Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system

Chagas, Wantuir Filipe Teixeira; Guelfi, Douglas Ramos; Caputo, André Luiz Carvalho; Souza, Taylor Lima de; Andrade, André Baldansi; Faquin, Valdemar

doi:10.1590/1413-70542016405008916

Cited by 29 publications

(27 citation statements)

References 29 publications

(35 reference statements)

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“…The total of N content is 39%, with 12% elemental sulfur. Polyblen Montanha ® differs from Polyblen Extend ® because it has a greater thickness of the coating layer (CHAGAS et al, 2016). 6) Urea + Polyurethane -It has 40% of N and 2% of K 2 O. Polyurethane coats the urea.…”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, fertilization with 20g of P 2 O 5 + 6,72g of K 2 O pot -1 according to Chagas et al (2016), using triple superphosphate and potassium chloride as sources, was carried out which were homogenized to the soil on 06/22/2015. After that, the coffee plants were transplanted (two plants per pot), with pruning of the apical region of the root system.…”

Section: Clay Sandmentioning

confidence: 99%

“…This alkaline pH environment hinders the passage of ammonia (NH 3 ) to ammonium (NH 4 + ) by the absence of protons (H + ions), which 1,2,3,4,5,6 Universidade Federal de Lavras/UFLA -Departamento de Ciência do Solo/DCS -Cx. P. 3037 -37.200-000 -Lavras-MG-wantuirfilipe@gmail.com, douglasguelfi@dcs.ufla.br, jordanarlacerda@hotmail.com, leandcampos@yahoo.com.br, andre.batp@hotmail.com, vafaquin@dcs.ufla.br concentrate ammonia in this region and increase the loss by volatilization of N-NH 3 (CHAGAS et al, 2016). These losses contribute to a decrease in nitrogen fertilizer efficiency and can reach values up to 40% of the total N that is applied (FARIA et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen Fertilizers Technologies for Coffee Plants

Chagas

Guelfi

Lacerda

et al. 2019

C.Sci.

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The application of urea in coffee crop has caused high losses of nitrogen (N) by volatilization, causing low use and recovery of this nutrient. This low use of N may interfere in the growth and nutrition of the coffee crop and thus, influence the efficiency of the nitrogen fertilization. The aim in this work was to assess the growth, nutritional and physiological characteristics and the agronomic efficiency of the nitrogen fertilization with different nitrogen fertilizer technologies. The experiment was performed in a greenhouse in pots with a volume of 14 L. In each pot, it was performed the transplanting of two plants of coffee. The experimental design was entirely randomized, with four replicates. The following nitrogen fertilizers were applied in the dose of 10g pot-1 , devided into three applications with interval of 50 days: Conventional urea; ammonium nitrate; urea + formaldehyde; Polyblen Extend ® ; Polyblen Montanha ® ; Urea + polyurethane; urea + plastic resin; ammonium sulfate + CaCO 3 and the control, without N application. After cropping, it was evaluated the growth, nutritional and physiological parameters. Afterward, it was calculated two agronomic efficiency index of the nitrogen fertilization. The highest values of plants height, the total dry mass of plants and leaf area in coffee seedlings were found with the application of Polyblen Extend ®. This blend also provided higher accumulation of N in the leaf and the whole plant. The application of Polyblen Extend ® provided higher agronomic efficiency and also enhanced the photosynthetic rate in the coffee plants.

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Section: Methodsmentioning

confidence: 99%

Section: Clay Sandmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitrogen Fertilizers Technologies for Coffee Plants

Chagas

Guelfi

Lacerda

et al. 2019

C.Sci.

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“…Zavaschi et al () evaluating the volatilization of ammonia and corn yield components after application of polymer‐coated urea, concluded that polymer‐coated urea did not induce reduction in ammonia losses by soil volatilization. Chagas et al () evaluating the volatility of ammonia from total and stabilized mixtures and controlled coffee control, concluding that the ammonium nitrogen promotes the desalination of N–NH 3 by volatilization, independently of the nutritional conditions of each nitrogen fertilization. The use of a controlled reduction grid as N losses compared to a conventional urea.…”

Section: Introductionmentioning

confidence: 99%

Extruded urea could reduce true protein source in beef cattle diets

Moraes

Ítavo

et al. 2019

Animal Physiology Nutrition

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Rumen micro‐organisms are capable of producing microbial protein from ammonia and carbon skeleton, and non‐protein nitrogen (NPN) may be one of the sources of ammonia. Alternative source of NPN is the slow release of ammonia sources in which the product is the extrusion of starch with urea. This work aimed to determine the effects on nutrient intake, ingestive behaviour, digestibility, nitrogen balance, ruminal pH, rumen ammonia nitrogen, volatile fatty acids (VFA) and blood parameters with increased levels of extruded urea (50, 60, 70 and 80 g/100 kg of body weight [BW]) in beef cattle diet. Four rumen cannulated crossbred steers with initial mean weight of 336 ± 47 kg in a 4 × 4 Latin square design were distributed. Diets were formulated with 400:600 g/kg roughage:concentrate ratio on dry matter based and provided once per day, being used whole corn silage as roughage. There were no effects on nutrient intake (kg/day), ingestive behaviour, apparent digestibility, nitrogen balance, volatile fatty acid (VFA) and blood parameters in extruded urea treatment groups. Similar results were observed on time spent on feeding, rumination and idleness. There were positive linear effects (p = 0.022) on rumen pH in the time of 8 hr after feeding and also on plasma concentration of the extruded urea levels (p = 0.039); whereas a linear negative effect (p = 0.030) was observed on ammonia nitrogen for the collection time of 2 hr after feeding. Increased levels of extruded urea could maintain nutrient intake, digestibility, ingestive behaviour, rumen pH and blood parameters in normal conditions. In conclusion, we recommend the extruded urea use with values up to 80 g/100 kg BW in confined beef cattle that receive balanced diets with 140 g/kg of crude protein.

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“…A ureia é o principal fertilizante nitrogenado utilizado na agricultura, com participação de cerca de 64% (Chagas et al, 2016). Após a hidrólise da ureia podem ocorrer elevadas perdas de nitrogênio (N) por volatilização da amônia e por lixiviação de nitrato, especialmente em solos com elevada CTC (Fey et al, 2010;Bortolotto et al, 2012), contribuindo com os impactos ambientais negativos sobre o ambiente.…”

Section: Introductionunclassified