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Evaluation of Low Dose Organic Manures for Phosphorus Nutrition of Wetland Rice

Md. Abdul Mazid Miah
Principal Scientific Officer
Bangladesh Rice Research Institute, Soil Science Division

Abstract/ Executive Summary:

The study was conducted at BRRI farm, Gazipur on chhiata clay loam soil (Hyperthermic Vertic Endoaquept) in 2002-2003 to evaluate low doses of cowdung and poultry manure as supplemental sources of chemical P fertilizer. One t/ha of either cowdung (CD) or poultry manure (PM) was compared with five doses of chemical P fertilizer; 0, 5, 10, 20 and 30 kg P/ha. Two modern rice varieties BRRI dhan28 and BRRI dhan29 were tested in the experiment. The design of the experiment was split-plot. Manure/fertilizer was in the main plot and variety in the sub-plot. The difference in grain yield between low and high P doses was not significant in either of the variety. The grain yield obtained with CD or manure was greater than P₀ plot but comparable to P fertilized plot that gave the highest yield. The application of chemical P fertilizer or manure reduced maturity 7-9 days in BRRI dhan28 and 6-10 days in BRRI dhan29. Application of CD or PM gave greater tissue P content in rice at PI stage and grain yield than that in control plot. The findings suggest that application of one t /ha of cowdung or poultry manure have potentials to replace chemical P (10 kg P/ha or higher P doses) fertilizer for lowland rice in P deficient soils.

Keywords: Cowdung, Poultry manure, Chemical P fertilizer, Rice

Location: BRRI farm, Gazipur

Start Date: 00-00-2002

End Date: 00-00-2003

Program Area: Crop-Soil-Water Management

Commodity: Manures

Objectives:

To evaluate low doses of cowdung and poultry manure as supplemental sources of chemical P fertilizer

Methodology:

The study was conducted at BRRI farm, Gazipur on chhiata clay loam soil (Hyperthermic Vertic Endoaquept) in 2002-2003. The soil of the experimental field has pH 5.84, organic carbon 1.08%, total N 0.08%, available P 6 ppm, and exchangeable K 0.21 cmol_c/ kg. One t/ha of either cowdung (CD) or poultry manure (PM) was compared with five doses of chemical P fertilizer; 0, 5, 10, 20 and 30 kg P/ha. Two modern rice varieties BRRI dhan28 and BRRI dhan29 were tested in the experiment. The design of the experiment was split-plot. Manure/fertilizer was in the main plot and variety in the sub-plot. Each plot received a flat dose of 150 kg N, 50 kg K and 10 kg S per Ha. Urea was applied in three splits as 34% at basal, 33% at 25 DAT and rest 33% at 5-7 days before PI stage. At maturity the crop was harvested manually from 5 m² area at 15 cm above ground. However, 16 hills from each plot were harvested at ground level for straw yield data. Grain yield was recorded at 14% moisture content and straw yield as oven dry basis.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2002-2003

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study result suggested that, application of one t /ha of cowdung or poultry manure have potentials to replace chemical P (10 kg P/ha or higher P doses) fertilizer for lowland rice in P deficient soils.

Knowledge Management: Report/Proceedings