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Fertilizer Management for Rice and Rice Based Cropping Patterns in Cold and Submergence Ecosystem of Bangladesh (sffmcc Project)

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

Abstract/ Executive Summary:

Objective of this study was to To identify the proper fertilizer management packages through inorganic amendments for Rice-Fallow-Rice and rice-based cropping systems under different cold and submergence ecosystem. The experiment was conducted at Farmer’s field in Gangachara, Rangpur (AEZ-3). The initial The tested cropping pattern was Boro-Fallow-T. Aman. Applied fertilizer significantly influenced the grain and straw yield of Boro rice 2011-12. The highest grain yield of 8.68 t/ha was obtained with the treatment T₃.The best performance was observed in T₃ (T₁+ 25% NP) i.e. STB dose + 25% NP at Rangpur site.

Keywords: Cold ecosystem, Submergence ecosystem, Rice-based cropping systems

Location: Farmer’s field in Gangachara, Rangpur (AEZ-3)

Start Date: 01-07-2012

End Date: 30-06-2013

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To identify the proper fertilizer management packages through inorganic amendments for Rice-Fallow-Rice and rice-based cropping systems under different cold and submergence ecosystem.

Methodology:

The experiment was conducted at Farmer’s field in Gangachara, Rangpur (AEZ-3). The initial The tested cropping pattern was Boro-Fallow-T. Aman. The following treatments were tested: T₁ = 100 % N P K S Zn (STB); T₂ = T₁ + 25 % N; T₃ = T₁ + 25 % N P; T₄ = T₁ + 25 % N K; T₅ = T₁ + 25 % PK; T6 = T₁ + 25 % N P K; T7 = 75 % of T₁ and T₈ = Absolute control. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The tested varieties were BRRI dhan29 for Boro season and BRRI dhan52 for T. Aman season. In Boro season, one-third N and all other inorganic fertilizers were applied at final land preparation. The first top dress (One-third N) was applied at 30 DAT. The rest 1/3 N was applied at 60 DAT. And in T. Aman season one-third N, 1/2 K and all other inorganic fertilizers were applied at final land preparation. The first top dress (One-third N) was applied at 18 DAT. The rest 1/3 N and ½ K was applied at 55 DAT. Necessary intercultural operations were done as and when ever required. At maturity, the crop was harvested from 5 m2 area at the centre of each plot and grain yield was adjusted to 14% moisture. The grain and straw yields were recorded. Nutrient contents (N, P and K) from plant samples of the cropping pattern were determined by standard laboratory procedure.

Source of Information: Proceedings of BRRI Annual Internal Review for 2012-2013

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Applied fertilizer significantly influenced the grain and straw yield of Boro rice 2011-12. The highest grain yield of 8.68 t/ha was obtained with the treatment T₃. The lowest grain yield (4.39t/ha) was found in the treatment T₈ (control). Like Boro season, applied fertilizer significantly influenced the grain and straw yield of T. Aman rice 2012. The grain yield was higher in the treated plots than that of the control plot (T₈). The highest grain yield of 6.02 t/ha was obtained with the treatment T₆, which were statistically similar to T₁, T₂, T₃, T₄. T₅ and T₇. The lowest grain yield (4.01 t/ha) was found in the control plot (T₈). The highest annual grain yield 14.41 t/ha/crop-cycle was obtained with the treatment T₃ (T₁+ 25% NP). Applied fertilizer significantly influenced the nutrient uptake by Boro and T. Aman rice of the cropping pattern. The highest total NPK nutrient uptake (kg/ha/crop cycle) was observed in the treatment T₃ followed by T₄. The lowest total NPK nutrient uptake (kg/ha/crop cycle) was observed in the treatment T₈ (control). The application of fertilizer increased the gross and added return and net additional income in all the treatments. The gross return from the control plot per crop-cycle/ha was only about Tk.2,16,650/- and the application of fertilizer increased the gross return, which ranged from Tk 2,98,725/-/ha/crop-cycle in T₁ to Tk.3,54,635 /ha/crop-cycle in T₃. The highest added-return of Tk. 1,37,985/- /ha/crop-cycle was obtained with T₃ followed by T₅ (1,01,530/ha/crop-cycle). The highest net additional income of Tk. 1,08,597/-/ha/crop-cycle was obtained with T₃ followed by T₅ (75,368/-/ha/crop-cycle). The MBCR of all treated plots ranged from 3.37 (T₁) to 4.71 (T₇), which were higher than the permit able limit (2.00).

Knowledge Management: Report/Proceedings