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

Balance Sheet of Available Potassium in Forage Cropping System of the Old Brahmaputra Floodplain Soil

M.AZIZUR RAHMAN
Agronomy Division. BARI, Gazipur.

S. M. A HOSSAIN
Agronomy Division. BARI, Gazipur.

M. A GAFFER
Agronomy Division. BARI, Gazipur.

A. M. M. TAREQUE
Agronomy Division. BARI, Gazipur.

Abstract/ Executive Summary:

Six forage cropping systems were included in lhe predominant partially irrigated cropping system T. aman-boro of lhe Old Brahmaputra Floodplain alluvial silt-loam soil to work out a balance sheet of potassiumum after six consecutive intensive cropping systems during 1991-93 at the Regional Agricultural Research Station. Jamalpur. Bangladesh. The initial soil K was 168- 172 kg/ ha. About 66.5 to 99.5 kg/ ha/yr of K was added from muriate of potash. The uptake of K ranged from 132.6 to 268.0 kg/ ha having 102% more uptake during the first year. The uptake increased upto 84% (298.4 kg/ ha /yr) of the added K in the following year. Cereal dominating system removed more K and among leguminous forage T. aman- berseem-boro had the highest. . Potassium uptake of forage crop raised to 12 J .2 kg/ ha in oat+berseem and grasspea was the poorest in K uptake. Forage succeeding boro rice removed more K. More positive improvement in K uptake was also noticed in the second forage residual T. aman. Positive K balance was observed in both the years and more gain was observed in the second year.

Keywords: Balance sheet, Forage crop, Cropping system succeeding crop. Residual effect

Location:

Start Date: 00-00-1991

End Date: 00-00-1993

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To work out a balance sheet of potassium after six consecutive intensive cropping systems

Methodology:

The field experiment was carried out through 1991- 1993 cropping seasons under partially irrigated conditions in the medium high land of the Regional Agricultural Research Station, Jamalpur, Bangladesh under the Old Brahamaputra Flood plain to work out a balance sheet of the available potassium in the soil in forage cropping system. The soil of the experimental field was silt loam of Sonatala series having pH 5.95, organic matter 1 .86%, available P 30 kg/ ha and K 168 kg/ ha. The design of the experiment was randomized complete block and replicated four times. The plot size was 6m x 5m. Forage crops were included in the predominantnant cropping system, T.aman (high yield ing photoperiod sensitive rice varieties planted. in July-August and harvested in November-December)-boro (photoperiod insensitive rice varieties transplanted in January-February and harvested in May- June) in the post-monsoon wet to dry transition period before boro. Bora, BR14, was grown under irrigated condition. Forage crops were grown u nder resid ual soil moistu re and T. aman. BR l 1, was under rainfed condition. The forage crops were grasspea ( Lathyrus sativas L.). sunhemp ( Crotalaria j uncea L.). cowpea (Vigna unguiculata L. Walp.). mustard (Brassica sp.). Berseem (Trifolium alexandrinum L.). maize (Zea may s L.) and oat (Avena sativa L.). Both the rice crops received 33.25 kg K/ ha each and the potassium applied to each crop in the cropping system . Nitrogen and P205 at the rate of 80-60 kg/ ha were applied to boro, T. aman, forage mustard + maize and oat+berseem. Only berseem received 60 kg P205/ ha. The other forage crops were not fertilized. Soil samples for the study was collected from top 15 cm layer before starting of the experiment as well as after every crop harvest. After each crop harvest representative plant samples were collected. The soils were analyzed for potassium by standard method.

Source of Information: J . Asial. Soc. Bangladesh, Sci. 25l l) : 81-86, l 999

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It is revealed from the study that potassium uptake increased , higher positive K balance was registered , and increase of available K was also noticed with the inclusion of forage crops in the traditional rice-rice system.

Knowledge Management: Journal