Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effects of Irrigation and Nitrogen Fertilization on Nitrogen Uptake and Nitrogen Use Efficiency of Wheat

Dr. Md. Ataur Rahman
Principal Scientific Officer
Regional Wheat Research CentreBangladesh Agricultural InstituteGazipur 1701

Abstract/ Executive Summary:

A field research was conducted at the university farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh, during November 1997 to March 1999 in order to study the effects of irrigation and nitrogen fertilization on the uptake of nitrogen and nitrogen use efficiency of wheat. The experiment was executed in the split-plot design comprising the combination of the five levels of irrigation arranged as a main plot and the four rates of N application distributed to a sub-plot. The treatments for the study were the same as before. Both irrigation and N application have created a significant impact on N content, N uptake, and N use efficiency in wheat. The N content and N uptake of wheat were increased significantly by providing two to three irrigations having irrigation at the grain filling stage (80 days after sowing). Nitrogen application up to 120 kg/ha also increased the N content and N uptake of wheat. The N content in wheat grain was found to be highly correlated with the leaf N content at the different growth stages. A negative relationship existed between N use efficiency of wheat and rates of nitrogen application.

Keywords: Nitrogen wheat, NUE

Location: Bangabandhu Seikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 01-11-1997

End Date: 30-03-1999

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

Unpredictable influence of climatic and soil conditions resulted in lower NUE of rice and many other field crops including wheat. With increase in applied N fertilizer, agronomic efficiency usually declines. The present study was carried out to examine the effects of irrigation and N fertilization on N uptake and NUE of wheat on a clay terrace soil of Bangladesh.

Methodology:

This is the third part of the study reported in paper no 9155 and 9179 thus the field experimentation methodology was similar. In addition nitrogen uptake by plants, nitrogen use efficiency (NUE) were studied in this part. N uptake by leaves was calculated from weight of leaves (kg/ha) and the leaf N content. Similarly, straw and grain N uptakes were calculated by their weights with respective N contents. Total N uptake by wheat is the summation of N uptake by straw and grain. NUE was calculated as the ratio of grain yield (kg/ha) to total N uptake (kg/ha) by wheat for a particular treatment.

Source of Information: J. Fac. Agr., Kyushu Univ., 45(1):309-316(2000).

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Experimental findings demonstrated that the N content and N uptake in wheat increase with the inclusion of irrigation at the grain filling stage. Nitrogen application up to 120 kg/ha also increases the N content and uptake of wheat. The N content in wheat grains is highly correlated with the leaf N content at different growth stages.A negative relation ship exists between NUE of wheat and the rate of N application.

Knowledge Management: Journal