Ammonia volatilization from surface application of organic residues and urea on Marandu palisadegrass.

The objective of this study was to measure ammonia volatilization from surface application of pig slurry, poultry litter, urea and no fertilization. An experiment was conducted in a randomized block design, in plots repeated over time, with four treatments and four replications. The fertilizers tested were: mineral fertilizer (70 kg ha-1 N, 100 kg ha-1 P2O5 and 30 kg ha-1 of K2O, as urea, triple superphosphate and potassium chloride, respectively), pig slurry (200 m3 ha-1 applied in November 2008 and 200 m3 ha-1 applied in April 2009) and poultry litter (10 t ha-1 applied in November 2008 and 10 t ha-1 applied in April 2009). Five evaluations were performed with 24-hour intervals. Foams were used with glycerin and sulfuric acid, internally fixed in PET bottles for collecting ammonia. After collected, the samples were sent to the laboratory to determine volatilized ammonia levels by the semi-micro Kjedahl distillation method. Fertilization with chicken litter had lower ammonia volatilization in relation to urea and pig slurry. Most of the ammonia volatilization from pig slurry occurred within 48 hours after application, totaling losses of 630 g kg-1 of a total of 8.25 kg ha-1 of volatilized ammonia. The biggest loss by ammonia volatilization was from fertilization with urea, totaling approximately 80 g kg-1 of N applied.

Bibliographic Details

Main Authors:	VANIN, A., MENEZES, J. F. S., BENITES, V. de M., SIMON, G. A.
Other Authors:	Álisson Vanin; June F. S. Menezes; VINICIUS DE MELO BENITES, CNPS; Gustavo A. Simon.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2013-04-08
Subjects:	Losses, Pig slurry, Poultry litter, Brachiaria Brizantha, nitrogen,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/955157 https://doi.org/10.1590/S1516-35982013000400010
Tags:	Add Tag No Tags, Be the first to tag this record!