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Fruit Setting in Seedless Lemon as Influenced by Irrigation and Mulch in the Hilly Region

Z.A. Firoz
Agricultural Research Station, Khagrachari, Bangladesh

M.M.U. Chowdhury
Agricultural Research Station, Ramgarh, Khagrachari - 4440, Bangladesh

A.K. Choudhury
Agricultural Research Station, Raikhali, Chandraghona - 4531, Bangladesh.

A. Afzal
Pulses Research Station, BARI, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to study the effect of five levels of irrigation (0, 10, 20, 30 and 40 litres/plant/fortnight) and mulching (mulch and no mulch) on the yield of seedless lemon at the Agricultural Research Station, Raikhali, Rangamati Hill Tracts during 1991-1992 and 1992-199 3. The plants receiving 40 litres of water per plant per fortnight produced the highest yield (25.8 kg/plant and 16.3 t/ha), Significantly higher yield (23.3 kg/plant and 14.6 t/ha) was recorded from the mulched plants. Plants receiving 40 litres of water with mulch produced significantly better economic yield.

Keywords: Seedless lemon, Citrus, Fruit yield, Irrigation, Mulch,

Location: Agricultural Research Station, BARI, Raikhali, Rangamati

Start Date: 00-10-1991

End Date: 00-10-1993

Program Area: Crop-Soil-Water Management

Commodity: Lemon

Objectives:

To find out the response of seedless lemon to different levels of irrigation and mulch.

Methodology:

The experiment was conducted at the Agricultural Research Station, Raikhali, Rangamati during November to October, 1991 - 92 and 1992 - 93. There were ten treatment combinations consisting of five levels of irrigation (0, 10, 20, 30 and 40 litres of water) with or without mulch. The measured amount of water was applied at 15- day intervals during the dry season (November to March of each season) following the treatments. From the study the annual rain of the previous years, it was observed that rainfall was distributed during summer, the rainy season and autumn with a well defined dry season from November to March. In case of mulch treatment, dried rice straw was used at 6 kg/plant in November, 1991 and 1992. Straws and leaves are considered better mulching materials. This is why straw was used as a mulching material in this experiment. The experiment was laid out in RCBD (factorial) with three replications. The plants used for this study were eight years old. There were four plants per treatment and they were spaced 4 meter apart from plant to plant and row to row. Fertilizers were used at the rate of 10 kg cowdung, 200 g N (from urea), 200 g P₂O₅(from triple superphosphate) 2 5 and 180 g K₂O (from muriate of potash) per plant 2 per year. Manure and fertilizers were applied in two equal installments in October and April each year. Intercultural operations were done as and when necessary. For determining fruit set and fruit drop percentage, 50 flowers were tagged in each tree from all directions at the time of flowering. After 30 days, the number of fruits were recorded and percentage of fruit set was determined. Harvesting started from December 20 and continued up to October 30 in each year. The data on fruit size (length and diameter), fruit weight, number of fruits/plant, yield per plant and per hectare were recorded and pool data of two years were analyzed statistically. Gross return, additional return over control and benefit cost ratio (BCR) were computed as well.

Source of Information: Thai J. Agric. Sci. 32(1) : 1-7, 1999

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Total Budget (Tk.) :

Achievement/Findings:

Plants receiving 40 litres of water with mulch produced highest yield (25.8 kg/plant and 16.3 t/ha) and significantly better economic yield in Chittagong Hill Tracts.

Knowledge Management: Journal