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Research Detail

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M. N. ISLAM
Principal Scientific Officer
Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

M. AKHTERUZZAMAN
Principal Scientific Officer
Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh.

M. S. ALOM
Principal Scientific Officer

The experiment was conducted at the research field of Agronomy Division, BARI, Joydebpur, Gazipur during consecutive seasons of 2011-12 and 2012-13 to optimize fertilizer rate for potato hybrid maize relay cropping system. Seven treatments viz., T1= Farmers? fertilizer dose of potato (FFDP: N504P162K309 kg/ha) + Farmers? fertilizer dose of hybrid maize (FFDM: N0 P0 K0 kg/ha), T2= FFDP + 100% N of recommended fertilizer dose of hybrid maize (RFDM: N255 P55 K140 S40 Zn6 B2 kg/ha), T3= FFDP + 100% N & 25% others of RFDM, T4= FFDP + 100% N & 50% others of RFDM, T5= Recommended fertilizer dose of potato (RFDP: N198 P44 K194 S24 Zn6 B1.2 kg/ha) +100% N of RFDM, T6= RFDP +100% N & 25% others of RFDM, and T7= RFDP +100% N & 50% others of RFDM were tested on potato-hybrid maize relay cropping system. Potato (var. Diamant) and hybrid maize (var. BARI Hybrid Maize-9) were used in this experiment. Results indicated that yield of potato (28.38 - 28.83 t/ha) did not differ significantly but yield of hybrid maize (4.90 - 8.74 t/ha) varied significantly under different treatments. The higher grain yield (8.74 t/ha) of hybrid maize was recorded in farmers? fertilizer dose of potato or recommended fertilizer dose of potato (8.61 t/ha) along with 100% N plus 25% other fertilizers or 100% N plus 50% other fertilizers from recommended dose of hybrid maize. The highest potato equivalent yield (41.94 t/ha) and gross return (Tk. 335520/ha) were obtained from FFDP along with 100% N plus 25% others of RFDM (T3). But the highest gross margin (Tk. 219790/ha) and benefit cost ratio (3.01) were found from RFDP along with 100% N plus 25% others of RFDM (T6). The results revealed that recommended fertilizer rate of potato (N198 P44 K194 S24 Zn6 B1.2 kg/ha) along with 100% N plus 25% other fertilizers from recommended fertilizer rate of hybrid maize (N255 P55 K140 S40 Zn6 B2 kg/ha) might be optimum for potato hybrid maize relay cropping system for obtaining higher economic return.

  Optimization, Fertilizer rate, Potato, Hybrid maize and Relay cropping.
  Agronomy Division, BARI, Joydebpur, Gazipur during the consecutive seasons of 2011-12 and 2012- 13.
  00-00-2011
  00-00-2013
  Farming System
  Fertilizer

The experiment was conducted to optimize fertilizer rate for potato-hybrid maize relay cropping system for obtaining higher productivity and economic return.

The experiment was conducted at the research field of Agronomy Division, BARI, Joydebpur, Gazipur during the consecutive seasons of 2011-12 and 2012- 13. The soil of the experimental field was silty clay loam in texture with pH 5.8 belonging to Chhiata series under AEZ 28. The soil was low in organic matter (1.2%) and deficient in total N (0.07%), available P (13 ppm), exchangeable K (0.15 meq/100 g soil), available S (12 ppm), and available B (0.12 ppm). The crops received total rainfall of 210 and 222 mm during crop growing period in 2011-12 and 2012-13, respectively. The monthly mean maximum and minimum air temperature were 29.1 oC and 17.7 oC, respectively, during 2011-12, while 28.9 oC and 17.5 oC, respectively, in 2012-13. Seven treatments consisted of T1= Farmers fertilizer dose of potato (FFDP: N504P162K309 kg/ha) + Farmers fertilizer dose of hybrid maize (FFDM: N0 P0 K0 kg/ha), T2= FFDP + 100% N of recommended fertilizer dose of hybrid maize (RFDM: N255 P55 K140 S40 Zn6 B2 kg/ha), T3= FFDP + 100% N & 25% others of RFDM, T4= FFDP + 100% N and 50% others of RFDM, T5= Recommended fertilizer dose (N198 P44 K194 S24 Zn6 B1.2 kg/ha) of potato (RFDP) +100% N of RFDM, T6= RFDP +100% N & 25% others of RFDM and T7= RFDP +100% N and 50% others of RFDM. The experiment was laid out in a randomized complete block design with 3 replications. The unit plot size was 3m x 3m. „Diamant? variety of potato and BARI Hybrid Maize-9 variety of hybrid maize were used in this study. Potato was planted on 29 November 2011 and 28 November 2012 maintaining 60cm × 25cm spacing. Maize was sown in between two potato rows with a seed to seed distance of 20 cm when vegetative growth of potato was ceased as relay crop on 13 February in 2012 and 2013 (76 days after potato planting). In the case of potato, ½ of N and full amount of PKSZnB were applied as basal in the form of urea, triple super phosphate, muriate of potash, gypsum, zinc sulphate, and boric acid, respectively. The remaining N was top dressed at 30 days after potato planting followed by earthing up and irrigation. In hybrid maize, ½ of N and full amount of other fertilizers (where applicable) were applied as side dressing just after potato harvesting followed by irrigation. The rest N was side-dressed at 30 days after potato harvesting followed by irrigation. A light irrigation was given after potato sowing for proper emergence. Other intercultural operations were done as and when required. Potato was harvested on 02 March in 2012 and 2013 (94 DAS) and maize on 14 June in 2012 and 2013 (122 DAS). Yield components of potato and maize were taken from randomly selected 5 plants from each plot. Yields of both the crops were taken from whole plot. Potato equivalent yield was computed by converting yield of intercrops on the basis of prevailing market price of individual crop.

  Bangladesh J. Agril. Res. 39(2): 351-357, June 2014 ISSN 0258-7122
  
Funding Source:
  

The above results revealed that recommended fertilizer rate of potato (N198 P44 K194 S24 Zn6 B1.2 kg/ha) along with 100% N plus 25% other fertilizers from recommended fertilizer rate of hybrid maize (N255 P55 K140 S40 Zn6 B2 kg/ha) might be optimum for potato hybrid maize relay cropping system for getting higher economic return.

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