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Suitability Assessment of Orange Fleshed Sweet Potato Varieties at Northern Region of Bangladesh

M.M. Hossain
International Potato Center, Banani, Dhaka, Bangladesh

S. Heck
International Potato Center, Banani, Dhaka, Bangladesh

D. Chanda
International Potato Center, Banani, Dhaka, Bangladesh

E.H.M.S. Rahaman
International Potato Center, Banani, Dhaka, Bangladesh

M.F. Uddin
International Potato Center, Banani, Dhaka, Bangladesh

M.M. Hasan
Gana Unnayan Kendra (GUK), Gaibandha, Bangladesh

M.H. Kabir
Sher-E-Bangla Agricultural University, Sher-E-Bangla Nagar, Dhaka, Bangladesh

Abstract/ Executive Summary:

The present experiment was conducted with four Bangladesh Agricultural Research Institute (BARI) released orange-fleshed sweet potato varieties and a local cultivar as check at Sadar Upazila of Gaibanda and Pirgachha Upazila of Rangpur district during 2019-20 cropping season for their suitability assessment. It was found that all yield and yield contributing characters varied significantly at both locations. Due to higher adaptability in northern conditions, it was observed that the variety of BARI SP-12 produced the highest yield (39.63 ton/ha at Gaibandha and 30.02 t/ha at Rangpur) followed by BARI SP-8 (32.03 ton/ha at Gaibandha and 25.93 t/ha at Rangpur) while the lowest was recorded in BARI SP-15 (13.33 ton/ha at Gaibandha and 3.03 ton/ha at Rangpur). Considering locations, all the studied varieties performed better at Gaibandha than Rangpur district. The crop was evaluated at the vegetative and harvesting stage at the farmers’ field by the farmers, researchers and extension staff. At the harvesting stage, evaluation results revealed that BARI SP-8 ranked first at Gaibandha and BARI SP-12 at Rangpur while BARI SP-4 ranked (2nd) at both locations. During harvesting stage evaluation, participants preferred BARI SP-12 as at both locations followed by BARI SP-8 at Gaibandha and BARI SP-4 at Rangpur. Through organoleptic test BARI SP-4 and BARI SP-12 found good to excellent by the farmers, researchers and extension staffs.

Keywords: Sweet potato, Evaluation, Organoleptic test.

Location: Bangladesh Agricultural Research Institute

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Variety and Species

Commodity: Sweet potato

Objectives:

To identify some suitable varieties which will be accepted by the farmers of northern districts of Bangladesh.

Methodology:

The present experiment was carried out at Sadar Upazila (sub-district) of Gaibandha and Pirgachha Upazila of Rangpur districts during the 2019-20 cropping season. Four BARI released sweet potato varieties viz. BARI SP- 4, BARI SP-8, BARI SP-12 and BARI SP-15 along with a local cultivar as check were included in this study. Vines were collected from TCRC, BARI and planted on 26 November 2019 at Sadar, Gaibandha and 15 December 2020 at Pirgachha, Rangpur, having a plot size of 3.0m x 3.0m with 3 replications following Randomized Complete Block Design (RCBD). Fertilizers were applied in the experimental plots at the rate of 70-25-90- 15-2-2 kg/ha of N-P-K-S-B-Zn as a source of Urea, TSP, MP, Gypsum, Boric Acid and Zinc Sulphate, respectively. Weeding, irrigation, earthing-up and other intercultural operations were done as and when necessary. The sweet potato was harvested on 25 March 2020 and 14 April 2020 at Sadar, Gaibandha and Pirgachha, Rangpur, respectively. All the studied sweet potato varieties were evaluated in vegetative and harvesting stages following PVS method developed by Staff de Hann of CIP (Wangchuk et al., 2015). After 90 days of planting, vegetative stage evaluation was done. Harvesting stage evaluation followed by organoleptic evaluation was done at 120 DAP. Before evaluation of each stage (Vegetative and harvest), the method was explained properly. For the evaluation, a panel of fifteen participants (5 male farmers, 5 female farmers and 5 researchers & extension personnel were made. The participants of the group provided their opinions to select the best varieties. Due to COVID-19 situation, all farmers, researchers and staff were instructed to wear masks and use sanitizers in the field and maintained social distancing. Forgiving votes, two different types of seeds had been provided to the participants for segregating male or female participants. Six seeds were given to each individual for voting. Among them, three seeds were used for first priority vote, two for the second and one for the third position for each criterion. Only three criteria/varieties they had to choose in all phases of evaluation. After computation of votes, it was termed as a global score. According to the global score order of importance was made, and the first three characters/varieties were selected. Evaluation at the time of vegetative stage At the vegetative stage, first of all, the participants mentioned some criteria which they wanted to be in the upcoming sweet potato varieties. All the criteria were listed, and individual voting had been made for the specific characters. After voting, three criteria were selected on the basis of the highest score. After selecting the criteria, participants visited the sweet potato field and observed the vegetative growth stage of the varieties. After observation, all participants had given their votes to select three varieties. Evaluation at the time of harvesting stage At the time of harvest, again fifteen participants were gathered and initially selected some harvesting stage criteria which they are expecting in the upcoming variety. Then they had given their votes to select the best three harvesting criteria from the initially selected criteria. After criteria selection, all the participants visited the harvested field of sweet potato and observed yield and tuberous root characters. After observation, they gave their opinions as a vote for the best three varieties.

Source of Information: International Journal of Agriculture, Environment and Bioresearch; Vol. 5, No. 06; 2020

Article Link (Online Journal): https://doi.org/10.35410/IJAEB.2020.5597

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above studies, it was observed that BARI SP-12 performed well in the northern district compare to other varieties. Considering vegetative and harvesting stage evaluation participants’ (farmers and researchers) choice also went to BARI SP-12 at both locations. But in organoleptic evaluation, participants preferred BARI SP-4 as the best one followed by BARI SP-12. Considering the overall performance of the studied varieties, it may be concluded that BARI-SP-12 and BARI SP-8 have higher adaptability under northern districts and BARI SP-15 is very sensitive to cooler weather which is not well adapted in these areas.

Knowledge Management: Journal