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Major fruit crops production in Bangladesh and their relationships with socio-ecological vulnerabilities

Article Information

Jatish Chandra Biswas1, Md. Maniruzzaman2, Md Mozammel Haque3*, Md. Belal Hossain4, Abdul Hamid5, Naveen Kalra6

1Coordinator CRP-2 project, second phase, Krishi Gobeshona Foundation, Farmgate, Dhaka, Bangladesh

2Bangladesh Rice Research Institute, Joydebpur, Gazipur-1701, Bangladesh

3Bangladesh Rice Research Institute, Regional Station, Habiganj, Bangladesh

4Bangladesh Rice Research Institute, Joydebpur, Gazipur-1701, Bangladesh

5Agrarian Research Foundation, 5/10B, Block A, Lalmatia, Dhaka 1207, Bangladesh

6Adjunct Faculty, Systems Design Engineering, University of Waterloo, ON, Canada

*Corresponding Author: Md Mozammel Haque, Bangladesh Rice Research Institute, Regional Station, Habiganj, Bangladesh

Received: 16 May 2021; Accepted: 24 May 2021; Published: 16 June 2021

Citation:

Jatish Chandra Biswas, Md. Maniruzzaman, Md Mozammel Haque, Md. Belal Hossain, Abdul Hamid, Naveen Kalra. Major fruit crops production in Bangladesh and their relationships with socio-ecological vulnerabilities. Journal of Food Science and Nutrition Research 4 (2021): 131-143.

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Abstract

Many nutrient rich fruits are grown in Bangladesh, but consumption is less than half of the daily requirement. Such situations are worst depending on growing seasons, natural hazards and localities of the country. The climate extremes are increasing globally including Bangladesh and damaging crops severely. So, the impacts of climate extremes on fruit crop losses and socio-ecological vulnerability were investigated in the present investigation. The socio-ecological vulnerable zones were determined based on minimum of 10 attributes, arithmetic, geometric and weighted mean scores and maps were prepared using IDRISI3.2. Banana, mango, watermelon, pineapple, and jackfruit covered the highest areas in Bangladesh. Total fruit production varied from <20000 tons to >600000 tons depending on location of gardens and its size. North-east, south and south-east coastal regions of Bangladesh are moderate to very highly socio-ecologically vulnerable for fruit production. Most safe zones for fruit cultivation are situated in major hilly, parts of north-west and a few districts in central region in Bangladesh. Fruit crop area damages were the highest in Khulna division. Hailstorms were dominating hazards responsible for 28.83% losses followed by thunderstorms (14.73%), cyclone (14.54%) and salinity (10.86%). Based on economic losses, about 67% areas of the country are moderate to highly vulnerable for fruit cultivation. Major hilly, parts of north-west and part of central regions are safe for fruit production of country. Damages from climate extremes can be minimized by changing sowing times, selection of hazard tolerant varieties, making physical barriers, early warning for disaster preparedness and community based disaster management.

Keywords

Mango, Banana, Jackfruit; Climate extremes; Economic loss; Adaptation

Mango articles; Banana articles; Jackfruit articles; Climate extremes articles; Economic loss articles; Adaptation articles

