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Tree Crop Interface Study at Varying Levels of Tree Densities at Rars Jamalpur

Monjur Ahmed
Regional Agricultural Research Station, BARI, Jamalpur.

M F U Mia
Regional Agricultural Research Station, BARI, Jamalpur.

M Biswas
Regional Agricultural Research Station, BARI, Jamalpur.

A A Begum
Regional Agricultural Research Station, BARI, Jamalpur.

M A Rahman
Regional Agricultural Research Station, BARI, Jamalpur.

Abstract/ Executive Summary:

An experiment was initiated in tree crop interface system at RARS, Jamalpur from 1997 -98 to 2000-01 with planting of 3 tree species and 3 planting spacing in RCB design. The cropping pattern broadcast Aus(L)-Blackgram (L)-Wheat (Kanchan) followed in the interspaces of tree species in four consecutive years. Both spacing and species has considerable effect on the grain yield of the crops. Akashmony and sissoo affected the crop yield due to higher competition compared to mahogany. Minimum competition was observed in mahogany due to its slow growth habit. It was a long-term experiment and it needs further investigation to come up with a final recommendation.

Keywords: Tree densities, Interspaces, Performance

Location: Regional Agricultural Research Station, Jamalpur.

Start Date: 01-09-1997

End Date: 30-08-2001

Program Area: Farming System

Non-commodity: Performance

Objectives:

1.To assess crop yield in the interspaces

2.To see their performance as affected by tree species and spacing.

Methodology:

The experiment was carried out at the Regional Agricultural Research Station, Jamalpur from 1997-98 to 2000-01. Treatments comprising of three tree spacing (4 x 6 m, 8 x 10 m and 12 x 14 m) and three tree species viz, sissoo (Dalbergja sissoo), akashmony (Acada auriculiiormis) and mahogany (Swetenja macrophylla). Tree species saplings were planted in the 13^th September 1995 and treatments were imposed during 1997. The treatments were assigned in a RCB design with three replications having unit plot size of 24 x 28 m. The spacing of the saplings was 4 x 6 m (24 saplings/plot), 8 x 10 m (9 saplings/plot) and 12 x 14 m (4 saplings/plot). The cropping pattern B.aus (L)-Blackgram (L)-Wheat (cv. Kanchan) were grown in the interspaces of tree species and completed 4 consecutive years. Local variety of B. aus grown during the initial years and in the fourth year B.aus (cv. BR21) was sown. Recommended doses of fertilizers (BARC, 1997) were applied. The tree species were pruned at 395, 1200 and 1778 days after planting (DAP) of saplings. Samples were taken from the pruned leaves and branches of trees were oven dried for 72 hours under 70⁰C. Grain yields of the crops, tree height, diameter and dry matter of leaves and branches of trees were taken and analyzed statistically and means were separated by LSD Test.

Source of Information: Proceedings of a national workshop held September 16-17 2001 in Gazipur, Bangladesh.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the study conclusion may be drawn that both tree species and spacing have considerable effect on the grain yield of the seasonal crops. This is a long-term experiment and it needs further verification to give a final recommendation.

Knowledge Management: Report/Proceedings