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Validation of BRRI Developed Fertilizer Management Technology at Farmers’ Fields in Tidal Flood Ecosystem

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

Md. Imran Ullah Sarkar
Scientific Officer
Soil Science Division, BRRI Gazipur

A.T.M.S. Hossian
Senior Scientific Officer
Soil Science Division, BRRI Gazipur

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

Abstract/ Executive Summary:

A number of six field experiments in T. Aus 2013, seven in T. Aman 2013 and five in Boro 2013-14 were conducted at the farmers’ fields in Barisal, Jhalkathi, Patuakhali and Barguna districts (AEZ 13) to increase land productivity by introducing MV along with improved fertilizer management technology for rice-based cropping systems. Treatments were tested without replication viz, T₁: BRRI recommended dose (AEZ basis), T₂: Cow dung (3 t/ha, oven dry basis)+ IPNS basis chemical fertilizer, and T₃: Farmers' Practice (FP). In T. Aus 2013, the highest grain yield of 4.04 t/ha (mean of 6 observations) was obtained in T₂, which was 15.76% higher than FP. In T. Aman, similar trend was observed and yield was 10.22% higher than FP. In Boro 2013-14, the highest grain yield of 6.91 t/ha (mean of five observations) was also obtained with treatment T₂, which was 10.91% higher than FP. This indicates that cow dung applied with IPNS based chemical fertilizer is a good practice for obtaining maximum yield in tidal submergence ecosystem and it might have improved soil health.

Keywords: Tidal submergence ecosystem, INM, Rice

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

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To increase land productivity by introducing MV along with improved fertilizer management technology for rice-based cropping systems under tidal flood ecosystem (Barisal region)

Methodology:

Six field experiments in T. Aus 2013, seven in T. Aman 2013 and five in Boro 2013-14 were conducted at the farmers’ fields in Barisal, Jhalkathi, Patuakhali and Barguna districts (AEZ 13). Soils of the experimental fields were silty clay loam in texture with neutral reaction. Major crop cycle of that area was Pulse-T. Aus-T. Aman. Treatments were tested without replication viz T₁: BRRI recommended dose (AEZ basis), T₂: Cow dung (3 t/ha, oven dry basis)+ IPNS basis chemical fertilizer, and T₃: Farmers' Practice (FP). In the T₁ & T₂ N was applied as USG and T₃ as PU. IPNS was followed in all elements (P, K, S and Zn) except N due to USG application. Unit plot size was 8-x 6-m. Phosphorus, K, S and Zn were applied as TSP, MoP, Gypsum and Zinc sulphate, respectively. All TSP, MoP, gypsum, Zinc sulphate and cowdung were applied at final land preparation. Prilled urea (PU) was applied in two splits (Farmer’s practice, FP, T₃). In T. Aus and T. Aman season, 66% PU at 15 DAT and the rest at 5-7 days before PI stage and in BRRI recom dose (T₁) and Cow dung (CD) + IPNS (T₂)_, USG was applied at 12 DAT. One USG (1.8 g) was placed at the middle of four hills at 7.5-10 cm depth. BRRI dhan27 and BRRI dhan54 were used as test variety in T. Aus and T. Aman season, respectively. In Boro, PU was applied in three equal splits in (T₃) at 15 and 35 DAT and at 5-7 days before PI stage. In T₁ and T₂_, USG was applied at 15 DAT. One USG (2.7 g) was placed at the middle of four hills at 7.5-10 cm depth. BRRI dhan47 and BRRI dhan29 were used as test variety in Boro season. Two-three seedlings/hill were transplanted at 20-×20-cm spacing. All intercultural operations were done as and when necessary. Grain yield was recorded from 5m² areas at the centre part of each plot and 16 hills were collected for recording straw yield. Grain yield was adjusted at 14% moisture content and straw yield as oven dry basis.

Source of Information: Proceedings of the BRRI Annual Internal Review, 2013-14

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank	Budget:
2.	Budget:

Total Budget (Tk.) :

Achievement/Findings:

In T. Aus 2013, BRRI dose (T₁) and CD + IPNS (T₂) gave higher grain and straw yields over FP. The highest grain yield of 4.04 t/ha (mean of 6 observations) was obtained in T₂, which was 15.76% higher than FP. BRRI dose gave 3.87 t/ha grain yield which is 10.88% higher than FP. Similar trend was also observed in straw yield. In T. Aman, similar trend was observed. The highest grain yield of 3.99 t/ha (mean of 7 observations) was obtained with treatment T₂, which was 10.22% higher than FP. BRRI dose gave 3.86 t/ha grain yield, which was 6.63% higher than FP. Straw yield was higher with BRRI dose and CD + IPNS fertilizer management compared to FP. In Boro 2013-14, the highest grain yield of 6.91 t/ha (mean of five observations) was obtained with treatment T₂, which was 10.91% higher than FP. BRRI dose gave 6.70 t/ha grain yield, which was 7.54% higher than FP. Similar trend was also observed with straw yield. This indicates that cow dung applied with IPNS based chemical fertilizer is a good practice for obtaining maximum yield in tidal flooded ecosystem.

Knowledge Management: Report/Proceedings