Recovery of Field-Applied Fertilizer Nitrogen by Rice

Yusop, Mohd Khanif (1988) Recovery of Field-Applied Fertilizer Nitrogen by Rice. Pertanika, 11 (1). pp. 25-30.

[img] PDF


Field estimation of the recovery of fertilizer N applied to rice COryza sativa L.) was carried out as an appraisal of the prevailing fertilizer management practice. The study was carried out on a farmers field for two growing seasons. Soil samples at three depths, 0-15 cm, 15-30 cm and 30-45 cm and water samples were collected every two weeks during the growing season. The plant recovery of fertilizer N was estimated by the difference between the N treated plots and the controls. Although this method could overestimate the fertilizer N recovery due to priming effect, under the conditions in the study the effect was assumed to be minimal. An increase in ammonium N content in the soil was not observed even immediately after N application. The removal of fertilizer N from the soil through either plant uptake or loss processes was very rapid. Higher ammonium N was only detected in the water samples early in the growing season but not at the mid-season after the second N application. The recovery of fertilizer N in the plant were 36% and 30% during the main and off-seasons respectively. Most of the N was in the grain. About 69 kg of the 95 kg of the total N removed by the crops per hectare was derived from the soil. More than 64% of the fertilizer N applied was either lost or immobilized in the soil.

Item Type:Article
Keyword:Nitrogen efficiency;, fertilizer nitrogen, rice ammonium nitrogen, nitrogen balance
Faculty or Institute:Faculty of Agriculture
ID Code:2679
Deposited By: Nur Izyan Mohd Zaki
Deposited On:17 Nov 2009 01:07
Last Modified:27 May 2013 07:02

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 17 Nov 2009 01:07.

View statistics for "Recovery of Field-Applied Fertilizer Nitrogen by Rice"

Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.