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Research Detail

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M.R. Biswash
Scientific Officer
Adaptive Research Division, Bangladesh Rice Research Institute, Bangladesh.

M. Haque
Scientific Officer (Golden Rice)
Plant Breeding Division, Bangladesh Rice Research Institute, Bangladesh.

M. Sharmin
Scientific Officer
Horticulture Research Center, Bangladesh Agricultural Research Institute, Bangladesh.

An experiment was conducted at the Bangladesh Rice Research Institute (BRRI), Gazipur during Aman season of 2012 to study the effects of reduced rates of different fertilizers on growth and yield of BRRI dhan49. The experiment was laid out in a RCBD with three replications. There were seven treatments viz, control, recommended fertilizer dose (RFD), 50% reduced rate of N, 50% reduced rate of P, 50% reduced rate of K, 50% reduced rate of S and 50% reduced rate of Zn. The grain and straw yields as well as biological yield of BRRI dhan49 were significantly affected due to different treatments. The highest grain yield of 6.16 t ha-1 was observed in the treatment 50% reduced rate of N which was statistically identical to those recorded in the treatments with recommended fertilizer dose and 50% reduced rate of P. Effective tillers hill-1, filled grains panicle-1, 1000-grains weight had also higher in the treatment 50% reduced rate of N and unfilled grains panicle-1 lower in the treatment 50% reduced rate of N However, plant height and panicle length had higher in 50% reduced rate of P. Therefore, the treatment 50% reduced rate of N fertilizer performed better than RFD and other treatments.

  Fertilization, Chemical fertilizer, Yield, Rice ( Oryza sativa L.)
  BRRI farm, Gazipur
  00-00-2012
  00-00-2012
  Crop-Soil-Water Management
  Rice, Fertilizer

To investigate on the effects of reduced rates of different fertilizers on the growth and yield of BRRI dhan49.

The experiment was conducted at the BRRI farm, Gazipur during the  Aman season of 2012. The site belongs to the Agro-ecological Zone (AEZ- 28) Madhupur Tract. The experiment was laid out in a RCBD with three replications. The soil of the experimental field was silty clay loam in texture and neutral in reaction. Organic C, total N, available P (Modified Olsen’s) and exchangeable K (NH4 OAc) of the soil were 1.45%, 0.10%, 13 ppm and 0.23 meq/100 g soil, respectively. The available S (calcium dihydrogenphosphate) and Zn (DTPA) were 20 ppm and 5 ppm, respectively. There were 21 (7 x 3) unit plots. The unit plot size was 2.5 m x 4 m. The spacing between blocks was 1m and between plots was 0.5 m. The treatments were randomly distributed to unit plots in each block. Twenty five day old seedlings were transplanted in the experimental plots on 20 August 2012. A distance of 20 cm from row to row and 20 cm from plant to plant was maintained. Two seedlings were used in each hill. The crops were harvested at a time due to 80% maturity of grains. Recommended Fertilizer Dose (RFD) = 100 kg N ha-1, 15 kg P ha-1, 50 kg K ha-1, 15 kg S ha-1 and 1.5 kg Zn ha-1.The sources of N, P, K, S and Zn nutrients were Urea, TSP, MoP, Gypsum and Zinc sulphate, respectively. The data collected on different parameters were statistically analyzed to obtain the level of significance using the Statistix 10 computer package program. The mean differences among the treatments were compared by least significant difference test at 5% level of significance.

  World Journal of Agricultural Sciences 11 (1): 08-12, 2015, ISSN 1817-3047
  DOI: 10.5829/idosi.wjas.2015.11.1.1838
Funding Source:
1.   Budget:  
  

Yield contributing characters like plant height, effective tillers hill-1, panicle length, filled and unfilled grains panicle-1 and 1000-grains weight were significantly influenced by the treatments. It was observed that application of at best 50% reduction of all the fertilizers from the recommended fertilizer dose affect non-significantly in grain yield as well as straw yield. In the experiment 50% reduced rate of N from recommended fertilizer dose performed better than other treatments.

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