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Long-term Missing Element Trial at BRRI Regional Stations

A. Latif Shah
Chief Scientific Officer
Soil Science Division, BRRI Gazipur

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

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

H. U. Ahmed

Abstract/ Executive Summary:

Objective of this study was to identify the existence of limiting nutrient(s) in soil of that particular area. The missing element trial of the regional stations indicated that omission of N and K from complete treatment (NPKSZn) gave significantly lower yield, yet omission of other nutrients also decreased yield insignificantly in both Boro and T. Aman seasons. For obtaining optimum yield, fertilization of NPKSZn is necessary.

Keywords: Missing nutrient element, Cowdung, STB, Rice

Location: BRRI farm Barisal, BRRI farm Satkhira, BRRI farm Sonagazi, BRRI farm Rangpur

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To identify the existence of limiting nutrient(s) in soil of that particular area.

Methodology:

The experiments were initiated on a permanent layout at the BRRI farm Barisal in Boro 2009, BRRI farm Satkhira in T.Aman season 2010 and BRRI farm Rangpur in T. Aman season 2010 using 6 treatments in RCB design with 3 replications. The fertilizer rate of Barisal site was NPKSZn @ 150-15-50-10-1 kg/ha for Boro and 60-15-50-10-1 kg/ha for T.Aman while in Satkhira site it was 100-15-60-10-1 kg/ha for Boro and 65-15-60-10-1 kg/ha for T.Aman. At Rangpur site in T. Aman season soil test based (STB) NPKSZn @ 97-7-39-15-0.3 kg/ha was used but in Boro season it was 145-10-57-15-0.6 kg/ha. Urea-N was applied in three 3 equal splits i.e. 1/3 at final land preparation, 1/3 at active tillering stage and 1/3 at 5-7 days before PI stage. Rest of the fertilizers was applied at final land preparation. For grain yield the crop was harvested from 5 m2 areas at the center part of each plot and 16 hills were collected for straw yield. The grain yield was recorded at 14% moisture content and straw yield as oven dry basis. Treatment details of long-term missing element experiments, 2010-2012 SL No. Treatment T₁ NPKSZn T₂ PKSZn (-N) T₃ NKSZn (-P) T₄ NPSZn (-K) T₅ NPKZn (-S) T₆ NPKS (-Zn)

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2011- 2012

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The missing element trial of the regional stations indicated that omission of N and K from complete treatment (NPKSZn) gave significantly lower yield, yet omission of other nutrients also decreased yield insignificantly in both Boro and T. Aman seasons. For obtaining optimum yield, fertilization of NPKSZn is necessary.

Knowledge Management: Report/Proceedings