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Evaluation on Growth and Yield of Sweetpotato Genotypes in Ramgarh Soil Series of Low Hills in Sylhet

MAS Hossain*
Soil Resource Development Institute, Soil Testing Division, Dhaka-1215, Bangladesh

AFMS Islam
Dept. of Crop Botany and Tea Production Technology, Sylhet Agricultural University

MNH Miah
Dept. of Agronomy and Haor Agriculture, Sylhet Agricultural University

MMH Khan
Dept. of Biochemistry and Chemistry, Sylhet Agricultural University, Sylhet-3100

Abstract/ Executive Summary:

Sweet potato is a fast growing starchy root crop. It can be grown on a wide variety of soils. Soils of Sylhet region are classified into various soil series or soil groups. Several indigenous sweet potato genotypes are distributed in Sylhet region. So far they are not being explored. From this point of view, the present study was conducted to evaluate the growth and yield performance of nine sweet potato genotypes namely Local-1, Local-2, local-5, Local-8, Exotic-1, Exotic-2, Exotic-3, Exotic-4 and BARI SP-4. The evaluation was carried out on Ramgarh soil of North-Eastern Piedmont plains during November 2015 to March 2016 in a Randomized Complete Block Design with three replications. Morphology of leaves, vines, fibrous roots and storage roots as well as yield determinants were studied. Correlation study between morphological and yield attributes were also carried out. Correlation study revealed that primary vine number, total fresh weight, total dry matter, harvest index, storage root number plant-1, diameter of storage roots, fresh weight of storage roots were positively correlated with yield. The highest harvest index (HI)was observed in Local-1 (69.46%). The maximum number of storage roots plant-1 was in Exotic-2 (7.20). The longest storage roots were in Local-5 (14.13 cm) and thickest storage roots were inLocal-8 (5.22 cm). The highest storage roots fresh weight plant-1 was obtained from Local-1 (826.10 g). The highest storage roots yield was in Local-1 (48.96 t ha^-1) followed by Local-8 (42.60 t ha^-1). It can be concluded that Local-1 and Local-8 would be suitable for higher yield whereas potentials of Local-2 and Exotic-3 suggested for further investigation.

Keywords: Morphology, Storage root, Dry matter partitioning, Harvest index, Ramgarh soil series.

Location: Sylhet Agricultural University Farm, Tilagorh, Sylhet

Start Date: 00-11-2015

End Date: 00-03-2016

Program Area: Variety and Species

Commodity: Sweet potato

Objectives:

The experiment was conducted to evaluate the growth and yield performance of the genotypes, and to correlate the morphological and yield attributes with yield of the sweet potato genotypes.

Methodology:

The experiment was conducted at Sylhet Agricultural University Farm, Tilagorh, Sylhet during November 2015 to March 2016. Four local genotypes viz. Local-1, Local-2, Local-5 and Local-8, four exotic genotypes viz. Exotic-1, Exotic-2, Exotic-3 and Exotic-4 and a check variety BARI SP-4 were used as planting materials. Local genotypes were collected from different places of Sylhet region. Exotic genotypes were collected from Japan via Sylhet Agricultural University and BARI SP-4 from Bangladesh Agricultural Research Insitute, Gazipur. Soil samples were collected from the field, analyzed and characterized as per procedures of SRDI (2013). Fertilizer rate was calculated on soil test basis. After tillage, dolomite was applied @ 988 kg ha-1to minimize soil acidity. Applied cowdung, Urea, TSP, MoP, Gypsum, Zinc sulfate (Hepta), Solubor and Magnesium sulfate were 5000, 212, 186, 187, 63, 9, 3 and 84 kg ha-1, respectively. Urea and MoP were applied in two splits. Half of Urea and MoP, and other fertilizers and cowdung were applied as basal during final land preparation. Remaining Urea and MoP were applied as side dressing at 30 days after planting during earthing up operation. Experimental field was divided into three blocks for three replications and each block was further divided into nine plots resulting 27 plots. Apicalvine cuttings were planted on the beds with maintaining 0.60 m row to row, 0.30 m plant to plant and 0.60 m plot to plot distances following Randomized complete block design with three replications. Weeding, irrigation and other intercultural operations were done as and when necessary. Data collection and observations were started after 45 days of planting. Leaf length and breadth, petiole length, individual leaf area was taken at 60, 90, 120 and 150 days after planting (DAP) following the guidelines of CIP (1991). Yield and yield attributes were taken at final harvest (150 DAP). Collected data were analyzed through ANOVA technique and mean separation was done by Duncan’s Multiple Range Test (DMRT) using MSTATC computer software.

Source of Information: J. Sylhet Agril. Univ. 5(1):19 -30, 2018 ISSN: 2308-1597

Article Link (Online Journal): www.jsau.com.bd

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Genotypes Local-1 and Local-8 were performed better at Ramgarh soil series. Primary vine number, total fresh weight, total dry matter, harvest index, number of storage roots, diameter of storage roots, storage roots fresh weight were positively correlated with yield. It can be concluded that Local-1 and Local-8 to be suitable for low hill ranges of Sylhet region

Knowledge Management: Journal