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Titolo:
EFFECTS OF N-15-LABELED AMMONIUM-NITRATE AND UREA ON SOIL-NITROGEN DURING GROWTH OF WHEAT (TRITICUM-AESTIVUM L) UNDER FIELD CONDITIONS
Autore:
HAMID A; AHMAD M;
Indirizzi:
NUCL INST AGR & BIOL,DIV SOIL SCI,POB 128 FAISALABAD PAKISTAN
Titolo Testata:
Biology and fertility of soils
fascicolo: 3, volume: 17, anno: 1994,
pagine: 232 - 236
SICI:
0178-2762(1994)17:3<232:EONAAU>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERTILIZER NITROGEN; WINTER-WHEAT; FATE; TRANSFORMATIONS; N-15;
Keywords:
N-15-LABELED FERTILIZER; ADDED N INTERACTION; FERTILIZER N UPTAKE; SOIL N UPTAKE; WHEAT; TRITICUM-AESTIVUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
A. Hamid e M. Ahmad, "EFFECTS OF N-15-LABELED AMMONIUM-NITRATE AND UREA ON SOIL-NITROGEN DURING GROWTH OF WHEAT (TRITICUM-AESTIVUM L) UNDER FIELD CONDITIONS", Biology and fertility of soils, 17(3), 1994, pp. 232-236

Abstract

We studied the effects of N-15-labelled ammonium nitrate and urea on the yield and uptake of labelled and unlabelled N by wheat (Triticum aestivum L., cv. Mexi-Pak-65) in a field experiment. The dry matter andN yields were significantly increased with fertilizer N application compared to those from unfertilized soil. The wheat crop used 33.6-51.5and 30.5-40.9% of the N from ammonium nitrate and urea, respectively. Splitting the fertilizer N application had a significant effect on the uptake of fertilizer N by the wheat. The fertilizer N uptake showed that ammonium nitrate was a more available source of N for wheat than urea. The effective use of fertilizer N (ratio of fertilizer N in grain to fertilizer N in whole plant) was statistically similar for the two N fertilizers. The application of fertilizer N increased the uptake of unlabelled soil N by wheat, a result attributed to a positive addedN interaction, which varied according to the fertilizer N split; six split applications gave the highest added N interaction compared to a single application or two split applications for both fertilizers. Ammonium nitrate gave 90.5, 33.5, and 48.5% more added N interaction thanurea with one, two, and six split N applications. A values were not significantly correlated with the added N interaction (r = 0.557). The observed added N interaction may have been the result of pool substitution, whereby added labelled fertilizer N replaced unlabelled soil N.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 12:31:08