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Update Fertilizer Recommendation for Potato-maize-t. Aman Cropping Pattern

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

Masuda Akter
Senior Scientific Officer
Soil Science Division, BRRI Gazipur

S. Kaiser Zaman
Cheif Scientific Officer
Soil Science Division, BRRI Gazipur

M. A. Gous Ali
Principal Scientific Officer
BRRI, Rangpur

Abstract/ Executive Summary:

Objective of this study was to examine the effect of potato-maize-T. Aman cropping pattern on sustainable soil fertility and to develop appropriate fertilizer management practices for potato-maize-T. Aman cropping pattern. PM @ 3.0 t/ha + IPNS based inorganic fertilizers for potato and maize crops, and STB dose for T. Aman crop may be a good fertilizer management package for Potato-Maize-T. Aman cropping pattern at Rangpur and Gazipur sites. To sustain soil fertility, it is necessary to apply organic manure in combination with chemical fertilizer. For maize and potato crops, fertilizer recommendation should be updated alternate in every three years.

Keywords: Poultry manure, IPNS, STB, Potato, Maize

Location: BRRI farm, Gazipur and BRRI R/S farm, Rangpur

Start Date: 01-07-2007

End Date: 30-06-2010

Program Area: Farming System

Commodity: Fertilizer

Objectives:

To examine the effect of potato-maize-T. Aman cropping pattern on sustainable soil fertility
To develop appropriate fertilizer management practices for potato-maize-T. Aman cropping pattern.

Methodology:

Two field experiments were initiated at the BRRI farm, Gazipur and BRRI R/S farm, Rangpur during the Kharif-1, 2007. These experiments were continued up to the Rabi, 2009-10. During this period, three crop-cycles were completed. The soil texture of BRRI farm, Gazipur and BRRI R/S farm, Rangpur was silt loam having slightly acid in reaction and sandy loam having strongly acidic reaction, respectively. Six treatment combinations were tested: T₁ = Native nutrient; T₂ = AEZ basis (BARC fert. Recom. Guide, 2005); T₃ = Soil test based (STB) dose; T₄ = 20% more than STB dose; T₅ = Poultry Manure (PM) @ 3 t/ha (oven dried) + IPNS basis inorganic fertilizer for maize and potato crop/T₅ = same as T₃ for T.Aman crop and T₆ = Farmers’ practice (based on interview of 15/20 local farmers). The experiments were laid out in a randomized complete block design with three replications. The sources of N, P, K, S, Zn, B and Mg were urea, TSP, MP, gypsum, zinc sulfate, borax and magnesium sulfate, respectively. Except urea, all other inorganic fertilizers were applied at final land preparation for all crops in the cropping pattern. Well decomposed PM was applied at final land preparation for maize and potato.Urea was applied into three equal splits for maize and T. Aman crop: 1/3 N as basal, 1/3 N at 25-30 day after sowing (maize)/1/3 N at 15-20 DAT (T. Aman) and 1/3 N at 45-50 DAS (maize)/1/3 N at 27-30 DAT (T. Aman). For potato, urea was applied into two equal splits: ½ as basal and rest ½ at 30-35 DAS. Necessary intercultural operations were done as and when ever required for each crop.

Source of Information: Proceedings of the BRRI Annual Internal Review for2009- 2010

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Three years studies of integrated fertilizer management in a potato-maize-T. Aman rice cropping pattern at Rangpur and Gazipur sites showed that the treatment receiving poultry manure @ 3t/ha with IPNS based chemical fertilizers produced the highest rice equivalent yield of 22.42t/ha at Rangpur and 18.37t/ha at Gazipur sites. The same treatment giving the net additional income (Tk 2, 24694/ and 1, 29,469/ at Rangpur and Gazipur sites. Chemical fertilizers savings of 36% N, 100% P and S and 70% K can be reduced from the recommended dose of fertilizers. Soil properties can also be improved. A significant quantity of P was accumulated due to addition of poultry manure in soil.

Knowledge Management: Report/Proceedings