Dissertação
Inibidor de nitrificação adicionado ao solo com cama de aviário e sua influência na dinâmica do nitrogênio e do carbono
Fecha
2012-08-31Registro en:
BALLEM, Andressa. Nitrification inhibitor added to soil with poutry manure influencing nitrogen and carbon dynamics. 2012. 58 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2012.
Autor
Ballem, Andressa
Institución
Resumen
Nitrification inhibitors can reduce the potential for environmental contamination of animal
wastes, relatively to nitrate (NO3
-) leaching and nitrous oxide (N2O) emission. However, this
strategy has not yet been sufficiently evaluated by research, especially with poultry litter (PL).
Therefore, the objective of this study was to evaluate the effect of the product "Agrotain Plus"
(AP), containing 81% of dicyandiamide (DCD), on the nitrification inhibition, ammonia
(NH3) volatilization and carbon (C) and nitrogen (N) PL mineralization. Two laboratory
experiments were conducted, using a Hapludalf soil collected in the 0-10 cm layer. In one
experiment, conducted for 54 days, the treatments consisted of PL (4.7 Mg ha-1, dry basis)
incorporated in the soil, without and with AP doses (3.5, 7.0 and 14 kg ha-1), and without PL
or AP (control). In the other experiment, conducted for 69 days had all these treatments plus
two additional treatments of CA on the soil surface, without and with AP (7 kg ha-1). The AP
delayed NO3
- production in soil, and this inhibitory effect was more intense at the highest
dose of AP (14 kg ha-1). NH3 volatilization occurred only when PL remained on the soil
surface and was favored by the addition of AP. The AP addition increased PL C- and Nmineralization
by 4 and 28%, respectively. The results of this study indicated that
dicyandiamide (DCD), contained in the product Agrotain Plus, reduces the nitrification rate of
PL ammonia in soil and could be a strategy to preserve the N of this organic material and
reduce potential pollution of the environment.