The experiment was conducted at Bilpar village under the Saidergaon union of Chatok upazila of Sunamganj district from November 2016 to May 2017 to find out the effects of TSP fertilizer on the nutrient uptakes in boro rice and soil properties in haor areas. Two factors experiment- varieties: BRRI dhan29 and BRRI dhan58 and six TSP fertilizer levels: Fi- 85 kg TSP ha”! (Farmers’ practice), F,- 142 kg TSP ha”, Fs- 127 kg TSP ha”, F,- 112 kg TSP ha™ (BARC recommended dose), Fs- 97 kg TSP ha, Fq-82 kg TSP ha” were included in the experiment, which laid out in a randomized complete block design (RCBD) with three replications. The grain, and straw nutrients (NPKS) were analyzed using standard ‘methods. Initial and post-harvest soil analyses were done for pH, organic matter, total nitrogen, available P, exchangeable K and available S. Between two rice varieties, BRRI dhan58 showed higher nutrient content and uptake in comparison compared to BRRI dhan29. TSP fertilizer significantly influenced nutrient concentration in grain and straw as well as nutrient uptakes. BARC recommended TSP fertilizer (TSP-112 kg ha™) helps to uptake nutrients (P) superiorly in grain and straw. The soil analyses showed that the nutrient contents in post-harvest soils were higher compared to the initial soil. The application of TSP fertilizer along with Urea, MoP and Gypsum increased total N, available P, K, and S contents in post-harvest soil. The result revealed that cultivation of BRRI dhan58 with 112 kg TSP ha (BARC recommended dose) was the best option for rice production and maintaining soil fertility.

Keywords: TSP, Rice, Soil fertility, Nutrient uptake

The environmental stresses such as salinity (soil or water) are serious obstacles for field crops especially in the arid and semi-arid tracts of the world. In order to investigate impact of salinity stress on rice seed germination and early seedling stage conducted at glasshouse and biotechnology laboratory of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh-2200. A total number of 80 rice germplasms were used to evaluate for salinity tolerance at seedling stage following IRRI standard protocol. Hydroponic system was used to evaluate salt tolerance of these germplasms using nutrient solution and controlled environment. The modified standard evaluation system (SES) of IRRI was used to score the discriminate of the tolerant, moderately tolerant and susceptible rice lines. Scoring was done at 12th, 18th, 30th day after salinization. Among the germplasms, 12 were found as salt tolerant, 13 were found as moderately tolerant, 26 were susceptible and 29 were highly susceptible. The plant height, root length and total dry matter (TDM) weight are greatly affected by the salinity. Considering percent reduction in plant height, root length and total dry matter weight, it can be concluded that Hogla, Patnai, Jamai Naru, FL378, Bazra Muri and Jota Balam were tolerant.

Keywords: Rice, salinity, seedling

A field experiment was conducted at the field of Regional station of Bangladesh Rice Research Institute (BRRI), Habigonj, during the period from December 2012 to May 2013 to evaluate the effect of NKS nutrients on the growth and yield of BRRI dhan29. The experiment was laid out in a randomized complete block design with three replications. The experiment was consisted with six treatments viz., N85P35K50S9, P38K50S9(-N), N85P38S9(-K), N85P38K50(-S), P38S9(-NK) and N0P0K0S0 (control). Results of the experiment indicated that N, K and S nutrients alone or in combination with each other significantly affected the growth, yield and yield contributing characters of BRRI dhan29. Grain and straw yields were obtained highest in N85P38K50S9 (8.40 and 10.10 t ha-1) and the lowest in P38S9 (-NK) (5.50 and 6.50 t ha-1) which was supported by the data obtained in different growth and yield contributing characters, respectively.

Keywords: Rice, NKS nutrients, growth, yield

This study was designed to determine the costs, returns and relative profitability of BR-28, BR-29 and Hybrid Hira rice production. A total of 90 farmers out of which 30 producing each were selected randomly from three villages of Nageswari Upazila of Kurigram district in Bangladesh. It revealed that cultivation of BR-28, BR-29 and Hybrid Hira was a profitable business from the viewpoint of farmers. Analysis of costs and returns showed that variable cost was found to be higher for BR-28 variety. The return per hectare above variable cost for BR-28 was found Tk 44764.26 while for BR-29 and Hybrid Hira variety, it was Tk 53290.24 and 64305.62, respectively. Total cost per hectare for BR-28 was Tk 92635.04 and for BR-29 and for Hybrid Hira variety, it was Tk 92464.07 and 86160.81, respectively. Return above total cost for Hybrid Hira was found higher than BR-28 and BR-29 varieties. Therefore, production of Hybrid Hira was found more profitable compared to BR-28 and BR-29. It was observed from Cobb-Douglas production function that most of the included variables had significant impact on rice production. The study also identified some problems faced by the farmers and they were more severe for the production of Hybrid Hira variety compared to HYV’s BR-28 and BR-29 varieties. The study, therefore, suggests for taking some measures to solve the problems in order to expand production of selected rice varieties in the study areas as well as other parts of the country.

Keywords: Rice, production costs, returns, profitability