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Effect of Diammonium Phosphate (dap) as Foliar Application on the Yield of Mature Tea

M. A. Motalib
Principal Scientific Officer
Soil Science Division, BTRI, Srimangal, Moulvibazar

Ashim Kumar Saha
Scientific Officer
Soil Science Division, BTRI, Srimangal, Moulvibazar

Apu Biswas
Scientific Officer
Soil Science Division, BTRI, Srimangal, Moulvibazar

Abstract/ Executive Summary:

TSP is a Common phosphatic fertilizer use in tea contains 46% phosphate. DAP is also a phosphatic fertilizer contains 46% phophate and extra 18% Nitrogen. In before DAP fertilizer would be imported from abroad and was expensive comparing to TSP. Recently this fertilizer is manufacturing in Bangladesh and available in a responsible prize. In tea cultivation there is a practice of foliar application of NPK fertilizer from urea, TSP and MOP in addition of blanket soil application. as DAP contains both Phosphorous and Nitrogen. Whether its foliar spray increases the production or not and if production is increased which is the economic dose. On the basis of these opinion and experiment was laid out at BTRI farm.The result shows that, the use of DAP as foliar spray has positive response on the yield. Highest yield was recoded in the treatment-T₄ where 6 kg P₂O₅ applied from DAP kg/ha as foliar spray. The experiment is statistically insignificant.

Keywords: DAP, Foliar, Yield and mature tea

Location: BTRI farm

Start Date: 01-01-2008

End Date: 31-12-2010

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To find out effect of Diammonium Phosphate (DAP) as foliar application on the yield of mature tea

Methodology:

Treatment 6 Replication: 3 Design: RBD Treatment combination: T₁ = Control T₂ = 2 kg/ha P₂O₅ + usual fertilizer (NPK) T₃ = 4 kg/ha P₂O₅ + usual fertilizer (NPK) T₄ = 6 kg/ha P₂O₅+ usual fertilizer (NPK) T₅ = 8 kg/ha P₂O₅ + usual fertilizer (NPK) T₆= 10 kg/ha P₂O₅ + usual fertilizer (NPK) Regular weekly data were recorded.

Source of Information: Annual Report 2010

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The result shows that, the use of DAP as foliar spray has positive response on the yield. Highest yield was recoded in the treatment-T₄ where 6 kg P₂O₅ applied from DAP kg/ha as foliar spray. The experiment is statistically insignificant.

Knowledge Management: Report/Proceedings