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 Root Growth and Root Characteristics of Wheat on a Clay Terrace Soil of Bangladesh

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

Abstract/ Executive Summary:

A field research was conducted at the university farm of Bangabandhu Sheikh Mujibur Ralunan Agricultural University, Bangladesh, during November 1997 to March 1998 in order to study the effects of irrigation and nitrogen fertilization on the root growth and root characteristics 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 remarkable impact on root length density, root weight density and root-to-shoot ratio of wheat. Root length density and root diameter in the surface layer increased with the increasing level of irrigation or N application. Root growth in the subsurface layers increased when either irrigation or N application was limited while the other was in the optimum level. Root-to-shoot ratio was negatively correlated with the frequency and amount of irrigation and N application. Higher frequency of irrigation has remarkably reduced soil strength in the surface layer, but N application could not create any impact on it.

Keywords: Wheat, Root growth, Root length, RLD and RWD

Location: Research farm of BSMR-Agril University (24.05' N;90.16' E and 8.4 m elev.)

Start Date: 01-11-1997

End Date: 30-03-1999

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

Examine the effect of irrigation and N fertilization on root growth characteristics of wheat. Clarify the plant growth and grain yield as a function of root growth.

Methodology:

The experiment was done at the research farm of BSMRAU, Gazipur, Bangladesh during November 1997 to March 1999. The soil, climate, test crop, experimental design, fertilizer application, sowing of seeds, and cultural operations of the experiment, and statistical analysis were mentioned in the paper 9155. In addition growth analysis of roots was studied once at the dough stage (90 DAS). For that the plant roots with soil were collected from a selected hill of individual treatment by driving vertically a core sampler in three soil layers of 0-10, 10-20 and 20-30 cm depths. The weight of the root samples was noted immediately after cleaning and then the fresh root samples was preserved in refrigerator. Sub samples were stained with methyl-violet before 24 hr of measuring the length and area of roots using root scanner (Model: NVM12,Japan). before taking the The equipment was calibrated using weir of the known length and area for measuring root length and root area, respectively. Root diameter, Root length density (RLD) and Root weight density (RWD) was calculated using the standard method and equations.

Source of Information: J. Fac. Agr., Kyushu Univ., 45 (1):301-308(2000).

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Wheat root responds remarkably to both irrigation and N application. Root length density and root diameter at the surface layer increase with the increasing level of irrigation and N application. Root weight density increases slightly with increasing frequency of irrigation, but the increment becomes significantly high by applying N up to 120 kg ha-1. Root-to-shoot ratio decreases with the increasing level of irrigation and N application. Root growth in the subsurface layers increases when one of the factors (irrigation or N) is limited while the other is in the optimum level.

Knowledge Management: Journal