BJPST: 15(2): 031-038 [July, 2017] ISSN: 2305-1809 (Online version)
An investigation was carried out on eight genotypes of cotton where four genotypes were under the species Gossypium hirsutum and another four species from Gossypium barbadense. Since the fiber quality of Gossypium barbadense (Egyptian cotton) is superior to Gossypium hirsutum (American cotton), so an attempted was undertaken to produce interspecific hybrids with a view to incorporate desirable traits from both the species. Before going to operate hybridization program, the parental lines were evaluated for different morpho-physiological characters. The mean values of seed cotton yield were higher in American cotton than that of Egyptian cotton. The mean squares (ms) were significant for all the selected characters, indicated ample variation among the eight genotypes for the selected characters. The highest CV (%) against plant height at harvest suggested that plant height in cotton was highly sensitive to environmental conditions. Among the four genotypes under American cotton (Gosypium hirsutum) JA-08/E produced the highest seed cotton yield (116.2 g/plant) whereas, among the four genotypes under Egyptian cotton (Gossypium barbadense) JA-10/202 produced the highest seed cotton yield of 81.37 g plant-1. Hence, the yield potential of American cotton is higher than that of Egyptian cotton in our country, Different genetic parameters were estimated on 12 characters, where the highest heritability was measured for days to 50% flowering (95.02%) but none of the characters showed high heritability coupled with high genetic gain as percentage of mean. High heritability along with high genetic advanced provide better response selection expected in next generation. A set of 28 experimental hybrids were produced in a half diallel fashion from 8x7 cross combinations. Number of fruit set was lower as compared to number of bud emasculated followed by pollination because of environmental and physiological causes. The crossability estimated 100% for the cross. JA-08/A x JA-12/203. The segregants derive from this cross might result super quality cotton varieties suitable for our country. Since the requirement raw cotton is high but area under production is little, desirable hybrids or inbred varieties must be needed to fulfill the demand of the farmers of the country.
BJPST: 15(2): 025-030 [July, 2017] ISSN: 2305-1809 (Online version)
This experiment was conducted during the Boro season of 2016-2017 at Rajpat, Kashiyani to evaluate the performance of BRRI Prilled Urea Applicator (BPUA) and urea (N) fertilizer deep placement for long duration rice variety of BRRI dhan29. The treatments were T1 = Urea deep placement by BPUA (70% urea fertilizer of recommended dose), T2 = Urea deep placement by BPUA (80% urea fertilizer of recommended dose), T3 = Hand broadcasting (Recommended dose of urea @ 270 kg ha-1) and T4 = Control (-N). Both actual and theoretical field capacity found less for operation of the machine at 20% saving of fertilizer due to frequent inputs of fertilizer in the hopper of the applicator. Field efficiency of the applicator was 59 and 53% for operation at 30 and 20% saving, respectively. Actual saving percentage of urea fertilizer was noted 34 and 24% in the field against the calibration of 30 and 20% of saving. From 45 to 105 days after transplanting, plant height did not vary with the mode and rate of urea fertilizer application. However, there was no significance difference of plant height and number of tillers between70 and 80% of recommended dose of urea fertilizer application in the non-oxidize zone by the BPUA. Deep placement of the urea fertilizer (70 and 80% of recommended dose) gave significantly higher yield (6.7-6.8 t ha-1) compared to hand broadcasting of urea (6.1 t ha-1). Straw yield did not vary with the mode and rate of fertilizer. Harvest index was also found similar irrespective of treatments. The agronomic efficiency and partial factor productivity for N observed higher in urea fertilizer deep placement field compared to broadcasting whereas both the parameters did not varied for 30 and 20% saving rate. However, panicles hill-1 and filled grains per panicle did also not vary with the mode and rate of urea application while it was significantly higher than that of control. BPUA accounted the highest BCR (1.72 and 1.67) for 80 and 70% of the recommended urea fertilizer application in non-oxidized zone to the hand broadcasting of urea fertilizer (1.56). Farmer can apply 80% of urea fertilizer in non-oxidized zone by the BPUA for long duration rice variety.