Article Details

1. Introduction

Fruits of Bangladesh are important sources of antioxidants, vitamin, beta-carotene, iron, zinc, copper, manganese, etc, but the benefits from such vital sources are not utilized properly because of economic conditions and regional unavailability. On an average, people take 43.65 gm fruits per day (HIES 2010) as compared to 100 gm capita-1. Besides, the availability and quality of fruits reduce greatly for certain communities and localities depending on damages caused by natural hazards. For example, yield reductions were 20-4% with banana, watermelon, papaya, hog plum and guava in south and south-east Bangladesh because of erratic rainfall, drought, high temperature, salinity, tidal surge, waterlogging, cyclone, pests and diseases. Moreover, mango, banana, citrus, papaya, litchi, etc are vulnerable to physiological disorders like spongy tissue, chock throat, bumpy fruits, fruit cracking, respectively because of environmental stress. Fruit size also reduces because of drought and thus reduction in total production. Natural hazards like cyclone, flood, tornado, hailstorm, storm/tidal surge, drought, river bank erosion, intrusion, etc affect Bangladesh almost every year. Such natural calamities not only affect food production, household incomes in rural areas, but also cause increased occurrence of diseases that could intensified in future because of frequent episodic extreme climate events. Bangladesh ranks sixth most flood-prone country in the world that damages crops and properties significantly and thus adversely affects rural livelihoods. There could be a severe flood in every four to five years submerging more than three-fifth of the land. Cyclone hits Bangladesh coast almost every year in April-May or October-November of which a severe cyclone land the country in every three years. As a whole the frequencies and intensities of climate extremes have increased in the recent decades because of climate change impacts and thus causing severe damages to fruits and other crops in Bangladesh. Therefore, the objectives of the present investigation were to find out exposure and sensitivity of selected major fruit crops to natural hazards and delineation of socio-ecological vulnerable zones and its relationships with economical losses to provide future directions for adaptation strategies.

2. Materials and Methods

Data were collected from the Year Book of Agricultural Statistics, 2012 and 2016 and from other existing literatures. Data on economic losses of fruit crops during 2009-2014 and households affected by drought, flood, waterlogging, cyclone, tornado, storm/tidal surge, thunderstorm, river erosion, salinity, hailstorm, household income, disaster knowledge management, disaster preparedness, and drinking water unavailability were collected for analyses. Data have been collected from 64 districts following stratified two-stage random sampling technique. A total of 4945 mauzas/mahallas (the smallest administrative unit) were considered in the first stage and then 143980 households were selected for data collection. Pre-tested questionnaire was used in seven districts followed by necessary modifications for final data collection. Respondents to disaster preparedness, disaster knowledge management and drinking water unavailability were determined as followed:

% Respondent/HH = (Sample size engaged – Control)/Total sample size*100

Scoring criteria are shown in Tables 1-3. The highest score was assigned when damage was the least and the lowest score indicates the highest vulnerable zones. The socio-ecological vulnerable zones were determined based on weighted, geometric, arithmetic, and mean scores of selected attributes as determined by equations I, II, and III, respectively. Attribute-wise maps were prepared using IDRISI3.2.

WM = ((DRTscore)*(WLscore)*(TUSscore)*(ERscore))^1/4*0.1+ ((CYLscore)*(TORscore)* (TDSscore)* (DPRscore)*(DKMscore)*(HHIscore))^1/6*0.3+ ((SALsore)*(DWAscore)* (HSscore)*(FLscore))^1/4*0.2 …(I)

WM = weighted mean; DRT = Drought, WL = waterlogging, TUS = thunderstorm, ER = erosion CYL = cyclone, TOR = tornado, TDS = tidal surge, DPR = disaster preparedness, DKM = disaster knowledge management, HHI = household income, SAL = salinity, DWA = drinking water availability, HS = hailstorm and FL = flood

Geometric mean (GM) = (Attr1* Attr2*……..*Attr14)^(1/14) …………………… (II)

Arithmetic mean (AM) = (Sum of all attributes)/14 ……………………………... (III)

Potential exposure of fruit crops to climate extremes and/or natural hazards were delineated based on their growing seasons with probable occurrence times of episodic events.

