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Effect of Planting Methods and Spacings on the Growth and Yield of Sweet Potato

A. M. Farooque
Department of Horticulture, Bangladesh Agricultural University, Mymensingh.

M. G. Maruf
Department of Horticulture, Bangladesh Agricultural University, Mymensingh.

M. A. Rahim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh.

Abstract/ Executive Summary:

The effects of three different planting methods, viz. flat, ridge and trench, and four levels of spacings, viz, 91.44cm X 76 20cm, 76.20cm X 60,96cm, 76.20cm X 45.72cm and 60.96cm X 30.48cm were studied on sweet potato. The trench method gave the highest yield (64.50 t/ha) followed by ridge (55.10 t/ha) and flat methods (50.90 t/ha). Wider spacings increased vine growth but reduced the number of tuberous root per plant Closer planting increased the yield of tuberous root per hectare. The trench method with closest spacing (60.96cm X 30.48cm) appeared to be the best for the production of sweet potato under the experimental conditions.

Keywords: Planting methods, Spacings, Growth, Yield, Sweet potato

Location: Horticulture Farm, Bangladesh Agricultural University, Mymensingh

Start Date: 01-11-1981

End Date: 30-04-1982

Program Area: Crop-Soil-Water Management

Commodity: Sweet potato

Objectives:

To investigate the effect of planting methods and plant spacings on the growth and yield of sweet potato under Bangladesh conditions.

Methodology:

The experiment was conducted at the Horticulture Farm, Bangladesh Agricultural University, Mymensingh during the period from November 1981 to April 1982. The soil of the experimental plot was sandy loam. The experiment consisted of 3 methods of planting and 4 levels of spacings. The methods of planting were; (i) flat method- vines were planted on flat and levelled land,(ii) ridge method- vines were planted on prepared ridges about 20 cm high and (iii) trench method- vines were planted in the trench 20cm deep. The spacings were, 91.44cm X 76.20cm, 76.20cm X 60.96cm, 76.20cm X 45.72cm and 6096cm X 3048cm. The cultivar of sweet potato under investigation was ACC.6. developed by the Philippines Root Crop Research and Training Centre (PRCRTC). This cultivar has been preliminarily selected for growing in Bangladesh Anonymous, (1981). The crop was planted on 25 November, 1981 and harvested on 15 April, 1932 Cowdung and phosphorus @ 10 t/ha and 40 kg P₂O₅/ ha, respectively, were applied as basal dose before planting. Nitrogen and potash 60kg N/ha and 90 kg k₂O/ha respectively were applied in two instalments after 30 and 60 days of planting. The factorial experiment was laid out in the randomized complete block design with three replications. The size of unit plot was 366m X 3.05m, which accommodated 60, 32, 24 and 16 plants at the spacings of 60.96cm X 30.48cm, 76.20cm X 45.72cm, 76.20cm X 60.96cm and 91.44 cm X 76.20cm, respectively.

Source of Information: Bangladesh Hort.,11(1), pp:11-14,1983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The trench method gave the highest yield (64.50 t/ha) followed by ridge (55.10 t/ha) and flat methods (50.90 t/ha). Wider spacing increased vine growth but reduced the number of tuberous root per plant Closer planting increased the yield of tuberous root per hectare. The trench method with closest spacing (60.96cm X 30.48cm) appeared to be the best for the production of sweet potato under the experimental conditions. The results of the present experiment suggest that a close planting in the trench method is optimal for the production of sweet potato in the sandy loam soils of Bangladesh.

Knowledge Management: Journal