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

Effect of Relative Time of Cyperus Rotundus Emergence on Fibre Yield and Competitive Ability of Olitorius Jute

S.M. Rezaul Karim
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Saiful Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A.A. Mamun
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The competitive ability of jute was measured as aggressivity. About 31% fibre yield was reduced due to the competition from the weed when grown together with jute irrespective of time of jute sowing. When the weeds emerged 10 days earlier than the crop, the yield was reduced by 37% and it was reduced by 16% when the weeds emerged 10 days later. The effect on total dry matter of jute was also more or less similar to fibre yield. The weed produced 2.73kg/m² of total dry matter (above ground + below-ground parts) in early-sown and 2.17kg/m² in late sown conditions irrespective of time of jute sowing. Weed dry matter was reduced by 35% due to competition with jute. The crop was most aggressive when it was grown early with late-sown weed and was least aggressive when grown as late-emerged crop with early-emerged weeds. The aggressivity of jute was 18% less when the weeds emerged 10 days earlier than early-sown jute and 35% less than late-sown jute. It increased by about 66% when the weeds emerged 10 days later than early-sown jute and by 47% than late-sown jute.

Keywords: Weed emergence, Cyperus rotundus, Olitorius Jute, Aggressivity, Fibre yield

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-05-1994

End Date: 00-09-1994

Program Area: Crop-Soil-Water Management

Commodity: Jute

Objectives:

To know the influence of early and late emergence of C. rotundus and jute relative to each other on the yield and competitive ability of the crop. This investigation was undertaken to know the effect of early or late-emerged weed (purple nutsedge) on the growth, yield and competitive ability of olitorius jute.

Methodology:

The olitorius jute (cv. O-4) was grown in pure stands and in mixture with nutsedge weed raised at different times relative to jute at Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh during the period from May to September, 1994. The treatments were: I) jute early- weed late, ii) jute early- weed early, iii) jute late- weed early, iv) jute late- weed late, v) jute early- weed free, vi) jute late- weed free, vii) weed early- jute free and viii) weed late- jute free. The treatments were allocated randomly within the blocks of a RCB design. The land was fertilized with cowdung, urea, triple super phosphate and muriate of potash at the rate of 3720, 112, 17 and 22kg ha^-1 respectively. Jute was sown in rows 30cm apart on 1^st May as early and 10th May as late sowing. The weed tubers were planted at the rate of 80/m² at 10 days early or late in relation to jute sowing. Thinning of jute seedling was done 15 days after the crop emergence to maintain the plant to plant distance of 10cm. The unsown weeds were removed from the plot time to time, to avoid the extra competition. The crop was harvested at 120 days after sowing when the crop was at a stage of 30% flowering. Underground parts of the weed and jute plants were collected and weight of total dry matter was recorded. Retting of jute was done in pond water and the fibre was dried properly to record the fibre yield. Competitive ability of jute was measured by aggressivity, the difference between relative yields of jute and the weed. The collected data were analyzed statistically using the “MSTAT” statistical programme and the mean differences were adjudged as per DMRT.

Source of Information: Journal of Agronomy, 1: 66-67, 2002; ISSN 1680-8207

Article Link (Online Journal): DOI: 10.3923/ja.2002.66.67; URL: http://scialert.net/abstract/?doi=ja.2002.66.67

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that olitorius jute should be free from nutsedge infestation from the beginning of its life span, especially early emergence (even 10 days earlier than crop) of the weed must be avoided to get adequate fibre yield of jute. In the area where nutsedge is a great problem for jute, the crop should make more competitive by sowing it comparatively earlier in the season.

Knowledge Management: Journal