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Research Detail

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Swarna Shome
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Parimal Kanti Biswas
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Md Jafar Ullah
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Alak Barman
Soil Science Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

Sohela Akhter
Soil Science Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

Nitrogen is not only a major nutrient but also the most limiting nutrient element for rice cultivation. Application of appropriate level of nitrogen can increase growth and yield of rice. Considering this, an experiment was conducted at the Agronomy farm, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during July 2017 to December 2017 in Aman season to examine the effect of different nitrogen levels on yield and yield attributes of transplanted aman rice. The experiment consisted of three nitrogen levels (viz. 50, 100 and 150 kg N ha-1) and four varieties/lines (viz. SAU ADL1, BRRI dhan70, BRRI hybrid dhan6 and SAU ADL11). Results revealed that growth; yield and yield contributing characters of transplanted aman rice were significantly influenced by nitrogen, variety and their interactions. Increasing trend was observed with the increasing level of nitrogen from 50 to 150 kg ha-1 for all growth characters. Maximum grain yield (4.50 t ha-1) and straw yield (8.00 t ha-1) were obtained from 150 kg N ha-1 which were statistically at par with 100 kg N ha-1. The highest harvest index (36.58%) was recorded at 100 kg N ha-1. SAU ADL1 produced highest dry matter hill-1 (99.85 g), 1000-grains weight (31.49 g) and SAU ADL11 gave highest SPAD value. The highest grain yield (5.24 t ha-1) and harvest index (45.44%) were recorded in BRRI hybrid dhan6. Interaction of 150 kg N ha-1 with BRRI hybrid dhan6 gave maximum value of all studied parameters but BRRI dhan70, SAU ADL1 and SAU ADL11 were more responsive to 100 kg N ha-1 to produce better yield of rice.

 

  Variety, SPAD value, Dry matter, Grain yield, Harvest index, Rice
  Agronomy department of Sher-e-Bangla Agricultural University.
  00-07-2017
  00-12-2017
  Crop-Soil-Water Management
  Fertilizer, Rice

To find out the better nitrogen level on rice genotypes to increase growth and yield

Experimental site- The experimental area was situated at 23°77N latitude and 90°33E longitude. The soil of the experimental site belongs to the general soil type, Shallow Red Brown Terrace Soils under Tejgaon Series. Top soils are clay loam in texture, olive-gray with common fine to medium distinct dark yellowish- brown mottles. Soil pH ranges from 5.4-5.6.The total rainfall of 1540 mm was recorded during the cropping period. Treatments- The experiment consisted of three nitrogen levels (viz. 50, 100 and 150 kg N ha-1) and four varieties/lines (viz. SAU ADL1, BRRI dhan70, BRRI hybrid dhan6 and SAU ADL11). Planting materials Initially seeds of a line were collected from an NGO named Suranjana from which two lines SAU ADL1 (SAU ADL- Sher-e-Bangla Agricultural University Agronomy Department) and SAU ADL11 were named under various field observations by the Agronomy department of Sher-e-Bangla Agricultural University. Seeds of another two varieties BRRI dhan70 and BRRI hybrid dhan6 were collected from Bangladesh Rice Research Institute, Gazipur. Experimental design and layout- The experiment was laid out in a split-plot design with three replications having nitrogen in the main plots and variety/line in the sub-plots. The size of unit plot was 3.0 m × 2.2 m. Crop management The experimental field was fertilized with 80, 80 and 20 kg ha-1 of P2O5, K2O and S during final land preparation. Urea was top-dressed in three installments, after seedling recovery, during the vegetative stage and at 7 days before panicle initiation as per treatment. 30 days old seedlings were transplanted on 5th August, 2017 with 20 cm × 20 cm spacing on the well-puddled plots. Irrigation, weeding and other agronomic practices were done whenever necessary. Data collection- Five preselected plants were used to recorded data on plant height and number of tillers hill-1, number of effective and ineffective tillers hill-1 after harvest. Leaf area index was estimated measuring the length and average breadth of leaf and multiplying by a factor of 0.75 followed by Yoshida (1981). The plants of 2 hills plot-1 uprooted from second line were oven dried until reached to a constant weight and then the weight was measured and calculated as g hill-1 to obtain dry matter hill-1. Total grains panicle-1 and weight of 1000 grains were recorded from 10 randomly selected panicles. The crop was harvested from an area of 3.96 m2 excluding the border area. The harvested yield was converted into t ha−1 at 14% moisture content. Statistical analysis- All the collected data were analyzed following the analysis of variance (ANOVA) technique and using Statistix 10 package and the mean differences were adjudged by LSD technique (Gomez and Gomez, 1984).

  International Journal of Bio-sciences, Vol. 15, No. 4, p. 266-277, 2019
  http://dx.doi.org/10.12692/ijb/15.4.266-277
Funding Source:
1.   Budget:  
  

On the basis of present research, it can be concluded that BRRI hybrid dhan6 with 150 kg N ha-1 performed better for all studied parameter but SAU ADL1 and SAU ADL11 with 100 kg N ha-1 appeared as the promising combination in respect of yield of rice as BRRI dhan70. So, SAU ADL1 and SAU ADL11 with 100 kg N ha-1 can be suggested for further research under different agro-ecological zones to reach a specific conclusion and recommendation.

  Journal
  


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