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Comparison of Fertilizer Recommendation Models for Low Land Rice

P. K. Saha
Regional Research Station, (BRRI), Camilla, Bangladesh

M. A. Saleque
Soil Science Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur-1701, Bangladesh

G. M. Panaullah
Soil Science Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur-1701, Bangladesh

M. A. Mazid Miah
Soil Science Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

A two-year field experiment was conducted in Boro season at the Bangladesh Rice Research Institute (BRRI) Farm, Gazipur during the period of 2002-2003 to create and compare a suitable fertilizer recommendation model for lowland rice. Five different fertilizer recommendation models were tested and compared with one check plot. Results show that the application of different packages estimated by different fertilizer models significantly increased the plant height, tiller and panicle numbers, spikelet numbers, straw and grain yields of BRRI dhan29 than the control plot in both the years of the experiment. From economic analysis, it was shown that payback from 1 taka investment of treatment T₃ was the highest (2.32 taka) followed by T₄ (2.20 taka). Thus, BRRI fertilizer recommendation (proposed) - (T₃ ) may be used for the high and moderate resource based farmers and Arkansas University model-(T₄ ) may be used for the low resource based farmers.

Keywords: Rice, Soil, Soil fertility, Low land rice

Location: Bangladesh Rice Research Institute (BRRI) Farm, Gazipur

Start Date: 00-00-2002

End Date: 00-00-2003

Program Area: Crop-Soil-Water Management

Non-commodity: Performance

Objectives:

To create and compare a suitable fertilizer recommendation model for lowland rice.

Methodology:

A two-year field experiment was conducted in Boro season at the Bangladesh Rice Research Institute (BRRI) Farm, Gazipur (AEZ-28, land type-MHL) during the period of 2002-2003. The soil of the experimental field is clay loam in texture and slightly in acidic nature. The experiment was laid out in a randomized complete block (RCB) design with three replications. Five fertilizer recommendation models were tested and compared with one check plot. These were as follows: T₁ =Check (no fertilizer); T₂ = Soil Test Based (STB) dose for high yield goal (HYG) (Anonymous,1997); T₃ BRRI fertilizer recommendation (proposed); T4 Arkansas University, USA; T₅ = QUEFTS (Quantitative Evaluation of Fertility of Tropical Soils) and T₆ = SSNM (Site-specific nutrient management). The sources of N, P, K, S and Zn were urea, triple superphosphate, muriate of potash, gypsum and zinc sulfate, respectively. One-third of the N and all the P, K, S and Zn were applied at the time of final land preparation. The remaining two-third of the N was applied in two equal installments: 25-30 days after transplanting and 7 days before panicle initiation stage. The test variety was BRRI dhan29. Three or four forty-five day-old seedlings were transplanted in the spacing of 20 cm x 20 cm. Appropriate cultural and management practices including plant protection measures were taken during each growing season. The plot size was 7 m x 3 m. The crops were harvested at maturity from a 2.5 m x 2 m area. Plant height from 20 randomly selected plants in each plot and panicle number from 16 random hills per plot, spikelet numbers, percent unfilled grain, 1000- grain weight from 10 randomly selected plants in each plot were recorded at maturity. Grain yields (14 % moisture) and straw yields (oven dry basis) were recorded. Statistical analyses were performed and means were compared by the Least Significant Difference (LSD) test. Economic analyses were done for net benefit and benefit cost ratio for different fertilizer recommendation models (Saha et at. 1998).

Source of Information: Bangladesh J. Soil Sci. 30(1-2): 31-37, 2004, ISSN 2053-5440

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results show that the application of different packages estimated by different fertilizer models significantly increased the plant height, tiller and panicle numbers, spikelet numbers, straw and grain yields of BRRI dhan29 than the control plot in both the years of the experiment. From economic analysis, it was shown that payback from 1 taka investment of treatment T₃ was the highest (2.32 taka) followed by T₄ (2.20 taka). Thus, BRRI fertilizer recommendation (proposed) - (T₃ ) may be used for the high and moderate resource based farmers and Arkansas University model-(T₄ ) may be used for the low resource based farmers.

Knowledge Management: Journal