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Research Detail

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Sudip Chakrabortty
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

S. Islam
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

P. K. Biswas
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

H. Mehraj
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

AFM Jamal Uddin
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

An experiment was conducted at Agronomy farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh from December 2011 to May 2012 to study the growth and yield of Boro rice (BRRI dhan50) as affected by seedling age under System of Rice Intensification (SRI). Experiment comprised four different aged seedling viz. A1: 12 days old seedling, A2: 14 days old seedling, A3: 16 days old seedling and A4: 30 days old seedling following Randomized Completely Block Design with three replications. Maximum number of filled grain (101.0/panicle), 1000-grain weight (19.9 g), grain yield (5.1 t ha-1), straw yield (5.1 t ha-1), biological yield (10.2 t ha-1) were found from A2 and minimum weed population (43.7/m2 at 30 DAT and 63.1/m2 at 60 DAT) was also found from A2. 14 days old seedling was found as best for yield of BRRI dhan50 under System of Rice Intensification.

 

  BRRI dhan50, Seedling age, Growth and Yield
  Agronomy farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
  00-12-2011
  00-05-2012
  Crop-Soil-Water Management
  Rice

To study the growth and yield of Boro rice (BRRI dhan50) as affected by seedling age under System of Rice Intensification (SRI)

An experiment was conducted in Agronomy farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh from December 2011 to May 2012. Experiment consisted four different aged seedlings viz. A1: 12 days old seedling, A2: 14 days old seedling, A3: 16 days old seedling and A4: 30 days old seedling following Completely Randomized Block Design with three replication. The seeds of BRRI dhan50 were collected from Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur. The fertilizers N, P, K, S, Zn and B in the form of urea (150 kg ha-1), TSP (100 kg ha-1), MP (80 kg ha-1), gypsum (60 kg ha-1), zinc sulphate (10 kg ha-1) and borax (10 kgha-1) respectively were applied. Entire amount of TSP, MP, gypsum, zinc sulphate and borax were applied during final preparation of plot land. Mixture of cowdung and compost (10 tha-1) was applied during 15 days before transplantation. Urea was applied in three equal installments at after recovery, tillering and before panicle initiation. Data were collected on plant height, number of tillers/hill, leaf area index, dry matter/hill, effective tillers/hill, ineffective tillers/hill, panicle length, filled grains/panicle, unfilled grains/panicle, weight of 1000-grains, grain yield, straw yield, biological yield, harvest index, weed population/m2 and weed dry matter/m2. Leaf area index measured manually and final data calculated multiplying by a correction factor 0.75. Collected plants including roots, leaves, grain and straw were oven dried at 700C for 72 hours then transferred into desiccator and allowed to cool down at room temperature, final weight was taken and converted into dry matter content/hill. The biological yield was calculated with the following formula:

Biological yield = Grain yield + Straw yield.

Harvest index was calculated by following formula

HI (%) = {Economic yield (grain weight) ÷ Biological yield (Total dry weight)} × 100

Collected data were statistically analyzed using IRRISTAT software to observe the significant difference among the treatments. The mean values of all the characters were calculated and analysis of variance was performed. The significance of the difference among the treatment means was estimated by the Least Significant Difference (LSD) test at 5% level of probability.

 

  INTERNATIONAL JOURNAL OF BUSINESS, SOCIAL AND SCIENTIFIC RESEARCH, Volume: 3, Issue: 2, Page: 97-101,(2015), ISSN: 2309-7892
  
Funding Source:
1.  Government Budget:  
  

Fourteen (14) days old seedling was found as best for yield of BRRI dhan50 under System of Rice Intensification. Finally, it can be concluded that lower seedling age of rice planted in SRI revealed higher grain yield compared to that a conventional practice.

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