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Farmer’s Participatory Site Specific Nutrient Management in Tidal Flooded Soil for High Yielding Aus Rice

M Sh Islam
PSO
Bangladesh Rice Research Institute Regional Station, Rangpur.

M N H Mahmud
Senior Scientific Officer
Irrigation and Water Management Division, Bangladesh Rice Research Institute, Gazipur 1701.

F Rahman
Soil Science Division, Bangladesh Rice Research Institute, Gazipur 1701.

M A Saleque
Coordinator for Advanced Studies and Research
Bangladesh RiceResearch Institute, Gazipur 1701

Abstract/ Executive Summary:

Experiments were conducted in farmers’ fields at Bakergonj, Barisal and Kathaltoli, Potuakhali districts to develop site-specific nutrient management package for high yielding aus rice. The participating farmers delineated soil fertility as the most fertile (grade I), medium fertile (grade II) and the least fertile (grade III) soil. Omissions of N, P, and K were compared with added NPK fertilizers in different fertility grades. At Bakergonj, the NPK treat plots yielded 4.29, 4.36 and 2.09 t ha^{– 1} in soil grade I, II and III, respectively. Omission of N, P and K reduced grain yield by 0.76, 0.95 and 0.29 t ha^-1 in grade I, 1.53, 0.87 and 1.25 t ha^-1 in grade II and 0.64, 0 and 0.28 t ha-¹ in grade III, respectively. At Kathaltoli, the grain yield (6.21 t ha^–1) in grade I was higher than grade II (5.58 t ha^–1) and grade III (5.11 t ha^–1). Omission of N, P and K reduced grain yield by 0.93, 0.18 and 0.09 t ha^-1 in grade I, 1.30, 0.37 and 0.93 t ha^-1 in grade II and 1.86, 1.30 and 1.30 t ha^-1 in grade III, respectively. For Bakergonj, the calculated optimum doses of N were 34, 69 and 29 kg ha^–1, P were 4.0, 4.0 and 0.0 kg ha^-1 and K were 7.0, 31.0 and 7.0 kg ha^–1 for fertility grade I, II and III, respectively. For Kathaltoli, the calculated optimum doses of N were 42, 59 and 84 kg ha ^–1, P were 1.0, 2.0 and 5.0 kg ha^-1 and K were 2.0, 23.0 and 33.0 kg ha^–1 for fertility grade I, II and III, respectively. The application of predicted fertilizer dose might increase rice yield in all fertility grades of soil in both the locations.

Keywords: Soil fertility grade, Fertilizer dose, Grain yield, Relative yield.

Location: Bakergonj, Barisal and Kathaltoli, Potuakhali

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To recognize spatial variability in soil-fertility in rice fields and develop a field-specific nutrient management package for Aus rice in tidal ecosystems.

Methodology:

The experimental sites fall under the agro-ecological zone 13 located at Dodul Mow village in Bakergonj upazilla under Barisal district and Kathaltoli, Mirjagonj Upazilla under Potuakhali district. T. Aus–T. Aman–Fallow is the dominant cropping system in those villages for last 40 years. T. Aus is grown during April to July using both high yielding and local rice varieties. The study was conducted during Aus season, 2009 at different soil fertility grades. The farmers were asked to provide information on village boundaries, yield performance of rice in different fields of the village, rice varieties grown and fertilizer uses. The participating farmers sketched a village map, delineating crop fields and uncultivable area. After completion of village map, they sketched a field map and we facilitated the drawing of sub-field boundaries. Each sub-field was occupied several individual plots. The participating farmers divided the entire field into three fertility grades based on yield history and they marked the soil as grade-I, grade-II and grade-III for most fertile, fertile and the least fertile, respectively. They grow BR12, BR2 (Mala) and Monsur IRRI, a locally named HYV were during the Aus season. A farmers meeting with 10 participants were held at each village, representing Aus growing area. The farmers were asked to provide information on village boundaries, yield performance of rice in different fields of the village, rice varieties grown and fertilizer uses. The participating farmers sketched a village map, delineating crop fields and uncultivable area. Each sub-field was occupied several individual plots. The participating farmers divided the entire field into three fertility grades based on yield history and they marked the soil as grade-I, grade-II and grade-III for most fertile, fertile and the least fertile, respectively. They grow BR12, BR2 (Mala) and Monsur IRRI, a locally named HYV were during the Aus season. Required amounts of N, P and K were applied as urea, TSP and MP, respectively, as per treatment. Full dose of TSP and MP were applied during final land preparation and urea was applied after 15 and 30 days after transplanting at Bakergonj whereas urea super granules (USG) was applied at Kathaltoli.

Source of Information: Bangladesh Rice J. 17(1&2): 1-6, 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

At Bakergonj, the NPK treated plots yielded 4.29, 4.36 and 2.09 t ha ^{– 1} in soil grade I, II and III, respectively. Omission of N, P and K reduced grain yield by 0.76, 0.95 and 0.29 t ha^-1 in grade I, 1.53, 0.87 and 1.25 t ha^-1 in grade II and 0.64, 0 and 0.28 t ha^-1 in grade III, respectively. At Kathaltoli, the grain yield (6.21 t ha^–1) in grade I was higher than grade II (5.58 t ha^–1) and grade III (5.11 t ha^–1). Omission of N, P and K reduced grain yield by 0.93, 0.18 and 0.09 t ha^-1 in grade I, 1.30, 0.37 and 0.93 t ha^-1 in grade II and 1.86, 1.30 and 1.30 t ha^-1 in grade III, respectively. For Bakergonj, the calculated optimum doses of N were 34, 69 and 29 kg ha^–1, P were 4.0, 4.0 and 0.0 kg ha^-1 and K were 7.0, 31.0 and 7.0 kg ha^–1 for fertility grade I, II and III, respectively. For Kathaltoli, the calculated optimum doses of N were 42, 59 and 84 kg ha ^–1, P were 1.0, 2.0 and 5.0 kg ha^-1 and K were 2.0, 23.0 and 33.0 kg ha^–1 for fertility grade I, II and III, respectively. The application of predicted fertilizer dose might increase rice yield in all fertility grades of soil in both the locations.

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