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Fertilizer Recommendation for Four Crop Based Cropping Pattern: Potato- Boro- T. Aus-t. Aman Under Aez – 11

A. Barman
Soil Science Division, BARI, Gazipur, Bangladesh

S. Shome
Department of Agronomy, SAU, Dhaka, Bangladesh

M.J. Alam
RARS, BARI, Jashore, Bangladesh

S. Akhter
Soil Science Division, BARI, Gazipur, Bangladesh

M.A. Hossain
Soil Science Division, BARI, Gazipur, Bangladesh

Abstract/ Executive Summary:

A field experiment on Potato-Boro-T. Aus-T. Aman cropping pattern was conducted in the High Ganges Floodplain Soil of Jashore (AEZ - 11) during 2014-2015 and 2015-2016 to find out optimum fertilizer management for intensive cropping attern, in relation to soil health.There were eight different treatments viz. T₁=100% NPKSZnB (STB= Soil Test Based), T₂=T₁+ 25% N, T₃=T₁+ 25% NP, T₄=T₁+ 25% NK, T₅=T₁+ 25% PK, T₆=T₁+ 25% NPK, T₇=75% of T₁, and T₈=Native fertility (control) as individual crop management. The experiment was laid out in randomized complete block design with three replications. Results revealed that the tuber yield of potato, grain yields of boro, T. Aus and T. Aman were significantly influenced by the fertilizer treatments. The maximum tuber yield (25.70 and 24.80 t ha^-1), grain yields of boro (6.50 and 6.31 t ha^-1), T. Aus (3.13 and 3.10 t ha^-1) and T. Aman (3.95 and 3.98 t ha^-1) was obtained from the T₆ treatment where 25% additional NPK was added with 100% STB in both the year. These yields were statistically similar with that produced by all other fertilizer treatments except the native fertility treatment. Highest rice equivalent yield (REY) of 12.63 t ha^-1was obtained from T₆ treatment whereas lowest REY of 5.93 t ha^-1was obtained from control.

Keywords: Cropping pattern, Fertilizer, Rice equivalent yield, Potato

Location: RARS Jashore (AEZ - 11)

Start Date: 00-00-2014

End Date: 00-00-2016

Program Area: Farming System

Commodity: Rice, Potato, Fertilizer

Objectives:

To find out judicious fertilizer recommendation for Potato- Boro-T. Aus- T. Aman cropping pattern for AEZ-11.

Methodology:

The field experiment was conducted at the central farm of RARS Jashore (AEZ - 11) during 2014-2015 and 2015-2016. The initial soil samples, collected before establishing the experiment from a depth of 0-15 cm were analyzed in the laboratory following standard methods. Initial values of some important soil chemical parameters of the experimental soil are presented. The experiment was laid out in a randomized complete block design with three replications. Eight different treatments viz. T₁=100% STB, T₂ = T₁+ 25% N, T₃ = T₁+ 25% NP, T₄=T₁+ 25% NK, T₅=T₁+ 25% PK, T₆=T₁+ 25% NPK, T₇=75% of T₁, T₈ = Native fertility was selected for different plots randomly as individual crop management. The unit plot size was 2.5m x 3.0m. Potato (var. Diamant) was used as test crop for the first component of the pattern. Potato seeds were a spacing of 60 x 25 cm on November 11, 2014 and November 10, 2015. Fertilizer N-P-K-S-Zn and B were supplied from urea, TSP, MP, Gypsum, Zinc sulphate and Boric acid respectively. All P K S Zn B and ¹/2 of N were applied at the time of final land preparation. The remaining half of N was applied as top dress at 30–35 days after sowing. Two irrigation and other intercultural operations were done as and when required. The potato was harvested on January 29, 2015 and January 30, 2016. Data on yield and yield contributing characters of potato were recorded and statistically analyzed. After potato, Boro rice var. BRRI dhan28 was transplanted on February 3, 2015 and February 2, 2016 maintaining 20 x 15 cm spacing. All fertilizers including 1/3^rd of N were applied before transplanting. Rest of N was applied in two installments at 15 and 45 days after transplanting. Boro rice was harvested on 12 May, 2015 and 14 May, 2016. For T. Aus rice, var. BRRI dhan48 was used transplanting was done on 15 May 2015 and 17 may 2016 maintaining 20 x 15 cm plant spacing. All fertilizers including 1/3^rd of N were applied before transplanting. Rest of N was applied in two installments at 15 and 45 days after transplanting. T. Aus rice was harvested on 25 July, 2015 and 26 July, 2016. For T. Aman rice, the variety Binadhan-7 was transplanted on 29 July 2015 and 30 July 2016 maintaining 20 x 15 cm plant spacing. T. Aman rice was harvested on November 5, 2015 and November 7, 2016. Predetermined plant parameters data were taken as per experimental design. Statistix 10 was used to determine the significant differences between the treatments. Rice equivalent yield (REY) using formula given by Ahlawal & Sharma (1993), Where, Rice equivalent yield (t ha^-1yr^-1) = Yield of Each Crop (t ha^-1) x Economic value of Respective crop Tk. ha^-1/Crop market price of rice.

Source of Information: Bangladesh Agron. J. 2019, 22(1): 71-78

Article Link (Online Journal): DOI: https://doi.org/10.3329/baj.v22i1.44938

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From consecutive two years study of four cropping pattern, it could be concluded that STB + 25% extra NPK performed better on the whole pattern basis than all other fertilizer levels and this fertilizer package could be used for Potato- Boro-T. Aus-T. Aman cropping pattern under Jashore region (AEZ-11).

Knowledge Management: Journal