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Table 1: Affected households and scoring criteria for different attributes and economic loss in fruit culture during 2009-20014, Bangladesh

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Table 2: Affected household (HH) number and scoring criteria for different attributes during 2009-20014, Bangladesh

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Table 3: Scoring criteria for salinity and hailstorm damage, disaster preparedness and knowledge management and total household income during 2009-1014, Bangladesh

3. Results and Discussion

3.1 Fruit production scenarios

Fruit gardens in the range of 1000-3000 ha covered the highest area (36.83%) followed by 3000-5000 ha (about 16.34% area) in different parts of the country (Figure 1a). The largest fruit garden (>15000 ha) are situated in the north-west part of the country. Total fruit production varied from <20000 tons to >600000 tons depending on location of gardens and its size (Figure 1b). Part of hilly areas (4.22% of the country) had the highest fruit production. In about 17-20% areas of the country, fruit productions were 20000-100000 tons. Many fruits are grown in Bangladesh of which banana (Musa paradisicum), mango (Mangifera indica), watermelon (Citrullus vulgaris), pineapple (Ananus sativus), jackfruit (Artocarpus heterophyllus), melon (Cucumis melo), guava (Psidium guava), khira (Cucumis sp), litchi (Litchi chinensis), green coconut (Cocos nucifera), lime-lemon (Citrus limonium & latofolia), papaya (Carica papaya) and ber (Zizypus mauritania) are dominant (Figure 2). In terms of area coverage, eight important fruit crops (ranking are in decreasing order) are banana> mango> watermelon> pineapple> jackfruit> guava> khira> litchi; but in terms of total production the rank of eight fruits are jackfruit>mango>banana>green coconut>water melon>guava>pineapple>papaya.

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Figure 1: Average total fruit (a) areas and (b) production in Bangladesh (BBS, 2017)

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Figure 2: Major fruit crop areas and production in Bangladesh

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Figure 3: Major fruit growing zones (only garden areas) in Bangladesh

Major growing areas of eight selected fruit crops are shown in Figure 3. Banana garden in the range of 300-700 ha covered about 25% of the country followed by 1000-2000 ha garden in about 21% areas. The largest banana garden (5000 ha) covered only about 4.12% of the country. Mango does not grow in every corners of the country; but hilly areas in the south-east of the country are the hotspot for mango cultivation. Mango garden of 100-300 ha covered the highest area (27.98%) followed by 10-100 ha garden covering 24.04% areas of the country. The largest mango garden (>5000 ha) covers only 3.48% areas. Pineapple gardens are mostly concentrates in hilly areas (500-3000 ha) and Madhupur Tracts (1000 ha to >3000 ha) covering about 25% and 12% areas, respectively of the country. Jackfruit garden in the range of 100-300 ha covers about 22% areas followed by 300-500 ha covering 16.12% areas of the country. The smallest (<10 ha) and the largest (>2000 ha) jackfruit gardens covered 7.03% and 1.32% areas, respectively of the country. Watermelon grows in large areas (500 ha to >3000 ha) in coastal districts covering about 20.67% areas of the country; its smaller sized gardens (<10 ha to 50 ha) distributed in different parts covering about 37% areas. Small (<7 ha to 60 ha), medium (60-400 ha) and large (400 ha) guava gardens covered 59.88%, 37.63% and 2.48% areas, respectively of the country. Dominant green coconut areas are in southern (160 ha to >500 ha sized gardens) and south-east (5-300 ha) parts of the country. Litchi dominantly grows in north-west (40 ha to >500 ha gardens) and south-east (40-180 ha) regions covering about 34.82% and 26.07% areas, respectively of the country.

3.2 Socio-ecological vulnerability

North-east, south and south-east coastal regions of Bangladesh are moderate to very highly socio-ecologically vulnerable based on all evaluation methods except geometric mean approach (Figure 4). With the exception of a few districts, northern parts of Bangladesh are also vulnerable to very highly vulnerable. Based on all evaluation methods, most safe zones are situated in major hilly areas, parts of north-west region and a few districts in central region of the country. Based on estimation, very highly, highly and vulnerable areas were as high as 26.60%, 26.22% and 27.33% of crop areas (13829116 ha), respectively. No or slightly socio-ecological vulnerable areas are only 4-26%.

3.3 Natural hazards and economic loss

Fruit crop area damages were the highest in Khulna division followed by Chittagong and Barisal divisions, respectively (Figure 5a). Area damages followed the decreasing order of Khulna> Chittagong> Barisal> Dhaka> Rajshahi>Rangpur>Sylhet divisions. Similar trends were observed for economic losses because of climate extremes. Hailstorms were dominating hazards responsible for 28.83% losses followed by thunderstorms (14.73%), cyclone (14.54%) and salinity (10.86%) and the least was by the erosion (Figure 5b). Damaging effects of tornado and drought were 9.3-9.8% and that of flood, waterlogging, storm/tidal surge were 2.9-4.7%. Based on economic losses caused by climate extremes, about 67% areas of the country were moderate to highly vulnerable for fruit cultivation during 2009-2014 (Fig. 6). The rest areas were safe or comparatively safe zones for fruit cultivation.

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Figure 4: Socio-ecological vulnerable areas in Bangladesh based on (a) minimum of 10 attributes, (b) arithmetic mean, (c) geometric mean and (d) weighted mean.

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Figure 5: Influence of natural hazards on (a) division wise fruit area and economic losses and (b) damaging contribution (%) during 2009-2014

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Figure 6: Fruit crop vulnerable zones in Bangladesh based on economic losses by natural hazards during 2009-2014

4. Discussions

Many tropical fruits are grown in Bangladesh and there are seasonal bounties in different parts of the country. Only five fruits dominate the country in terms of area coverages and their distribution vary depending on land and ecological suitability. So, total production from gardens and individual tress vary greatly among locations and thus the availability for consumption. Small gardens are more common in Bangladesh than larger one because of fragmented land holdings. Some fruit trees are seasonal and others are perennial and fruit bearing takes place in a particular time of the year and thus they exposed to different climate extremes. For example, banana, coconut, guava and papaya grow year-round and face different climate extremes based on fruit bearing times the crops (Figure 7). While on the other hand, pineapple, litchi, jackfruit and mango bear fruits in a particular season and so they are exposed to specific natural hazard(s). For example, litchi is exposed to tornado, hailstorm, thunderstorm and drought mostly because it grows in selected locations of the country in a particular season. On the other hand, mango grows almost every corner of the country and exposed to nine selected natural hazards (Figure 7).

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Figure 7: Exposure of selected fruits to different natural hazards during flowering to ripening stages

Shows probable occurrences times of climate extremes

Rectangles in different colors show sensitive stage based on reproduction stage of crops

Fruit plants may respond to avoid one or more stresses through morphological or biochemical mechanisms. Fruit shedding or reductions in size are the examples of coping mechanisms. Drought, a slow onset disaster is the single most important factor affecting world food security and it was the catalyst of great famine in the past. Bangladesh experienced severe droughts in 1951, 1957, 1961, 1972, 1976, 1979, 1986, 1989 and 1997 mostly occurring in pre-monsoon and post monsoon seasons depending on rainfall distribution pattern. Though drought is damaging for every living being, sometimes it helps in fruit bearing. For example, drought reduced vegetative flushes and mango malformation along with enhanced flower bud formation. Besides, water and oxygen are needed in sufficient quantity for growth and development. Drought not only affects agriculture, it also influences social life. Sometimes conflicts arise among neighbor because of water scarcity. In some areas crop fields have transformed into orchard for cultivation of mango, jujube and guava. Such practices are governed by many factors of which economy of the produce is the major driving force. Farmers generally apply supplemental irrigation water in many cases to minimize drought effects. Salinity imposes an initial water deficit that results from the relatively high solute concentrations in soil resulting in ion specific stresses of K+/Na+ ratios and leads to a buildup in Na+ and Cl- concentrations, which are detrimental to plants. Salinity affects plant growth and development in various ways through its impact on photosynthesis, water relations and nutrient absorption. If salt concentration exceeds threshold level, growth rate and size of plants decreased progressively along with reduced fruit yield. Banana, lemon, mango and orange are susceptible to salinity but coconut and guavas are moderately tolerant. Papaya shows variable sensitivity to salinity. Socio-ecological vulnerability largely depends on household income, knowledge on disaster management, disaster preparedness and occurrences and intensities of natural hazards. Mymensingh, Sylhet, Dhaka, Comilla and parts of Rangpur and Khulna regions are river-flooded zones in Bangladesh. So, under extreme flooded conditions like flood on 1998 would reduce fruit production considerably. In north-eastern Bangladesh, flash flood in April to November and water stagnation are the causes of socio-ecological vulnerabilities. As economy is one of the driving forces, it helps in preventing damages and recovery after natural havoc. We have found low income in Mymensingh, Barisal, Rangpur, etc areas where socio-ecological vulnerability is high. Alamgir et al. also reported the highest poverty rate in Mymensingh and Barisal and the lowest in Rajshahi areas. Based on geographic locations and considering other factors, the least or no fruit crop vulnerabilities were observed in Chapai Nawabganj district under Rajshahi division and most part of hilly areas of the country (Figures 4a, 4b). Wisner et al. also reported that if a community is characterized by social and economic development, vulnerability is minimized along with enhanced capacity of disaster management. Disaster mitigation policies need to be based on improving human experiences to natural hazards, not on relief activities after calamities. Moreover, development of disaster mitigation programs based on increasing adaptive capacity and reducing biological sensitivity to natural hazards can be effective strategy. Depending on types of hazards and intensities, losses in total fruit production and economic damages take place. Besides, hazards frequencies vary depending on locations of the country (Figure 8) and thus crop losses also vary. Frequencies of climate extremes are more than 50% in about 36% areas of the country. So, it is obvious that crop damages are inevitable in Bangladesh. Options remain for the growers are to plan cropping in such a way that at least some of the calamites can be avoided. Selection of tolerant/resistant varieties against climate extremes and making physical barriers for certain events like netting of litchi trees for preventing hailstorm damages are important. However, community based disaster management would be better option because socially and economically marginalized communities are more vulnerable to natural disasters. Lack of fundamental knowledge on cyclones and tidal surge along with financial capabilities of the communities make it difficult for mitigation of damages. So, damages caused by climate extreme could be reduced by awareness builds up and disaster preparedness among social communities.

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Figure 8: Climate extreme frequencies in different regions of Bangladesh

5. Conclusion

Considering area coverage, banana, mango, watermelon, pineapple, jackfruit, guava, khira and litchi are the dominant fruit crops in Bangladesh and they exposed to different natural hazards depending on growing seasons. The impacts of climate extremes on major fruit crop losses and socio-ecological vulnerability were investigated based on selected parameters that can be extended for exhaustive study at Upazilla (small administrative unit of a district) level. Since total fruit production from gardens and individual tress vary greatly among locations, proper distribution is essential for nutritional security of in the country. Although the country is disaster prone, major hilly areas, parts of north-west region and a few districts in central region of the country are safe for fruit production. However, damages from climate extremes in other parts of the country can be minimized by changing sowing times, selection of hazard tolerant/resistant varieties, making physical barriers, early warning for disaster preparedness and community based disaster management. Disaster mitigation policies should be based on improving human experiences to natural hazards, not on relief activities after calamities. Moreover, development of disaster mitigation programs based on increasing adaptive capacity and reducing biological sensitivity to natural hazards can be effective strategy. Community based disaster management would be better option because socially and economically marginalized communities are more vulnerable to natural disasters.

Acknowledgement

The research was partially funded by Krishi Gobeshona Foundation through CRP-II project.

Author’s contribution

Jatish Chandra Biswas, Md. Mozammel Haque and Md. Belal Hossain were involved in data collection. Jatish Chandra Biswas, Md. Maniruzzaman and Abdul Hamid analyzed data, performed mapping activities, and prepared the manuscript.

Conflicts of Interest

The authors declare no conflict of interest.

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