variables studied. Dose
of 20%, with 15% accounted for the greatest potential risk to the soil.
