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Potentiality of Water Chestnut (trapa Natans) in Aquaculture of Bangladesh

Md. Kabir Hossain*
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

S.M. Rahmatullah
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The study was conducted to know the contribution of water chestnut (Trapa natans) in the aquaculture of Bangladesh. The study were also performed to know the general biology of the plant, propagation process, growth performance, culture system, problems, harvesting system, per decimal (dec) production etc. Data were collected from four upazilas under four districts for eight months from April to November 2017. Traditional culture system was included in this research work that was practiced by the farmers in our country. During the study some food items were made with water chestnut flour, such as cake, halua, morobba and raw water chestnut was used to make different types of curry. Chemical analysis showed that the moisture content were 96.67%, 90.35%; lipid were 1.20%, 1.65%; protein were 0.30%, 0.94%; carbohydrate were 0.50%, 5.38%; ash were 0.18%, 0.64% and fiber were 1.15%, 1.05%, respectively for green and red water chestnut. The marketing channels from farmers to consumers were passed through a number of intermediaries such as local water chestnut traders (paikers), wholesalers and retailers. The cost-benefit ratio was varied from one farmer to another because of their culture systems, economic capability, labor cost, disease, ownership of land etc. The production cost was BDT 80/dec and benefit was BDT 220/dec in one case, however for other farmer the production cost was BDT 100/dec and benefit was BDT 506.25 for second cases. Improved traditional culture system was used for second cases so farmers got high profit. If these culture systems are expanded throughout the country especially in flood plain region, farmers will get extra benefit from their land. In Bangladesh, agricultural crops frequently damaged due to flood. If water chestnut in these flood affected land is cultured, farmers will recover their investment and get extra benefit.

Keywords: Water chestnut, Transplant, Proximate composition, Marketing channel

Location: Islampur upazila, Jamalpur; Bhaluka upazila, Mymensingh; Tala upazila, Satkhira; Hail Hoar, Sreemangal upazila, Moulvibazar and Field Laboratory Complex, Bangladesh Agricultural University (BAU), Mymensingh.

Start Date: 00-04-2017

End Date: 00-11-2017

Program Area: Crop-Soil-Water Management

Commodity: Water chestnut

Objectives:

The present study was conducted to know the contribution of water chestnut in the aquaculture of Bangladesh. The study were also aimed to know the general biology of the plant, propagation process, growth performance, culture system, problems, harvesting system, per decimal (dec) production in Bangladesh.

Methodology:

Study period and area: The study was conducted for a period of eight months from April to November, 2017. Data were collected through investigation of hoar, beel, pond and personal interview from different areas, such as Islampur upazila, Jamalpur; Bhaluka upazila, Mymensingh; Tala upazila, Satkhira; Hail Hoar, Sreemangal upazila, Moulvibazar and Field Laboratory Complex, Bangladesh Agricultural University (BAU), Mymensingh. Target group In the study area, a group of fishermen, fish farmer, shopkeeper, water chestnut harvester, public representative, day labor etc. were reported the traditional culture technique of water chestnut. Experienced persons were selected for interviewing. They were selected by general people of the study areas. Preparation of interview schedule In order to get a complete picture to fulfill the objectives of the study, a draft interview schedule was prepared. Then the interview schedule was pretested in the study area. Attention was paid to incorporate any new information, which was not designed to be asked and filled in the draft interview schedule. The interview schedule was then modified, changed and rearranged according to the experience gathered from the pre-test. The final schedule was developed in logical sequence so that the water chestnut harvester could answer chronologically. The schedule included various questions related to water chestnut culture technique, transplanting system, harvesting system, fertilizing system, per dec production, per plant production, problems of water chestnut culture, marketing system and the impacts on other aquatic weeds and fish. Collection of data During collection of data, both primary and secondary sources were considered. Primary data were collected from respondents by the researcher himself. Several visits were made to the study area to collect accurate information related to objectives of the study through interview schedule. For the study, a combination of individual interview, such as focus group discussions (FGD) and key informant interviews were used for collecting the data from the respondents. Sample collection Water chestnut plants were collected from the study areas to transplant in pond of Field Laboratory Complex for close observation. Transplantation For the observation, some water chestnut plants were transplanted in the Field Laboratory Complex, BAU to know the growth performance, spreading pattern, leaves pattern, problems of water chestnut culture, suitability of soil, per dec production, per plants production and other relevant data. Nutrient value analysis Nutrient value was analyzed in nutrition laboratory to know the percentage of moisture, protein, fat and carbohydrate for two different varieties which was collected from different study areas.

Source of Information: International Journal of Natural and Social Sciences, 2020, 7(2): 77-87 ISSN: 2313-4461 & 2617-6637

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Water chestnut is a floating plant with submerged roots anchored with soil which grows in shallow water fields, ponds, lake, beels and flood plain. It is a good source of nutrition and the whole plant has various positive pharmacological effects. It is delicious and contains carbohydrates, proteins and essential minerals and is reported to be used in many Ayurveda preparations as diuretic, aphrodisiac, nutrient, appetizer, astringent, coolant, antidiarrheal and tonic. They are also useful in lumbago, sore throat, bilious affections, bronchitis, fatigues & inflammation. Though these fruit has great benefits as food and medicine, it is used as vegetable in many countries and flour also used to make delicious food like cake, halua, ruti, puri etc. Many people do not know about it in our country. So they do not know about the multipurpose uses of water chestnut. If the culture system is expanded throughout the country especially in flood plain region, farmers will get extra benefit from their land. In our country, flood visits frequently and damages a lot of agricultural crops. If we can culture water chestnut in these flood affected land, farmers will recover their investment and they can get extra benefit.

Knowledge Management: Journal