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Effect of Manganese Chloride as Post Composting Supplement on the Yield of White Button Mushroom

Bimal Chandra Dey
Department of Agriculture Extension, Khamarbari, Manikganj, Bangladesh.

M. Mofazzal Hossain
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.

Abdul Mannan Akanda
Department of Plant Pathology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

M. Kamruzzaman
Department of Agricultural Economics, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.

Mohammad Zakaria
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.

Nirod Chandra Sarker
National Mushroom Development and Extension Centre, Sobhanbag, Savar, Dhaka, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted to evaluate the effect of manganese chloride (MnCI₂) as post composting supplement on yield and nutrient content of white button mushroom (Agaricus bisporus). Solution of the chemical was prepared at the rate of 0, 20, 50, 100 and 200ppm in water. The compost was supplemented with individual solution @ 50ml per 3kg compost. The spawn packets were placed in the mushroom house and allowed to grow maintaining proper conditions. The highest number of fruiting body, biological yield, economic yield and biological efficiency were achieved with 100ppm of MnCl₂. The highest economic yield (457.60 g/3kg bag) was also recorded from 100 ppm followed by 200 (424.60 g/3kg bag), 50 (420.40 g/3kg bag) and 20 (382.60 g/3kg bag) ppm of MnCl₂. The level 100 ppm gave the highest benefit cost ratio of 8.07 compared to the lowest BCR of 5.99 recorded under control. The protein content of fruiting body was highest (15.07%) at 200 ppm followed by 100, 50, and 20 ppm. Contents of different minerals were not appreciably influenced by the supplement.

Keywords: Manganese chloride, Post composting supplement, Button mushroom

Location: Laboratory and culture house, National Mushroom Development and Extension Centre, Savar, Dhaka

Start Date: 00-12-2006

End Date: 00-03-2008

Program Area: Crop-Soil-Water Management

Commodity: Mushroom

Objectives:

1. To study the effect of supplementation of compost before spawning with manganese chloride on yield attributes and yield of A. bisporus

2. To find out the best level of the material as post composting supplement.

Methodology:

The experiment was conducted in the laboratory and culture house of National Mushroom Development and Extension Centre, Savar, Dhaka during December 2006 to March 2008. Manganese chloride (MnCl₂ ) solutions were prepared in water at the concentrations of 20, 50, 100, 200 ppm. Before spawning, MnCl₂ solutions were mixed with the compost @ 50 ml/3kg compost. Pure culture of A. bisporus, mother spawn and compost were prepared and inoculation, casing and watering were done following standard procedures. The spawn packets were placed in the mushroom house and allowed to grow maintaining proper conditions. The experiment was laid out in a completely randomized de sign with 5 replications. Mature fruiting bodies were harvested and data on yield attributes, yield and quality of mushroom were recorded. Data on days to primordial initiation, number of total fruiting body, biological yield, economical yield and benefit cost ratio (BCR) were recorded. The BCR was computed based on present market price of imported white button mushroom and cost of different inputs including price of MnCl₂ used in the study. Chemical analysis of the mushroom was performed to determine contents of protein and minerals as the criteria of quality. Protein content of harvested mushroom was estimated to observe the effect of MnCl₂on quality of mushroom. To estimate the protein content, nitrogen content of mushroom was estimated by “Colorimetric method”. Mushroom sample was digested in ‘Kjeldahl’ digestion flask with salicylic sulfuric acid and digestion catalyst. After digestion, color of the solution was developed with four different reagents. Then absorbance of the solution was measured at 625 nm wavelengths with a Double Beam Spectrophotometer Content of different mineral elements in mushroom, viz. Fe, Zn, Ca, Cu, Mg, K and Na were estimated following “Perchloric acid digestion method”. Phosphorus was determined following “Venamolybdate colorimetric method” proposed. Data were analyzed statistically following standard procedures using MSTAT-C computer program. Means were compared following Duncan’s multiple ranges test (DMRT) using the same computer program.

Source of Information: Bangladesh J. Mushroom, 4 (2): 61-66, 2010 (December)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The highest number of fruiting body, biological yield, economic yield and biological efficiency were achieved with 100ppm of MnCl₂. The highest economic yield (457.60 g/3kg bag) was also recorded from 100 ppm followed by 200 (424.60 g/3kg bag), 50 (420.40 g/3kg bag) and 20 (382.60 g/3kg bag) ppm of MnCl₂. The level 100 ppm gave the highest benefit cost ratio of 8.07 compared to the lowest BCR of 5.99 recorded under control. The protein content of fruiting body was highest (15.07%) at 200 ppm followed by 100, 50, and 20 ppm. Contents of different minerals were not appreciably influenced by the supplement.

Knowledge Management: Journal