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Maximize Rice Yield Through Inm

Masuda Akter
Senior 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

Abstract/ Executive Summary:

Objective of this study was to study the rice yield maximization under double (Boro - Fallow- T. Aman) and triple (Boro-T. Aus - T.Aman) cropping pattern using integrated nutrient management (INM) practices. The experiment was initiated in Boro 2009 as first crop of the both cropping pattern at BRRI Farm Gazipur. The tested varieties for Boro and T. Aus were BRRI dhan29 and BRRI dhan43 respectively. BR22 and BRRI dhan49 were selected for triple and double cropping respectively in T. Aman season. Rice yield may be increased by the use of organic and inorganic combination of fertilizer under triple rice cropping system.

Keywords: INM, Triple cropping, Double cropping

Location: BRRI experimental farm, Gazipur

Start Date: 01-07-2009

End Date: 30-06-2010

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To study the rice yield maximization under double (Boro - Fallow- T. Aman) and triple (Boro-T. Aus - T. Aman) cropping pattern using integrated nutrient management (INM) practices

Methodology:

The experiment was initiated in Boro 2009 as first crop of the both cropping pattern at BRRI Farm Gazipur. The tested varieties for Boro and T. Aus were BRRI dhan29 and BRRI dhan43 respectively. BR22 and BRRI dhan49 were selected for triple and double cropping respectively in T. Aman season. The soil of the experimental field was clay loam in texture. Four treatment combinations were tested viz. T₁= native nutrients, T₂= 100%STB dose (NPKSZn @ 160-25-60-20-0 kg ha^-1 for Boro, NPKSZn @ 70-12-48-10-0 kg ha^-1 for T. Aus and NPKSZn @ 84-15-54-14-0 kg ha^-1 for T. Aman), T₃= 50%STB+Mixed manure (CD 2 t ha^-1+ash 1 t ha^-1 as oven dry basis + 1 layer Azolla), T₄= Farmers’ practice (NPKSZn @ 80-10-20-10-0 kg ha^-1 for Boro, NPKSZn @ 70-10-15-0-0 kg ha^-1 for T. Aus and NPKSZn @ 70-10-15-0-0 kg ha^-1 for T. Aman). The experiment was laid out in a RCB design with three replications. Urea N was applied in three 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. Cowdung, ash, TSP, MOP and gypsum were applied at final land preparation. The unit plot size was 8 m X 5 m. 2-3 seedlings were transplanted per hill with 20 X 20 cm spacing. At maturity, the crop was harvested form 5 m²areas at the centre 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. Grain and straw samples were collected for chemical analysis.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2008- 2009

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Triple rice cropping pattern gave the higher yearly yield than double rice cropping pattern. The treatment receiving 50% of NPKS + Mixed manure (CD 2t/ha + Ash 1 t/ha + 1 layers of azolla) gave the highest yearly yield of nearly 12 t/ha/year in triple cropping compared to 8.7 t/ha in double rice pattern. Moreover, this treatment save 50% chemical fertilizers under triple rice cropping pattern, the net additional income of TK 92,833 /- in the treatment where applied 50% NPKS + mixed manure followed by 100% NPKS was 82,600/ while the double rice cropping system, the treatment of AEZ based BARC Fert. Recom. Guide gave the highest net additional income of TK. 57,310/- followed by STB dose (TK. 50,494/-).

Knowledge Management: Report/Proceedings