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Requirement of Different Nutrients for Yield Maximization of Bt Brinjal

M. A. K. Mian
Principal Scientific Officer
Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

A. A. Begum
Senior Scientific Officer
Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

R. R. Saha
Chief Scientific Officer
Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted at Agronomy field of Bangladesh Agricultural Research Institute, Gazipur during 2016-2017 and 2017-2018 to determine the nutrient requirement for yield maximization of Bt brinjal (var. BARI Bt Begun-2). The treatments were T₁= STB (soil test base) recommendation (120-36-90-15-2-1 kg/ha N-P-K-S-Zn-B+ 3 t/ha poultry manure), T₂ = T₁ + 25% of N-P-K-S-Zn-B (150-45-112-18-2.5-1.25 kg/ha N-P-K-S-Zn-B +3 t/ha poultry manure), T₃= T₁ + 50% of N-P-K-S-Zn-B (180-54-135-22-3-1.50 kg/ha N-P-K-S-Zn-B +3 t/ha poultry manure), T₄= T₁ + 25% of N-P-K-S-Zn-B + 3 t/ha poultry manure (150-45-112-18-2.5-1.25 kg/ha N-P-K-S-Zn-B+6 t/ha poultry manure), T₅= T₁ + 3 t/ha poultry manure (120-36-90-15-2-1 kg/ha N-P-K-S-Zn-B + 6 t/ha poultry manure). Nutrient uptake, yield components and yield of Bt brinjal varied significantly due to variation of nutrients in the tested years. The highest plant height (98-116 cm), canopy coverage (1.21-1.26 m²/plant), number of fruits/plant (57.69-59.23) and individual fruit weight (83-86 g) were obtained from 180-54-135-22-3-1.50 kg/ha N-P-K-S-Zn-B +3 t/ha poultry manure (T₃) treatment where days to flowering showed the lowest values (109-110 days). The highest pooled yield (58.46 t/ha) of Bt brinjal was observed from the treatment 180-54-135-22-3-1.50 kg/ha N-P-K-S-Zn-B +3 t/ha poultry manure(T₃) and the lowest (23.39 t/ha) from 120-36-90-15-2-1 kg/ha N-P-K-S-Zn-B+ 3 t/ha poultry manure) (T₁). The highest nutrient uptake (214-43-208-60-0.38-0.213-49 kg/ha N-P-K-S-B-Ca) was also observed from the same treatment (T₃). Fruit yield showed a strong (r=0.97) linear relationship with applied nutrients. Effect of nutrient application on fruit yield of Bt brinjal was estimated about 86%. The highest gross return (Tk. 587900/ha), gross margin (Tk. 417660/ha) and benefit cost ratio (3.45) were obtained by applying 180-54-135-22-3-1.50 kg/ha N-P-K-S-Zn-B+3 t/ha poultry manure. Results revealed that application of 180-54-135-22-3-1.50 kg/ha N-P-K-S-Zn-B along with 3 t/ha poultry manure would be economically optimum for achieving higher yield of Bt brinjal grown under Grey Terrace soil (Aeric Albaquept) of Gazipur.

Keywords: Nutrient requirement, Nutrient uptake, Bt brinjal

Location: Agronomy field of Bangladesh Agricultural Research Institute, Gazipur

Start Date: 00-00-2016

End Date: 00-00-2018

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer and manures, Brinjal

Objectives:

To find out economic fertilizer dose for achieving high yield of Bt brinjal.

Methodology:

The experiment was conducted at Agronomy field of Bangladesh Agricultural Research Institute, Gazipur during 2016-2017 and 2017-2018. The soil of the experimental field is clay loam under Chhiata series. Soil samples were collected from a depth of 0-20 cm prior to application of fertilizer in both the years. Results of soil analysis are presented. Organic matter content and total N were very low. Exchangeable K and available P, S, Zn and B were found to be below the critical level. Five treatments consist of T₁=120-36-90-15-2-1 kg/ha of N-P-K-S-Zn-B+ 3 t/ha poultry manure based on STB (FRG, 2012), T₂ = T₁ + 25% of N-P-K-S-Zn-B (150-45-112-18-2.5-1.25 kg/ha of N-P-K-S-Zn-B +3 t/ha poultry manure), T₃= T₁ + 50% of N-P-K-S-Zn-B (180-54-135-22-3-1.50 kg/ha of N-P-K-S-Zn-B +3 t/ha poultry manure), T₄= T₁ + 25% of N-P-K-S-Zn-B + 3 t/ha poultry manure (150-45-112-18-2.5-1.25 kg/ha of N-P-K-S-Zn-B+6 t/ha poultry manure), T₅= T₁+ 3 t/ha poultry manure (120-36-90-15-2-1 kg/ha of N-P- K-S-Zn-B + 6 t/ha poultry manure). The experiment was conducted in a randomized complete block (RCB) design with three replications. Unit plot size was 6.4 m ×5.4 m. All of poultry manure, phosphorus, sulphur, zinc and boron fertilizers were applied at the time of final land preparation. Nitrogen and potassium fertilizers were applied in four equal splits at 20, 40, 60 and 80 DAT (days after transplanting) around the plant roots and mixed thoroughly with the soil. The brinjal var. BARI Bt Begun-2 was used as test crop. Thirty days old seedling was transplanted on 11 November 2016 and 16 November 2017 at a spacing of 90 cm ×80 cm. Intercultural operations such as weeding, mulching, irrigation etc. were done as per requirement. The crop was harvested from 8-12 February to 1-5 April in 2017 and 2018. Frequent rainfall (66-107 mm in February to April) at later stage affected the crop and drastically reduced fruit yield. Nutrient concentration in fruit and plant tissues of Bt brinjal was analyzed following the standard laboratory procedures. Nutrient uptake was computed on the basis of dry matter accumulation of Bt Brinjal and nutrient concentration in the tissues (both fruit and plant). Correlation of yield with nutrient uptake and nutrient uptake with applied nutrients were done. Functional relationship between total applied nutrient and fruit yield of Bt brinjal were established. Nutrient from poultry manure were calculated and considered in total applied nutrient (FRG, 2012). Data on yield and other associated characters were recorded. Canopy coverage was measured by meter-stick method (Armbust, 2009). Vertical projection area of the outer most perimeter of the natural spread of foliage of plants was measured. Soil surface coverage (D=diameter of coverage of the plant) was measured at four positions of spreading margin of the plant canopy (perimeter) perpendicular to the soil surface. Randomly selected 5 plant’s canopy coverage (D=diameter) was measured from each plot. Then mean value was calculated using the following formula. This measurement (A= π r² where, D=2r) was done at first harvesting time of fruits. Data on yield and other associated characters were recorded. Collected data was subjected to analysis of variance. Least significant difference (LSD) value was used for mean separation and treatments means were compared by LSD (0.05) (Gomez and Gomez, 1984). Cost benefit analysis was also evaluated.

Source of Information: Bangladesh J. Agril. Res. 44(4): 591-598, December 2019

Article Link (Online Journal): DOI: https://doi.org/10.3329/bjar.v44i4.45694

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results of two years’ study revealed that application of 180-54-135-22-3- 1.50 kg/ha N-P-K-S-Zn-B along with 3 t/ha poultry manure was the suitable combination of nutrients for raising maximum fruit yield and also economically profitable for brinjal production in Chhiata series of the Grey Terrace soil of Gazipur.

Knowledge Management: Journal