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Development of Fertilizer Recommendation for Four Crop Based Cropping Pattern: Potato- Boro- T.aus-t.aman (2016-17)

A. BARMAN
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

M. J. ALAM
Soil Science Division, BARI, Joydebpur, 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 Jessore (AEZ 11) during the year of 2014-2015 and 2015-2016 with the objectives of finding out suitable fertilizer combination for sustainable yield of the pattern, monitoring soil health as affected by chemical fertilizers and to make a balanced sheet of each nutrient. There were eight different treatments viz. T₁: 100% NPKSZnB (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. The experiment was laid out in RCB design with three replications. Data revealed that the tuber yield of potato, grain yield of boro, T.Aus and T.Aman were significantly influenced by the fertilizer treatments. The highest tuber yield, grain yield of boro, T.Aus and T.Aman was obtained from the T₆ treatment where 25% additional NPK was added over the 100% STB rate in both the year. This yield was statistically similar with that produced by all the other fertilizer treatments except the native fertility treatment. Highest total rice (system) yield of 26.01 t ha^-1 yr.^-1 was obtained from T₆ treatment. Lowest total rice (system) yield of 14.30 t ha^-1yr.^-1 was obtained from control i.e. native fertility treatment (T₈).

Keywords: Cropping pattern, fertilizer recomendation, Soil health

Location: Central Farm, RARS, Jessore

Start Date: 00-00-2014

End Date: 00-00-2016

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Potato, Rice

Objectives:

a) To find out judicious fertilizer recommendation for Potato-Boro-T.Aus-T.Aman cropping pattern for sustainable yield; and

b) monitor soil health after each cropping cycle.

Methodology:

The field experiment was conducted at the central farm of RARS Jessore (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 recorded. The experiment was laid out in a randomized complete block design with three replications. Eight different treatments viz. T₁: 100% NPKSZnB (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.The unit plot size was 2.5m ´ 3.0m. Potato crop (Diamant) was used as test crop for the first component of the pattern. Potato seeds were sown in line with 60 cm row to row and 25 cm plant to plant 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 PKSZnBand ¹/₂of 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 irrigations 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. Statistics 10 was used to determine the significant differences between the treatments.Plant samples and post harvest soil samples were collected from each plot for chemical analysis.After potato, BRRI dhan 28 was transplanted in the plots on February 3, 2015 and February 2, 2016. The treatment combinations for rice showing fertilizer rates are outlined in the Table 2. 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.For T. aus rice, BRRI dhan 48 was used in the experiment. Transplanting was done on 15 May 2015 and 17 may 2016 with a row to row spacing of 20 cm and plant to plant spacing of 15 cm. The treatment combinations for rice showing fertilizer rates are outlined. 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. For T. aman rice, the variety BINA Dhan 7 will be used in the experiments. Transplanting will be done on 29 July 2015 and 30 July 2016 with a row to row spacing of 20 cm and plant to plant spacing of 15 cm.

Source of Information: Annual Report, 206-2017, BARI, Gazipur, Banglaadesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The field experiment on four crop based cropping pattern is conducted to find out a suitable fertilizer combination for higher and sustainable yield of the pattern. The experiment completed two cropping cycle. Although the 25% additional NPK produced higher yield of the component crops, the results were not significant. Data obtained so far has little indication of any change in the fertilizer rates from the STB (100%) values for the individual crops of the pattern. The experiment will continue for the next cycle.

Knowledge Management: Report/Proceedings