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Interaction Effect of Irrigation Interval Based on Awd Method for Water Saving and N Fertilization in Boro Rice Cultivation-2007-8

Dr M Nazmul Hasan
PSO
IWMD, BRRI

Dr Shahana Parveen
SSO
IWMD, BRRI

Abstract/ Executive Summary:

An experiment was conducted at BRRI farm, Gazipur to quantify the amount of water needed for Boro rice cultivation by practicing alternate wetting and drying (AWD) and to determine N use efficiency by practicing alternate wetting and drying. Fertilizer treatment was Prilled urea and USG.The highest grain yield (6.23 t/ha) was recorded from AWD method (irrigation 5-7 cm when water is 15 cm below soil surface). Similarly highest mean yield (6.59 t/ha) and mean nutrient uptake (117 kg/ha) were recorded from water-fertilizer interaction of same AWD method (irrigation 5-7 cm when water is 15 cm below soil surface) along with USG. Grain yield and yield attributes were not statistically significant difference by effect of irrigation treatment except plant height. Maximum and minimum grain yield was recorded in treatment I₁(6.23 t/ha) and treatment I₂ (5.87 t/ha). Grain yield, plant height and panicle/m² were statistically significant difference by effect of fertilizer treatments USG and prilled urea. Yield and yield contributing character of Boro rice were not statistically significant difference by interaction effect of irrigation and fertilizer. The highest filled grain/panicle (133) recorded from irrigation (5-7 cm) after 3 days of disappearing of standing water with USG (I₃F₂). The lowest filled grain per panicle (95) recorded from irrigation (5-7 cm) when water is 15 cm below soil surface and prilled urea (I₁F₁). The highest sterility (23%) was recorded from saturation plot with USG (I₄F₂).The lowest sterility (3.6%) was recorded from irrigation (5-7 cm) when water is 30 cm below soil surface and prilled urea (I₂F₁ ).Maximum and minimum mean nutrient uptake were recorded 115.0 kg/ha and 99.0 kg/ha in treatment I₂(irrigation 5-7 cm when water is 15 cm below soil surface) and I₃ (irrigation 5-7 cm after 3 days of disappearing of standing), respectively. Nutrient uptake attributes was influenced by effect of fertilizer treatment in USG and prilled urea.

Keywords: Nutrient uptake, USG, AWD

Location: BRRI farm, Gazipur

Start Date: 01-07-2007

End Date: 30-06-2008

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To quantify the amount of water needed for Boro rice cultivation by practicing alternate wetting and drying (AWD);
To determine N use efficiency by practicing alternate wetting and drying;
To determine the productivity and profitability of AWD for Boro crop; and
To develop easy tool for irrigation scheduling in Boro season.

Methodology:

The field experiment was conducted at BRRI farm, Gazipur, during 2008-09. The treatment comprised four levels of irrigation and two levels of fertilizer (i) Prilled Urea (F₁) and (ii) USG (F₂) in split plot design with the level of irrigation in main plot and two levels of fertilizer in sub plot, replicated three times. The experiment was conducted in Boro season with the following treatments:I₁ = Irrigation (5-7 cm) when water is 15 cm below soil surface,I₂ = Irrigation (5-7 cm) when water is 30 cm below soil surface,I₃ = Irrigation (5-7cm) after 3 days of disappearing standing water and I₄ = Saturation (Control). Recommended doses of fertilizers were applied as per the crops. A fertilizer dose of 260 + 100 + 110 +56 kg/ha of Urea, TSP, MP, Gypsum was used for Boro crop. USG of 100 kg N/ha was used for Boro crop. Plot size was 4mx5m. Perforated PVC pipe of 6 inch diameter was installed in experimental plots (Treatment I₁ and I₂ plot). BRRI dhan28 was the chosen variety. Transplanting and harvesting date of BRRI dhan28 were 05.01.08 and 04.05.08, respectively. Seedling age was 45 days. Irrigation water was measured by V- notch. Evaporation data was collected from nearby installed Evaporation pan. Rainfall data measured by True-check rain gauge. Seepage and Percolation losses was measured with vertical gauge which installed in the experiment plot. Yield and yield component data was collected.

Source of Information: Proceedings of the BRRI Annual Review for 2008, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Grain yield and yield attributes were not statistically significant difference by effect of irrigation treatment except plant height. Maximum and minimum grain yield was recorded in treatment I₁(6.23 t/ha) and treatment I₂ (5.87 t/ha). Grain yield, plant height and panicle/m² were statistically significant difference by effect of fertilizer treatments USG and prilled urea. Yield and yield contributing character of Boro rice were not statistically significant difference by interaction effect of irrigation and fertilizer. The highest filled grain/panicle (133) recorded from irrigation (5-7 cm) after 3 days of disappearing of standing water with USG (I₃F₂). The lowest filled grain per panicle (95) recorded from irrigation (5-7 cm) when water is 15 cm below soil surface and prilled urea (I₁F₁). The highest sterility (23%) was recorded from saturation plot with USG (I₄F₂). Maximum and minimum mean nutrient uptake were recorded 115.0 kg/ha and 99.0 kg/ha in treatment I₂(irrigation 5-7 cm when water is 15 cm below soil surface) and I₃ (irrigation 5-7 cm after 3 days of disappearing of standing), respectively. Nutrient uptake attributes was influenced by effect of fertilizer treatment in USG and prilled urea.

Knowledge Management: Report/Proceedings