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Growth and Harvestable Maturity of Red Amaranth at Different Sowing Dates

S.R. Saha
Horticulture Research Centre (HRC), Bangladesh Agriculture Research Institute, Gazipur-1701, Bangladesh.

M. Nazim Uddin
Horticulture Research Centre (HRC), Bangladesh Agriculture Research Institute, Gazipur-1701, Bangladesh.

M.A. Rahman
Horticulture Research Centre (HRC), Bangladesh Agriculture Research Institute, Gazipur-1701, Bangladesh.

S.M. Sharifuzzaman
Horticulture Research Centre (HRC), Bangladesh Agriculture Research Institute, Gazipur-1701, Bangladesh.

A.K.M. Anwar Habib
Horticulture Research Centre (HRC), Bangladesh Agriculture Research Institute, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

A study was conducted to optimize the time of sowing and stage of harvest of red amaranth during winter season to obtain higher yield without loss of palatability. It was observed that in November sowing, highest palatability (1.59) was achieved when harvested at 15 DAS. Harvesting at 20 days after sowing (DAS) was found to be suitable for November sowing considering economic yield as well as palatability. In December sowing had moderate palatability with leaf-stem ration 1.38. On the other hand, in January sowing when harvested at 30 DAS expressed acceptable leaf-stem ration (1.71). Therefore, considering yield and optimum palatability, harvesting of the crop should be done at 25 DAS in December sowing and 30 DAS in January sowing.

Keywords: Red amaranth, Growth, Harvestable maturity, Palatability

Location: Central Research Station of HRC, BARI, Joydebpur

Start Date: 00-11-1995

End Date: 00-02-1996

Program Area: Crop-Soil-Water Management

Commodity: Red amaranth

Objectives:

To find out the optimum harvestable stage to get maximum yield without being sacrificing the palatability.

Methodology:

An experiment was conducted at the Central Research Station of HRC, BARI, Joydebpur from November 1995 to February 1996. The experiment was laid out in a RCB (Factorial) design with three replications. The red amaranth variety BARI Lal sak-1 was included in this study. Unit plot size was 3.25 x 2.00 m². Seeds were sown on the every month starting from November 1995 to January 1996. The different sowing dates were considered as three levels of one factor and five different stages of harvest at each sowing were considered as five levels of the other factor. Seeds were sown in plots maintaining 20 x 5 cm² spacing. Initially, continuous broadcasting of seeds was done in lines. Subsequently plants were thinned maintaining 5 cm plant to plant spacing. The crop was fertilized cowdung, TSP, Urea and MP were applied as basal doses during final land preparation. Irrigation and other cultural operations were done as and when needed. Twenty plants were selected from each plot for recording data omitting border effects and following the destructive sampling rule of physiological study. The different parameters were plant height, total plant weight, length and breadth of the largest leaf and partitioning of the plant into its components like leaf, stem and root. Leaf-stem ratio was also calculated to get optimum palatability stage. Incidentally November sowing had only four harvests up to flower initiation. Therefore, considering four stages of harvest in November sowing as four treatments, the analysis was accomplished in a RCB design. While the other two sowings viz. December and January with five harvests level each were analyzed statistically in a factorial RCB design. While the other two sowing viz. December and January with five harvest levels were analyzed statistically in a factorial RCB design. Mean separation was done following Duncan’s multiple range test (DMRT).

Source of Information: Asian Journal of Plant Sciences, 2: 431-433, 2003 (ISSN 1682-3974)

Article Link (Online Journal): http://scialert.net/fulltext/?doi=ajps.2003.431.433&org=11

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It is concluded that red amaranth should be harvested 25 and 30 DAS in December and January sowing respectively.

Knowledge Management: Journal