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Irrigation and Mulching Effect on Sweet Potato Yield

M. S. H. Choudhury
Dapartment of Horticulture, Bangladesh Agricultural University, Mymensing.

M.A. Siddique
Dapartment of Horticulture, Bangladesh Agricultural University, Mymensing.

M. G. Rabbani
Dapartment of Horticulture, Bangladesh Agricultural University, Mymensing.

Abstract/ Executive Summary:

Effect of irrigation and mulch on sweet potato varieties ' Kamalasundari' and ' Tripti' were compared in an experiment conducted at the Horticulture Farm of Bangladesh Agricultural University during rabi season of 1986-87. Both irrigation and mulching significantly influenced the yield and yield contributing characters. Increased yield (43.03 t/ha) was obtained with mulch. With the increase in frequency of irrigation (up to three irrigation at thirty days interval), the yield was enhanced. However, the highest yield (46.90 t/ha) was obtained from the treatment that included one irrigation at 30 days of planting followed by mulching. Variations were observed between two varieties in respect of yield and yield contributing characters. 'Kamalasundari' gave the highest yield (44.37 t/ha). No interaction was observed between variety and irrigation + mulch treatment.

Keywords: Sweet Potato, Irrigation, Mulching, Yield

Location: Horticulture Farm of Bangladesh Agricultural University, Mymensing.

Start Date: 00-00-1986

End Date: 00-00-1987

Program Area: Crop-Soil-Water Management

Commodity: Sweet potato

Objectives:

To study the effect of irrigation and mulching on Yield contributing characters and yield of sweet potato under Bangladesh Agricultural University Farm condition.

Methodology:

The experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensing during rabi season of 1986-87. The soil of the experimental field was sandy loam with pH 6.6. The experiment was laid out in split plot design with the six treatments each having.The interval of irrigation treatment was selected on the basis of the results reported by Anonymous (1983). In some treatments mulch was not used in order to compare the effects of mulch and irrigation frequencies. The average initial soil moisture content of the experimental plot was 28.2 %. The size of each unit plot was 3m x 2.4 m accommodating 40 plants. Tip cutting about 3o cm in length were planted on raised beds on 11 December, 1986 with the spacing of 60 cm x 30 cm. The plot was fertilizer at the rate of 10 tons cowdung, 140 kg urea, 100 kg triple superphosphate (TSP) and 150 kg muriate of potash (MP) per hectare. Full doses of cowdung and TSP were applied in the entire experimental plot at the time of land preparation. In case of non-irrigated plots, entire doses of urea and MP were applied at the time of planting and mixed properly with soil. While in other treatments where number of irrigation was 2 or more, urea and MP were applied in two installments equally at 30 and 60 days after planting. Irrigation was done by flooding the respective plots. Mulching was done by a layer of straw as per treatments. Data on number, length and weight of vines and number, weight and size of tubers were recorded at harvest from 10 randomly selected plants. The crop was harvested after 145 days of planting.

Source of Information: Bangladesh horticulture, 21(1):43-47, June 1993 (ISSN 0379-4288)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The result of the present experiment indicate that yield of sweet potato can be enhanced by providing three irrigation at 30 days interval under the climatic and soil conditions of Horticulture Farm, Bangladesh Agricultural University, Mymensing. However, from economic point of view irrigation beyond one may not be beneficial as sweet potato is considered as low value crop. Mulching also appears very effective as supplement of irrigation to retain soil moisture and to increase the yield of sweet potato.

Knowledge Management: Journal