BJPST: 15(2): 019-024 [July, 2017]
ISSN: 2305-1809 (Online version)
A lab experiment was conducted at Gazipur during April to November, 2011 with the objective to find out the suitability of seeds (harvested on 102 and 110 days after sowing) for storing and the efficiency of the storage containers on retention of seed quality. The experiment was tested in completely randomized design and consisted of five storage containers viz. earthen pot, cloth bag, plastic can, polyethylene bag and aluminum foil packet. The coriander variety was BARI dhania 1. For every two months (60 days) intervals observations were conducted to evaluate the results. The vapor proof containers maintained germination above minimum seed certification standard up to eight months and plastic can and polyethylene up to 6 months where as cloth bag up to 4 months. Seed moisture content of seed was lower in aluminum foil and plastic container. The electrical conductivity values were significantly lower in vapor proof packing materials compared to vapor pervious containers. Seeds packed in aluminum foil pack exhibited higher vigor index compared to cloth bag and earthen pot. The brown colored seed showed the best performance in all seed quality aspect than yellow colored seed.
Selim_Seed quality Corrected
BJPST: 15(2): 013-018 [July, 2017]
ISSN: 2305-1809 (Online version)
A field experiment was carried out at Gazipur during the rabi season of 2009-10 to find out the contribution of macro fertilizers (N, P, K and S) along with cow dung on the yield of coriander (BARI dhania 1) (Coriandrum sativum) and to evaluate the economic return of coriander. The experiment consisted of four of each N levels (0, 40, 80 & 120 kg ha-1), P levels (0, 15, 30 & 45 kg ha-1), K levels (0, 25, 50 & 75 kg ha-1) and S levels (0, 10, 15 & 20 kg ha-1) in addition with cowdung (at 5 tha-and 10tha-1). The experiment was set up a randomized complete block design with three replications. The results showed that the different treatments significantly influenced seed and straw yields of coriander. All treatments combination exerted positive effect on the growth parameters (umbels plant-1, numbers of umbellet plant-1 and 1000-seed weight) and yield of coriander. The treatment T3(N80P30K50S15 kg ha-1) gave the highest seed yield (1383 kg ha-1). The seed yield increased 58% over absolute control. The highest agronomic efficiencies of N, P, K and S were found to be 9.98, 15.13, 5.12 and 11.6 at 40 kg N, 15 kg P, 50 kg K and 15 kg S, respectively. A combination of macronutrients, 80 kg N, 30 kg P, 50 kg K and 15 kg S ha-1 was found most profitable for seed production of coriander.
BJPST: 15(2): 009-012 [July, 2017]
ISSN: 2305-1809 (Online version)
In this study, soil, water and different plant parts and fruits of tomato (Lycopersicon esculentum Miller) were collected from three different places of Shariakandi Upazilla in Bogra district. The samples water and soil were used to analyze pH, Electric Conductivity (EC) and Total Dissolved Solid (TDS)/ Organic Matter (OM) and also following heavy metals as like cadmium; chromium, copper, iron, nickel, lead and zinc concentrations by using atomic absorption spectrophotometer (AAS) (Varian Spectra AA55B, Australia). But in case of tomato plant parts and fruits were analyzed to identify the amounts of above described heavy metals. In accordance with the results, the lowest and highest heavy metal accumulations measured in fruits were as follows; cadmium (0.03-0.07 mg kg-1), chromium (0.21-1.35 mg kg-1), copper (13.34-13.35 mg kg-1), iron (61.12-65.10 mg kg-1), nickel (0.68-2.79 mg kg-1), lead (0.16-0.28 mg kg-1) and zinc (11.86-24.16 mg kg-1). As a result, the relative abundance of heavy metals in ripen tomato samples were observed as iron>zinc>copper>chromium >nickel >lead>cadmium. This study, it can be said that ripen tomato fruits reflect heavy metal amounts well in polluted areas such as excess use of several agro chemicals, uses, urban and industrial area when compared to unpolluted (control) areas.