Soil physical attributes in chemigated banana plantation with wastewater

Silva

et al. 2018

Agraria

ABSTRACT:The use of domestic sewage treated in irrigation as an alternative in arid regions. However, due to the high concentration of nutrients, the use these waters can soil degradation. The objective of this study was to evaluate the effect of the use of these waters on soil attributes. The experimental design was a randomized complete block design (4 x 2 x 3) in subdivided plots with four replications. The treatments consisted of three factors, four water sources in the irrigation (A 1 -sewage treated by UASB reactor, A 2 -treated sewage treated with anaerobic filtration, A 3 -treated sewage by anaerobic filtration and A 4 -water supply); two irrigation depths (L 1 -equal to crop evapotranspiration and L 2 -20% higher than crop evapotranspiration) and three soil layers (0-0.2, 0.2-0.4 and 0.4-0.6 m), the three soil layers were considered as subplots. The use of water sources A 1 and A 2 provided lower concentrations of sodium in the saturation extract. The use of domestic sewage treated in the irrigation provided an increase in the levels of Ca 2+ and Mg 2+ solubles in the soil and the EC without reach it saline. Greater nutrient accumulation was verified in the shallow layer of 0-0.20 m being influenced by the effective depth of the root system as well as by the climatic conditions of the region.Key words: seawage treatament; sodicity; soil salinity; water reuse Cultivo de girassol irrigado com esgoto doméstico tratado em Neossolo QuartzarênicoRESUMO: A utilização de esgotos domésticos tratados na irrigação desponta como uma alternativa em regiões áridas. Entretanto, devido à elevada concentração de nutrientes, o uso dessas águas pode ocasionar degradação do solo. Desse modo, objetivou-se avaliar o efeito da utilização destas águas nos atributos do solo. O delineamento experimental utilizado foi o casualizado em blocos em esquema fatorial (4 x 2 x 3) em parcelas subdivididas com quatro repetições. Os tratamentos consistiram de três fatores, quatro fontes de águas (A 1 -esgoto tratado por reator UASB, A 2 -esgoto tratado por decanto digestor associado à filtragem anaeróbia, A 3 -esgoto tratado por filtragem anaeróbia e A 4 -água de abastecimento); duas lâminas de irrigação (L 1 -igual à evapotranspiração da cultura e L 2 -20% superior à evapotranspiração da cultura) e três camadas de solo (0-0,2; 0,2-0,4 e 0,4-0,6 m), considerou-se as três camadas de solo como sub-parcelas. O uso das fontes de águas A 1 e A 2 proporcionaram menores concentrações de sódio no extrato de saturação. O uso de esgotos domésticos tratados na irrigação, elevou os teores de solúveis de Ca 2+ e Mg 2+ do solo e a CEes sem torná-lo salino. Maior acúmulo de nutrientes foram verificados na camada superficial de 0-0,20 m sendo influenciado pela profundidade efetiva do sistema radicular como também pelas condições climáticas da região.Palavras-chave: tratamento de esgoto doméstico; sodicidade; salinização do solo; reúso de água Cultivation of sunflower irrigated with domestic sewage treated in Quartzarenic Neosol Rev. Bras.

Section: /7supporting

confidence: 78%

Cultivation of sunflower irrigated with domestic sewage treated in Quartzarenic Neosol

Silva

et al. 2018

Agraria

“…According to and Alves et al (2015), in the soil total porosity and its subdivisions, the main interferences through handling wastewater would occur due to the suspended solids. Therefore, the relation with the highest values of macroporosity and lowest of microporosity obtained with the smaller doses of treated sewage effluent (TSE) are possibly related to the supply of organic substances that are part of TSE to the soil.…”

Section: Resultsmentioning

confidence: 99%

“…However, the increase of TSE doses and consequent elevation of supply to the total suspended solids (TSS), besides the increase in electrical conductivity (Tables 1 and 3), can be associated with a possible dispersed clay eluviation, causing pore clogging and consequent macroporosity reduction as shown in the treatments E 75% and E 100% for clay dispersion. Since macroporosity is essential for soil aeration and plant development, it can be concluded that high doses of TSE had a negative effect on soil quality (Alves et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Application of treated domestic sewage effluent on the quality indicators of an Oxisol cultivated with castor bean

et al. 2019

In semi-arid regions of developing countries worldwide it is necessary to develop low cost technology methods to acquire new water supplies. The objective was to evaluate the changes in the attributes of soil quality irrigated with treated sewage effluent. The treatments consisted of applying treated sewage effluent (TSE) and underground well water (UWW) in the following proportions: E 0% (chemical fertilization and UWW), E 25% (25% TSE and 75% UWW), E 50% (50% of TSE and UWW), E 75% (75% TSE and 25% UWW) and E 100% (100% TSE). The sodium content did not differ significantly among the treatments, but the sodium input diminished as the percentage of residuary water in the irrigation grew. There was a greater increment of microbial biomass carbon in the E 25% treatment. On the other hand, although treatments E 50% to E 100% have a greater nutrient input, they were no different from control treatments performed with well water. Treated domestic sewage effluent at a proportion of 25% is a feasible alternative for castor bean irrigation, however it is necessary to monitor the possible changes in the soil attributes over successive crops. Microbial attributes can be used as a quick, good indicator of changes in soil quality.

“…The use of wastewaters in banana crops alter soil organic matter and sodium contents (ALVES et al, 2015) and increases phosphorus, sulfur, total acidity, and base saturation levels in subsurface layers of irrigated soils (SANDRI; ROSA, 2017). These effects vary depending on the effluent composition, application management, and edaphic conditions.…”

Section: Introductionmentioning

confidence: 99%

Soil Chemical Properties in Banana Crops Fertigated With Treated Wastewater

et al. 2019

Determining the effects of using wastewater as fertilizer on soil chemical properties allows a safe reuse of this effluent in agriculture. This study evaluated the effects of fertigation with tertiary treated wastewater (TTW) from the Janaúba sewage treatment plant on chemical properties of a Latosol (Oxisol) with banana crops of the Prata-Anã cultivar in the semiarid region of Brazil. A randomized complete block design with four replications was used to test four TTW rates (70%, 130%, 170%, and 200% of the limit of 150 kg ha-1 year-1 of Na that can be applied to the soil) and compare them to a control without TTW. Soil samples from the 0.0-0.2, 0.2-0.4, 0.4-0.6, and 0.6-0.8 m layers were collected at the end of the first crop cycle to evaluate soil chemical properties-pH, soil organic matter (SOM), P, K, Na, Ca, Mg, Al, potential acidity (H+Al), base saturation, B, Cu, Fe, Mn, Zn, remaining P, and electrical conductivity (EC). The use of TTW increases soil pH and decreases exchangeable Al content, thus, reduces the need for liming. However, Na contents increased faster than EC in the soil, indicating that the use of TTW tends to alter soil physical properties over time. The use of TTW had no effect on the soil OM, P, Ca, Mg, and micronutrients contents, potential acidity, and base saturation. The changes in soil chemical attributes observed at the end of the first crop cycle were not limiting to the banana crop.