Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
Journal of Agronomy
Year: 2002  |  Volume: 1  |  Issue: 3  |  Page No.: 127 - 130

Combination of Azolla and Urea Nitrogen for Satisfactory Production of Irrigated Boro Rice (BRRI Dhan 29)

Shamima Akhter, M.H. Mian, M.A. Kader and S.A. Begum    

Abstract: A suitable combination of Azolla and urea-N was investigated for cultivation of rice (cv. BRRI Dhan 29). For this purpose an attempt was made to apply 30, 40, 50, 60 and 70% of the recommended doses of urea in 2 or 3 splits along with incorporation of one layer of Azolla grown from 0.2 kg m-2 inoculum. Two separate treatments of applying 100% of the recommended dose of urea in 3-splits (without Azolla) and no application of N at all from either urea or Azolla were included. Azolla covered the surface area in 13 days after inoculation at 7 DAT and reached the maximum growth in 19 days producing 14.0 to 18.3 t ha-1 fresh biomass containing 20.7 to 26.4 kg N ha-1. Incorporation of one layer of Azolla at 30 DAT plus application of 50, 60 and 70 kg N ha-1 in 3 splits constituted the application of 72.7, 81.6 and 91.1 kg N ha-1 that produced 5.58, 6.00 and 6.02 t ha-1 grain yields which were statistically similar to each other but the latter two were statistically superior to the grain yield of 5.40 t ha-1 produced by conventional recommended practice. Total uptake of N, P and S by the rice plants (grain+straw) were increased significantly due to incorporation of Azolla. Incorporation of one layer of Azolla plus application of 60% of urea-N appeared as the best combination in this study.

Cited References   |    Fulltext    |   Related Articles   |   Back
   
 
 
 
  Related Articles

No Article Found
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility