Postanthesis remobilisation and losses of nitrogen in wheat in relation to applied nitrogen

A ¹⁵N leaf feeding technique was used to measure the extent of remobilisation and loss of nitrogen (N) that had been accumulated prior to anthesis in wheat plants that received three rates of N fertilizer. Uptake of postanthesis N to the heads was reduced as the quantity of applied N was increased....

Full description

Saved in:
Bibliographic Details
Published in:Plant and soil 1993-10, Vol.155 (1), p.179-181
Main Authors: Palta, J.A. (Division of Plant Industry CSIRO, Wembley, W.A. (Australia). Dryland Crops and Soils Research Unit), Fillery, I.R.P
Format: Article
Language:English
Subjects:
ABONOS NITROGENADOS
ABSORCION DE SUSTANCIAS NUTRITIVAS
ABSORPTION DE SUBSTANCES NUTRITIVES
Agrology
AZOTE
ENGRAIS AZOTE
Flowering
ISOTOPE
ISOTOPES
ISOTOPOS
NITROGEN
NITROGEN FERTILIZERS
NITROGENO
NUTRIENT UPTAKE
Plants
Soil air
Straw
Tillers
TRITICUM AESTIVUM
Wheat
Wheat soils
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A ¹⁵N leaf feeding technique was used to measure the extent of remobilisation and loss of nitrogen (N) that had been accumulated prior to anthesis in wheat plants that received three rates of N fertilizer. Uptake of postanthesis N to the heads was reduced as the quantity of applied N was increased. This reduction of postanthesis N uptake did not affect the quantity of N in the heads because the loss of preanthesis accumulated N was reduced and the extent of remobilised preanthesis N increased at higher rates of N application. At the lowest rate of N application the increase in ¹⁵N in the heads of fertile shoots arose chiefly from the remobilisation of N in the stem supporting the head. At higher rates of N application this source of N was increasingly supplemented by N remobilised from infertile tillers and roots.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF00025013