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Research Detail

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M. Nurul Islam
PSO
Agronomy Division, Gazipur

M. Akhteruzzaman
PSO
Agronomy Division, Gazipur

The experiment was conducted at BARI farm, Joydebpur and RARS Jessore during rabi season of 2007-08 to find out optimum fertilizer dose for higher productivity of potato-hybrid maize relay cropping system. Four fertilizer levels viz. 125-19-80-20-2-0.5; 190-37-110-30-4-1; 255-55-140-40-6-2 and 320-73-170-50-6-2 kg/ha NPKSZnB were tested on potato-hybrid maize intercropping system. Significantly the highest yield of potato (22.94 t/ha) and hybrid maize (7.95 t/ha) were recorded from 320-73-170-50-6-2 kg/ha NPKSZnB (F4) at Joydebpur. But at Jessore, the height results were obtained from 255-55-140-40-6-2kg/ha NPKSZnB. The highest potato equivalent yield (32.22 t/ha), gross margin (Tk 287500/ha) and benefit cost ratio (3.66) were obtained from F4 at Joydebpur fertilizer level. On the other hand, at Jessore the height value of these parameters were obtained from 255-55-140-40-6-2 kg/ha NPKSZnB. The results revealed that the optimum economic fertilizer dose for potato-hybrid maize intercropping system is 320-73-170-50-6-2 kg/ha NPKSZnB for Joydebpur and 255-55-140-40-6-2kg/ha NPKSZnB for Jessore region.

  Potato, Maize, Relaycropping, Fertilizers level
  Joydebpur and RARS, Jessore
  30-12-2007
  28-02-2008
  Farming System
  Potato, Maize

To find out optimum fertilizer dose for higher productivity of potato-hybrid maize intercropping system.

The experimental was conducted at BARI farm, Joydebpur, Gazipur and RARS, Jessore during rabi season of 2007-2008. Soils of both the sites were low in organic matter and deficient in NPKSZnB. Four fertilizer doses viz, F1=125-19-80-20-2-0.5, F2= 190-37-110-30-4-1, F3= 255-55-140-40-6-2, and F4 =320-73-170-50-6-2 kg/ha NPKSZnB were tested on potato-hybrid maize relay cropping system. The experiment was laid out in a RCB design with 3 replications. The unit plot size was 3m x 3m. Cardinal variety of potato was sown on November 27, 2007 at Joydebpur and November 23, 2007 at Jessore maintaining 75 cm x 20 cm spacing. Seeds of hybrid maize (var. Pacific 984) were sown on December 30, 2007 at Joydebpur and December 27, 2007 at Jessore in between two potato rows with a plant to plant distance of 25 cm. At 3m x 3m plot, 100% potato (53, 333 plant/ha) and 75% maize (40, 000 plant/ha) can be maintained through this combination but at a large sized plot more than 99% maize can be accommodated. The full amount of PKSZnB and 1/3 N were applied as basal in the form of triple super phosphate, muriate of potash, gypsum, zinc sulphate, boric acid and urea, respectively. The remaining N was top dressed in two equal splits at the time of maize sowing and after potato harvest. A light irrigation was given after potato sowing for proper emergence. Earthing up of potato, sowing of maize and 1st top dressing were done on same day followed by irrigation. Intercultural operations were done as and when necessary. Other three irrigations were given after harvesting of potato (during 2nd top dressing), at 60 and 90 DAS of maize. Potato was harvested on February 28, 2008 at Joydebpur and February 24, 2008 at Jessore; and maize on May 05, 2008 at Joydebpur and May 01, 2008 at Jessore. Yield components of potato and maize were taken from randomly selected 10 plants from each plot. Yields of both the crops were taken from whole plot. Equivalent yields were computed using the formula of Bandyopadhaya (1984). Data on yield and yield components of both the crops were analyzed statistically and the means were adjudged using LSD. Economic analysis was also done.

  Annual Report, Agronomy Division 2007-2008, BARI
  
Funding Source:
1.  Asian Development Bank Budget:  20,000/-
   20,000/-

It may be concluded that the optimum economic fertilizer dose for potato-hybrid maize intercropping system is 320-73-170-50-6-2 kg/ha NPKSZnB for Joydebpur and 255-55-140-40- 6-2 kg/ha NPKSZnB/ha for Jessore regions.

  Report/Proceedings
  

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