Tomato fertigation with dairy cattle wastewater

Abstract

The use of wastewater in the fertigation of agricultural crops increases productivity and product quality, and contributes to reduce environmental pollution. In this work, the objective was to evaluate how the use of dairy cattle wastewater (DCWW) in the fertigation of tomatoes affected production and productivity, as well as foliar nutritional contents, in an organic farming system. Treatments consisted of six nitrogen doses (0, 50, 100, 200, 300 and 400%), having N recommendation for tomato (100 kg/ha) as reference, applied using DCWW via fertigation. DCWW is made up of washing water, urine, feces and milk. Stem diameter, branch length, weekly fruit yield per plant and aggregate productivity were evaluated. N, P, K, Ca, Mg, S, Cu, Mn, Fe, Zn and B foliar contents were quantified. Data were submitted to analysis of variance (p≤0.05) and, where significant, polynomial regression models were applied. Treatment means were compared by the Tukey test (p≤0.05). The highest production, productivity and nutrient foliar accumulation were observed when 400% of the N dose recommended for tomato was used. There was an increasing linear effect on weekly and aggregate yield and also on nutrient accumulation in leaves as function of the applied N dose. N fertilization in tomato organic production can be carried out using DCWW via fertigation, but with a complementary mineral fertilization to supply plants with adequate amounts of phosphorus and potassium.

Soil Fertility and Essential Oil Production in Citronella Cultivation Irrigated With Dairy Cattle Wastewater (Dcw)

“…In the study developed by Jorge et al (2017), the authors concluded that the use of DCW fertigation for tomato cultivation demonstrated that there was an increasing linear effect on production, on accumulated productivity and on the accumulation of nutrients in the leaves as a function of the DCW concentration, and that the highest weekly and aggregated yield of tomatoes, as well as the highest leaf nutrient content, were observed when 400% of the nitrogen concentration recommended for tomatoes was used. However, the authors still indicated that nitrogen fertilization must be carried out in the organic cultivation of tomatoes, which can be done through DCW fertigation, but that it must be supplemented in mineral form, in order to provide the adequate amount of phosphorus and potassium for the plants.…”

Sunflower biometrics and chemical salinity attributes of soil irrigated with waters of different qualities

“…Several researches have pointed out the possibility of irrigation of several plant species with poor quality water, being a widely studied practice and recommended by several researchers and water managers. From a nutritional point of view, studies have shown positive effects of irrigation with high salinity water, such as sewage, on the production and productivity of vegetables, proving the fertilizing effect of wastewater in numerous studies and in various cultures such as sunflower (Santos Júnior et al, 2014;Oliveira et al, 2017), pepper (Silva et al, 2019), melon (Costa et al, 2014), corn (Malafaia et al, 2016), tomato (Jorge et al ., 2017) and watermelon (Salgado et al, 2018).…”