RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Estimating ammonia volatilization losses from urea fertilizers using a simplified micrometeorological sampler

Auteur(s) / Author(s)

FOX R. H. (1) ; PIEKIELEK W. P. (1) ; MACNEAL K. E. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Agronomy, Pennsylvania State Univ., University Park, PA 16802, ETATS-UNIS

Résumé / Abstract

The large amount of unincorporated, urea-containing fertilizer that is used on no-till corn (Zea mays L.) makes it imperative that we know the magnitude of NH3 volatilization loss from these fertilizers. Although there have been numerous studies to estimate these losses, in almost none of them were the losses measured under undisturbed field conditions. A simplified, micrometeorological method with NH3 samplers placed at the center of three replicates of 25-m-radius circular plots was used to estimate NH3 volatilization losses from 134 kg N ha-1 of surface-applied, unincorporated urea, sprayed urea-ammonium nitrate (UAN) solution, and dribbled UAN. The average NH3 volatilization losses during the first 10 to 20 d after application for a 3-yr period were 40, 22, and 17 kg N ha-1 from urea, sprayed UAN, and dribbled UAN, respectively. The losses from sprayed and dribbled UAN were not significantly different from each other and were, on average, significantly less than from urea. The rainfall in the first 6 d after application was <5 mm for all 3 yr of the experiment. Corn yields and N uptake generally reflected the measured NH3 volatilization losses, but were considered to be much less precise indicators of NH3 volatilization loss. One drawback of the simplified micrometeorological method is that large areas are needed to accommodate the 50-m-diam. plots and 100-m buffers between plots.

Revue / Journal Title

Soil Science Society of America journal    ISSN  0361-5995   CODEN SSSJD4 

Source / Source

1996, vol. 60, no2, pp. 596-601 (32 ref.)

Langue / Language

Anglais

Editeur / Publisher

Soil Science Society of America, Madison, WI, ETATS-UNIS  (1976) (Revue)

Mots-clés anglais / English Keywords

Field experiment

;

Zero tillage

;

Nitrogen fertilization

;

Loss

;

Volatilization

;

Sampler

;

Micrometeorology

;

Yield

;

Absorption

;

Zea mays

;

Ammonia

;

Urea

;

Ammonium Nitrates

;

Pennsylvania

;

Nutrient uptake

;

Gramineae

;

Monocotyledones

;

Angiospermae

;

Spermatophyta

;

United States

;

North America

;

America

;

Soils

;

Soil plant relation

;

Cereal crop

;

Nitrogen fertilizer

;

Ultisols

;

Nutrition

;

Mots-clés français / French Keywords

Essai en champ

;

Non travail sol

;

Fertilisation azotée

;

Perte

;

Volatilisation

;

Echantillonneur

;

Micrométéorologie

;

Rendement

;

Absorption

;

Zea mays

;

Ammoniac

;

Urée

;

Ammonium Nitrate

;

Pennsylvanie

;

Hapludult

;

Prélèvement nutriment

;

Gramineae

;

Monocotyledones

;

Angiospermae

;

Spermatophyta

;

Etats Unis

;

Amérique du Nord

;

Amérique

;

Sol

;

Relation sol plante

;

Plante céréalière

;

Engrais azoté

;

Ultisol

;

Nutrition

;

Udult

;

Mots-clés espagnols / Spanish Keywords

Ensayo en campo

;

Cero labranza

;

Fertilización nitrogenada

;

Pérdida

;

Volatilización

;

Muestreador

;

Micrometeorología

;

Rendimiento

;

Absorción

;

Zea mays

;

Amoníaco

;

Urea

;

Amonio Nitrato

;

Pensilvania

;

Absorción nutriente

;

Gramineae

;

Monocotyledones

;

Angiospermae

;

Spermatophyta

;

Estados Unidos

;

America del norte

;

America

;

Suelo

;

Relación suelo planta

;

Planta cerealista

;

Fertilizante nitrogenado

;

Ultisols

;

Nutrición

;

Localisation / Location

INIST-CNRS, Cote INIST : 6109, 35400004446523.0360

Nº notice refdoc (ud4) : 3047737



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas