ABSTRACT

Shrimp is one of the export items in Bangladesh. The total production of shrimp and prawn has been raised from 1.60 lakh MT in 2002-03 to 2.54 lakh MT in 2017-18. Day by day, the production and promotion of shrimp aquaculture practices have increased by developing numerous programs and projects. This study was conducted on three shrimp culture practices system of Traditional, Improved traditional and Semi-intensive farming system in Paikgacha, Khulna District. Data were randomly collected from fish farmers of each culture practices through personal interviews. The culture period was typically four months from March to July for Penaeusmonodon (local name-Bagda). The optimal range of the physio-chemical parameters (Temperature, Dissolved oxygen, Biological Oxygen Demand, Salinity, Alkalinity, and Transparency) required to monitoring the health and increasing growth of shrimps. The average production from traditional shrimp farm, improved traditional and semi-intensive farm were approximately 100-150, 100-500 and 500 to 4000 kg/ha/yr. Based on the experiment as well as we found that the Semi-intensive shrimp cultural practice is more effective and it had proved that the physio-chemical conditions of Semi-intensive shrimp farming are comparatively standard than traditional and Improved traditional farming system.

Key words: Shrimp aquaculture practices, physiochemical parameters, impacts, management approaches

ABSTRACT

A study was conducted on saline tolerant vegetables with their mineral constituents for nutritional security during July 2020 to June 2021. Edible portions of bottle gourd, sweet gourd, sponge gourd, snake gourd and ridge gourd were collected from three selected locations of Borguna and Patuakhali districts. The locations were Sawdagarpara of Borguna district as well as Pakhimara of Khepupara upazilla and Dumki of Patuakhali district. It is noted that the soils of Borguna generally contains high saline in dry season; but during the sampling period the soil at Sawdagarpara observed moderately saline (EC value 6.2 dS m^-1) and this might be due to high rainfall during the study year. The vegetable were analyzed for P, K, Ca, Mg and S. In saline area cooperatively lower accumulation of P and higher accumulations of K, Ca, Mg and S were found in most of the vegetable than that of non-saline area. Therefore, the discussed vegetable could be grown in saline area for sufficient mineral compositions. Considering the achieved findings the studied vegetables can tolerate moderate salinity (soil EC value up to 6.2dSm^-1) and they can be recommended to grow commercially in the study area for nutritional security. The trend of minerals accumulation in most of the vegetable was Ca>Mg>P>K>S. On the basis of total minerals content the trend of vegetable was found as bottle gourd>ridge gourd>snake gourd>sponge gourd> sweet gourd. 

Key words: Salinity, vine vegetable crops, coastal region

ABSTRACT

The present research was conducted at the farmer’s field of Pabna during Aman season 2020-21 to investigate the growth and yield performance of rice mutants. The experiment was arranged in a randomized complete block design consisting of two rice mutants (viz. Kas-80-C-1, RM-16-N-8, BINA dhan-17 and BRRI dhan-87) as treatment and replicated thrice. All the growth, yield attributes and yield were substantially influence among the rice mutants except the phenological parameters. Results of the experiment showed that the highest plant height in BRRI dhan-87 (134.33 cm) and BINA dhan-17 was found better in respect of maximum seed yield (6.5 ton/ha). Therefore, findings of this study suggested that BINA dhan-17 would be suitable for better productivity and recommended for cultivation at Pabna region in Bangladesh.

Key words: Yield, rice, mutants.