19
Views
10
CrossRef citations to date
0
Altmetric
Original Articles

Nitrogen use efficiency by winter barley under different climatic conditions

, &
Pages 1249-1261 | Published online: 21 Nov 2008
 

Abstract

The proportion of straw and grain as well as of nitrogen (N) in the barley (Hordeum vulgare L.) plant was greatly changed by the distribution of rain in the pre‐ and post‐anthesis periods and by the existence of air temperatures above 30°C during grain filling along with N fertilizer rate. The response of barley to N rates of 0, 40, 80, 120, and 160 kg N/ha was studied over a three‐year period. Adequate rainfall in the pre‐anthesis period, little rain in the post‐anthesis period, and air temperatures above 30°C during the hard dough stage of the grain development, produced high N translocation to the grain as well as a positive response on grain yield and N content in the grain up to a fertilizer rate of 118 N kg/ha. Above this rate, grain yield decreased, while the N content in grain continued to increase. Optimum moisture conditions during the pre‐ and post‐anthesis periods, and mild temperatures during the grain filling period, produced a good grain yield response to N fertilizer rate, increases up to 131 kg N/ha without varying the N content in grain. The N translocation efficiency was somewhat lower than low rainfall in the post‐anthesis period. Low rainfall in the pre‐anthesis period and air temperatures above 30°C in the early milk stage of the grain made grain filling difficult, even when the rainfall was sufficient in the post‐anthesis period. Hence under these conditions, N fertilizer rate did not increase the grain yield, but the N content and the N‐translocation efficiency decreased with increasing N fertilizer rates.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.