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Field Performance of True Potato Seed Tuberlets as Influenced by Size and Harvesting Period

Tuhin Suvra Roy
Professor
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207.

Md. Ashraful Islam Pulok
Seed Technology Discipline, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207.

Md. Mahfuzar Rahman
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207.

Md. Nazmul Haque
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207.

Sudip Chakrabortty
Department of Agronomy, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207.

Abstract/ Executive Summary:

A field experiment was conducted in the research field of Sher-e-Bangla Agricultural University, Dhaka, during the period from November 2012 to April 2013 to investigate the effect of seed tuber size and harvesting time on morpho-physiological characters, yield attributes and yield of potato. The experiment comprised of four different size of seed tubers, viz., 28-<45 mm, 20-<28 mm, 10-<20 mm and <10 mm and four harvesting time, viz., 70 days after planting (DAP), 80 DAP, 90 DAP and 100 DAP. The experiment was laid out in randomized complete block design factorial with three replications. The growth parameters such as stems hill^-1, leaves hill^-1, tuber yield plot^-1, marketable yield plot^-1 and tuber yield ha^-1 were significantly influenced by the seed tuber size and harvesting time. Results revealed that in general, plant height, stems hill^-1 increased with increasing seed tuber size but yield attributes and yield increased with 28-<45 mm tuber size. The highest tuber yield hectare was recorded on the tuber size of 28-<45 mm due to increase of tubers hill^-1 and tuber yield plot^-1. In contrast, the lowest tuber yield ha^-1 was recorded in the smaller seed tuber of <10 mm. Results showed that stems and leaves hill^-1 and tubers hill^-1, single tuber weight and tuber weight plot^-1 increased with increasing time of harvest upto 90 DAP. The highest number of stems and leaves hill^-1, tubers hill^-1, single tuber weight and tuber weight plot^-1 were observed in the harvesting time 90 DAP and the lowest in harvesting time 70 DAP. However, the highest gross tuber yield ha^-1 was observed in the harvesting time 90 DAP and the lowest was recorded in 70 DAP. For combined effect of seed tuber size and harvesting time, the highest gross tuber yield was observed in the treatment combination of 20-<28 mm seed tuber with the harvesting time of 90 DAP which was economically adventitious

Keywords: Bari TPS-II, Seedling tuber, Harvesting period, Bulking pattern,Yield.

Location: Sher-e-Bangla Agricultural University, Dhaka

Start Date: 00-11-2012

End Date: 00-04-2013

Program Area: Seed Technology

Commodity: Potato

Objectives:

To find out the effect of tuber size on growth and yield of potato;
To find out the optimum harvesting time in order to get a higher yield of good quality tubers and
To study the combined effect of tuber size and harvesting time on growth, yield and economic return of potato.

Methodology:

The experiment was carried out at the experiment of field, Sher-e-Bangla Agricultural University, Dhaka, during the period from Nov ember, 2012 to April, 2013. The veriety BARI TPS-II seed will be collected from Tuber Crops Research Centre, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur. Two factors were included in the study as mention : four Seedling tuber size of 28-<45 mm(S₁), 20-<28 mm(S₂), 10-<20 mm(S₃) and <10 mm(S₄) and harvesting time of 70 DAP(D₁), 80 DAP(D₂), 90 DAP (D₃) and 100 DAP(D₄). The two factor experiment was laid out in a randomized complete block design (Factorial) with three replication. The size of each unit plot was 4.0 m × 2.5 m. The doses of fertilizers were 320, 232, 285, 120, 10 and 10 kg ha^-1 for urea, TSP, MoP, gypsum, zinc oxide and boric acid, respectively. Rotten cowdung @ 10,000 kg ha^-1 was applied 10 days before final land preparation.Planting was done on November 10, 2010. Hill to hill distance was maintained for 20 cm in the experiment. After emergence of seedlings, irrigation, thinning and gap filling, weeding and mulching earthing up and top dressing was done. Furadan 5G @ 20 kg ha^-1 was applied during final preparation of the main field to prevent the crops and tubers from the soil insects. Harvesting of the crop was started at 70 DAP, and continued up to 100 DAP as per the harvest treatment having an interval of 10 days.

Data were collected on plant height (cm), number of stem hill^-1, number of leaves plant^-1, dry matter plant^-1(g), number of tubers hill^-1, weight of tubers hill^-1, gross yield of tubers plot^-1 and hectare^-1, marketable yield of tubers plot^-1 and hectare^-1 and seed yield. The collected data were analyzed statistically following the analysis of variance technique and the mean differences were adjudged with Duncan’s Multiple Range Test (DMRT) using the statistical computer package program, MSTAT-C.

Source of Information: INTERNATIONAL JOURNAL OF BUSINESS, SOCIAL AND SCIENTIFIC RESEARCH, ISSN: 2309-7892, Volume: 2, Issue: 1, Page: 79-85, July-September, 2014

Article Link (Online Journal): http://www.ijbssr.com/currentissueview/14013052

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Based on the experimental results, it may be concluded that the effect of seed tuber size and harvesting time had a positive effect on morphological and growth characters, yield attributes and yield in potato and the tuber size of 20-<28 mm with 90 DAP harvest seems to be more suitable for getting higher tuber yield for BARI TPS-II.

Knowledge Management: Journal