Journal of Food, Agriculture and Environment

Vol 7, Issue 2,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Resources use efficiency of field grown transplanted rice (Oryza sativa L.) under irrigated semiarid environment


Shakeel Ahmad 1*, Ashfaq Ahmad 2, Muhammad Zia-ul-Haq 3, Hakoomat Ali 1, Tasneem Khaliq 2, Muhammad Akbar Anjum 1, Muhammad Azam Khan 1, Abid Hussain 2, Gerrit Hoogenboom 4

Recieved Date: 2008-11-30, Accepted Date: 2009-04-17


Resources use efficiency of rice crop was studied under irrigated semiarid conditions. Two field experiments were conducted at the Experimental Farm, University of Agriculture, Faisalabad (UAF), Pakistan (latitude 31º25´N, longitude 73º09´E, and altitude 184.4 m from sea level), for two years. Variables in the study include, viz. three population densities, five nitrogen fertilizer rates in the first experiment and similarly three population densities and five irrigation regimes in the second experiment. For these resources, radiation interception and radiation conversion efficiency (RCE = ε), water use and water use efficiency (WUE = w), agronomic nitrogen use efficiency (ANUE = an) and economic nitrogen use efficiency (ENUE = en) were estimated. Relationships were also studied among various resources. Particularly RCE (ε) and WUE (w) were estimated by two approaches. The results revealed in experiment that cumulative intercepted photosynthetically active radiation (CIPAR) varied from 990 to 1016 MJ m-2 in various nitrogen fertilizer levels. Plant density did not affect significantly RCE in both the seasons and it ranged from 1.26 to 1.28 g MJ-1 among different densities. Averaged over the two years data mean RCE for cumulative above-ground total dry matter (CATDM) ranged from 1.15 to 1.36 g MJ-1 among different fertilizer levels. The results depicted in Experiment 2 revealed that increasing density from one seedling hill-1 to three seedlings hill-1 significantly increased the CIPAR. Averaged over the two years data of RCE ranged from 1.41 to 1.44 g MJ-1. Increasing application of irrigation significantly and linearly enhanced RCE for CATDM ranging from 1.34 to 1.49 g MJ-1. Overall cumulative crop evapotranspiration (CCET) varied from 540 to 575 mm among different densities. Similarly CCET varied from 464 to 632 mm among different irrigation regimes. WUE varied from 23.1 to 23.7 kg ha-1 mm-1 among different densities. Averaged over the two seasons WUE for CATDM decreased with increasing application of irrigation and ranged from 25.2 to 21.9 kg ha-1 mm-1. The relationships between CATDM production and cumulative leaf area duration (CLAD) and CIPAR in Experiment 1 and CLAD, CIPAR and CCET in Experiment 2 were linear. Agronomic and economic nitrogen use efficiencies were higher at NF3 (N 150 kg ha-1).


Oryza sativa L., resources, nitrogen use efficiency, water use efficiency, radiation use efficiency, rice

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 487-492

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :