Differential utilization of dissolved organic and inorganic nitrogen by wheat (Triticum aestivum L.)

Zafar Iqbal, Muhammad Khalid, Nawaf Soleman, Davey L. Jones

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A study was conducted under greenhouse conditions on wheat to investigate the utilization of dissolved organic nitrogen (N) in comparison with conventionally applied inorganic N sources (INS). Nitrogen was applied at a rate of 90 kg N ha-1 in an inorganic form, an organic high molecular weight (MW) form (casein, haemoglobin, albumin), and an organic low MW amino acid form (glycine, alanine, valine). Inorganic N sources recorded the maximum response (126% to 150%) in total dry matter (DM) production while dissolved organic nitrogen (DON) sources showed 61% to 116% increase in comparison to the control treatment. Glycine gave the maximum DM production, which was comparable with both INS treatments. In hydroponics, greater utilization occurred and the shoots had a higher N content in comparison to those grown in soil. The concentration of DON and NO3- in soil after wheat harvest was similar in all the treatments.

Original languageEnglish
Pages (from-to)2094-2107
Number of pages14
JournalJournal of Plant Nutrition
Volume37
Issue number13
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

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