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Study on Water Productivity for Rice Based Cropping System-2008

Dr M Nazmul Hasan
PSO
IWMD, BRRI

Dr Shahana Parveen
SSO
IWMD, BRRI

Abstract/ Executive Summary:

Highest yield of T. Aman was 3.82t/ha with one supplemental irrigation and in Boro season 6.62 t/ha in treatment T₃ (irrigation after 3 days of disappearing of 5–7 cm water) in cropping system P₁(T. Aman-Boro-Fallow). Similarly highest yield of T. Aman, Wheat and Mungbean were found respectively 2.84 t/ha with one supplemental irrigation, 3.47 t/ha with treatment T₃(three irrigation) and 0.66 t/ha with two irrigation in cropping system P₂(T. Aman-Wheat-Mungbean). Again highest yield of T. Aman, potato and Mungbean were found 3.35 t/ha with one supplemental irrigation, 29.78 t/ha with treatment T₃ (three irrigation) and 1.17 t/ha with one irrigation respectively in cropping system P₃(T. Aman-Potato-Mungbean). A significant variation in net return was observed among different crop sequences /cropping system. Maximum net return (278369) was recorded in T. Aman – Potato – Mungbean crop sequence, followed by T. Aman – Boro– fellow (133886), and T. Aman – Wheat- Mungbean (121336). Among the different levels of irrigation, significantly higher net profit was recorded with maximum frequency of irrigation.Among the three crop sequence, water productivity was maximum (19.0 kg/ha-mm) in T. Aman- Potato- Mungbean. Also maximum year round yield equivalent in terms of rice (23.14 t/ha) and net return (Tk 278369) was recorded in T. Aman- Potato-Mungbean crop sequence.

Keywords: Water Productivity, Rice based cropping pattern, REY

Location: BRRI farm, Gazipur

Start Date: 01-07-2007

End Date: 30-06-2008

Program Area: Crop-Soil-Water Management

Commodity: Water productivity

Objectives:

i) To quantify the amount of water required for rice based cropping system; and

ii) To determine the productivity and profitability of the cropping system.

Methodology:

The field experiment was conducted at BRRI farm, Gazipur during 2006-07. The treatment comprised levels of irrigation and three rice based crop sequences, laid out in Split plot design with crop sequences in plot and irrigation in sub plot, replicated 3 times. Different rice based crop sequences/cropping system were: P₁= T. Aman – Boro – Fallow , P₂ = T. Aman – Wheat – Mungbean , and P₃ = T. Aman – Potato – Mungbean. Irrigation treatments for T aman were follows:T₁ = Rainfed ,T₂ = One irrigation at vegetative and one in reproductive stage and T₃ = One irrigation at vegetative and two in reproductive stage. For boro season were T₁ = Irrigation (5-7cm) when water is 15 cm below soil surface, T₂ = Irrigation (5-7cm) when water is 30 cm below soil surface and T₃ = Irrigation after 3 days of disappearing standing water. For wheat, T₁ = One irrigation (17 – 21 DAS), T₂= Two irrigation (17- 21 DAS + 55 – 60 DAS) and T₃ = Three irrigation (17- 21 DAS + 55 – 60 DAS +70 – 75 DAS). For Potato, T₁= One irrigation (20 – 25 DAS), T₂ = Two irrigation (20- 25 DAS + 40 – 45 DAS) and T₃ = Three irrigation (20- 25 DAS + 40 – 45 DAS +60 – 65 DAS). For Mungbean: T₁= Rainfed, T₂= One irrigation and T₃= Two irrigations. Recommended doses of fertilizers were applied as per the crops. A fertilizer dose of 150 + 100 + 70 + 33 + 50 and 220 + 120 + 85+ 28+ 50 kg/ha of Urea, TSP, MP, Gypsum and Zinc sulphate were used for T. Aman and Boro crop respectively. Again a fertilizer dose of 220 + 180 + 50 +120, 250 +150 + 250 + 120 + 8 + 10 and 50 + 85 +35 kg/ha of Urea, TSP, MP, Gypsum and Zinc sulphate, Boron (Potato) were used for Wheat, Potato and Mungbean respectively.

Source of Information: Proceedings of BRRI Annual Internal Review for 2008

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Highest yield of T. Aman was 3.82t/ha with one supplemental irrigation and in Boro season 6.62 t/ha in treatment T₃ (irrigation after 3 days of disappearing of 5–7 cm water) in cropping system P₁(T. Aman-Boro-Fallow). Similarly highest yield of T. Aman, Wheat and Mungbean were found respectively 2.84 t/ha with one supplemental irrigation, 3.47 t/ha with treatment T₃(three irrigation) and 0.66 t/ha with two irrigation in cropping system P₂(T. Aman-Wheat-Mungbean). Again highest yield of T. Aman, potato and Mungbean were found 3.35 t/ha with one supplemental irrigation, 29.78 t/ha with treatment T₃ (three irrigation) and 1.17 t/ha with one irrigation respectively in cropping system P₃(T. Aman-Potato-Mungbean). Maximum net return (278369) was recorded in T. Aman – Potato – Mungbean crop sequence, followed by T. Aman – Boro– fellow (133886), and T. Aman – Wheat- Mungbean (121336). Among the different levels of irrigation, significantly higher net profit was recorded with maximum frequency of irrigation.Among the three crop sequence, water productivity was maximum (19.0 kg/ha-mm) in T. Aman- Potato- Mungbean. Also maximum year round yield equivalent in terms of rice (23.14 t/ha) and net return (Tk 278369) was recorded in T. Aman- Potato-Mungbean crop sequence.

Knowledge Management: Report/Proceedings