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Validation of BRRI Developed Fertilizer Management Technology in Farmers' Fields (tidal Flood Ecosystem, BARIsal Region Iapp)

Pranesh Kumar Saha
Principal Scientific Officer
Soil Science Division, BRRI, Gazipur

M. Nazrul Islam
Scientific Officer
Soil Science Division, BRRI, Gazipur

M. Imran Ullah Sarker
Scientific Officer
Soil Science Division, BRRI, Gazipur

A. Latif Shah
Cheif Scientific Officer
Soil Science Division, BRRI, Gazipur

Abstract/ Executive Summary:

Objective of this study was to increase the awareness about soil management among farmers of Tidal Flood Ecosystem, Barisal region. Six field experiments in T. Aus 2012, nine in T. Aman 2012 and four in Boro 2013 were conducted. The soils of the experimental fields were silty clay loam in texture with neutral reaction. The major crop cycle of that area was Pulse-T. Aus-T. Aman. From the results it is observed that rice straw applied with IPNS based chemical fertilizer performed sound to get a maximum yield and it might be saved a good amount of chemical fertilizer including full dose of K.

Keywords: Rice straw, IPNS, Farmers field, Tidal Flood Ecosystem, Soil management.

Location: Farmers' fields in Barisal, Jhalkathi, Patuakhali and Borguna districts under Barisal region (AEZ 13)

Start Date: 01-07-2012

End Date: 31-06-2013

Program Area: Crop-Soil-Water Management

Non-commodity: Validation

Objectives:

To increase the awareness about soil management among farmers of Tidal Flood Ecosystem, Barisal region.

Methodology:

Six field experiments in T. Aus 2012, nine in T. Aman 2012 and four in Boro 2013 were conducted. The soils of the experimental fields were silty clay loam in texture with neutral reaction. The major crop cycle of that area was Pulse-T. Aus-T. Aman. The plot size of the experimental plot was 8m x 6m. Treatments were, T₁: BRRI recommended dose (AEZ basis), T₂: Rice Straw (4.5 t/ha, sun dry basis)+ IPNS basis chemical fertilizer, T₃: Farmers' Practice (FP). The sources of nutrients P, K, S and Zn were TSP, MoP, Gypsum and Zinc sulphate, respectively. All TSP, MoP, gypsum, zinc sulphate and rice straw were applied at final land preparation. Pilled urea was applied in three splits in the treatment of farmer's practice (T₃). In T. Aus and T. Aman season, 34% at basal, 33% at 20 DAT and rest 33% at 7 days before PI stage and in the other treatments (T₁ & T₂) USG was applied at 12 DAT. One USG (1.8 g) was placed in the middle of four hills at the depth of 7.5-10 cm. BRRI dhan27 and BRRI dhan49 were used as test variety in T. Aus and T. Aman season, respectively. In Boro season pilled urea was applied in three equal splits in the treatment of farmer's practice (T₃) i.e. 33% at 15 DAT, 33% at 35 DAT and rest 33% at 7 days before PI stage and in the other treatments (T₁& T₂) USG was applied at 15 DAT. One USG (2.7 g) was placed in the middle of four hills at the depth of 7.5-10 cm. BRRI dhan47 and BRRI dhan29 were used as test variety in Boro season.

Source of Information: Proceedings of the BRRI Annual Internal Review for2012- 2013

Article Link (Online Journal):

Funding Source:

1. Government	Budget:
2. Bangladesh Agricultural Research Council	Budget:

Total Budget (Tk.) :

Achievement/Findings:

In T. Aus, 2012, treatment T₁ (BRRI dose) and T₂ (Rice straw+ IPNS) produced the higher grain and straw yield over farmers' practice. The highest grain yield of 4.38 t/ha (mean of 6 observations) was obtained with the treatment T₂ (RS+IPNS), which was 26.59% higher than T₃ (Farmers' Practice) while T₁ (BRRI dose) produced 3.99 t/ha grain yield (i.e.15.32% higher than T₃ (Farmers' Practice)). This indicates that rice straw (organic material) applied with IPNS based chemical fertilizer performed sound to get a maximum yield and it might be saved a good amount of chemical fertilizer. Like T. Aus, in T. Aman season similar trend was also observed. The highest grain yield of 4.01 t/ha (mean of 9 observations) was obtained with the treatment T₂, which was 19.0% higher than T₃ (Farmers' Practice) while, T₁ produced 3.66 t/ha grain yield (i.e. 8.61% higher than T₃). Similar trend was also found in Boro season. The highest grain yield of 7.52 t/ha (mean of four observations) was obtained with the treatment T₂, which was 19.75% higher than T₃ (Farmers' Practice) while T₁ produced 6.90 t/ha grain yield (i.e. 9.87% higher than T₃).

Knowledge Management: Report/Proceedings