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

Addition of Organic Matter Through Sesbania Rostrata Relay Cropping in Rice-rice Farming System

N.S. Choudhury
Khamarkunja, Bangladesh Agricultural University, Mymensingh 2202

M.S.U. Bhuiy
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202

S. Yasmin
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202

K.A. Hoque
Khamarkunja, Bangladesh Agricultural University, Mymensingh 2202

Abstract/ Executive Summary:

A mechanism was tried to develop and enrich soil organic matter and to sustain productivity of the ricerice cropping systems through its in-built biomass production from Sesbania rostrata as a relay crop. In order to develop such mechanism a number of field experiments were conducted with the participation of farmers during 1993 to 1996. Findings revealed that relay cropping of S. rostrata did not affect significantly the yields of aus and boro rice indicating its sustainability to fit it into the system. The relay cropping of S. rostrata could add up to 35.97 t ha-1 of green biomass to the soil depending upon treatments.'Incorporation of 15 to 17.5 t ha-1 of S. rostrata green biomass was as pood as application of 80 kg N ha -1 for rice yield. Post-harvest soil analysis data indicated that 25 t ha- green biomass of S. rostrata was necessary to maintain the current status of soil organic matter.

Keywords: Ecology, Sustainable, Sesbania rosttata

Location: In the farmers' fields at Kazirshimla site and on the station, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date: 00-00-1993

End Date: 00-00-1996

Program Area: Crop-Soil-Water Management

Commodity: Dhaincha, Farming System

Objectives:

S. rostrata propagates through seeds, seedling and stem cutting (Hossain et al, (1990) and thrives well in mist and waterlogged soils. Considering the above advantages an attempt was undertaken with the objective of developing mechanism to enrich soil organic matter and to sustain the productivity of rice-rice cropping systems through biomass production from S .rostrata.

Methodology:

Seven experiments were conducted in the farmers' fields at Kazirshimla site and on station, Bangladesh Agricultural University, Mymensingh, Bangladesh during 1993 to 1996. The experiments were set up in randomized complete block design with five replications. The unit plot size varied from 20 sq. to 100 sq. m. according to farmers' land availability. The soils of different experimental plots were analyzed before transplanting of rice and after crop harvest to determine the organic matter status. • Two experiments were conducted during the period from March to December 1993, in Aus rice (BR6)- Transplant aman rice (BR11) cropping pattern, S. aculeate and S. rostrata were relayed with us rice at different planting arrangements -25 cm x 20 cm, 50 cm x 20 cm and no Sesbania (rice sole). Top cuttings of Sesbania were planted in between rice rows before panicle emergence of Aus rice as per experimental treatment. The same pieces of land were used for the second experiment in Aman rice season. Sesbania was incorporated in Aus rice field after 45 days of planting. Green manuring in situ and in vitro were practiced in Transplant aman rice field to incorporate the same amount of Sesbania (17.51 ha-1) in each plot. The treatments included in the experiment were SR, SR-M25%, N50%, SR+N100% and no urea application i.e. control.

Seven experiments were conducted in the farmers' fields at Kazirshimla site and on station, Bangladesh Agricultural University, Mymensingh, Bangladesh during 1993 to 1996. The experiments were set up in randomized complete block design with five replications. The unit plot size varied from 20 sq. to 100 sq. m. according to farmers' land availability. The soils of different experimental plots were analyzed before transplanting of rice and after crop harvest to determine the organic matter status. • Two experiments were conducted during the period from March to December 1993, in Aus rice (BR6)- Transplant Aman rice (BR11) cropping pattern, S. aculeate and S. rostrata were relayed with us rice at different planting arrangements -25 cm x 20 cm, 50 cm x 20 cm and no Sesbania (rice sole). Top cuttings of Sesbania were planted in between rice rows before panicle emergence of Aus rice as per experimental treatment. The same pieces of land were used for the second experiment in Aman rice season. Sesbania was incorporated in Aus rice field after 45 days of planting. Green manuring in situ and in vitro were practiced in the Transplant Aman rice field to incorporate the same amount of Sesbania (17.51 ha-1) in each plot. The treatments included in the experiment were SR, SR-M25%, N50%, SR+N100% and no urea application i.e. control.

In 1996 experiments were conducted during March to December. S. rostrata was relayed with Aus rice (BR2) by sowing seeds, transplanting seedling and planting cuttings. Sesbania thus grown was used as green manure for succeeding Transplant aman rice. The experimental treatments were control, Sowing seeds Of S. rostrata between two rows, Sowings seeds of S. rostrata two rows interval, Transplanting seedlings of S. rostrata between two rows interval Planting cutting of S. rostrata between two rows and Planting cuttings of S. rostrata after two rows interval with five farmers replications. Seeds were sown at 48 days after sowing of Aus rice. Seedling and cutting of 50 cm long S. rostrata were transplanted and planted, respectively, at 86 days after sowing of Aus rice. The standing S. rostrata plants were cut down after harvesting Aus rice and incorporated into the soil of the respective plots. Total incorporated biomass was recorded and these were treated as experimental treatments of the following experiment. The S. rostrata biomass incorporated ranged from 5.20 to 11.46 t ha-1.

Source of Information: J. Bangladesh Agri!. Univ. 2(2): 231-235, 2004 ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The relay cropping of S. rostrata could add up to 35.97 t ha-1 of green biomass to the soil depending upon treatments.'Incorporation of 15 to 17.5 t ha-1 of S. rostrata green biomass was as pood as application of 80 kg N ha -1 for rice yield. Post harvest soil analysis data indicated that 25 t ha- green biomass of S. rostrata was necessary to maintain the current status of soil organic matter.

Knowledge Management: Journal