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Influence of Vermicompost and Npk on the Growth and Protein Content of Boro Rice (oryza Sativa L.)

KN Nishi
Department of Soil, Water and Environment, University of Dhaka, Dhaka 1000, Bangladesh

S. Rahman
Department of Soil, Water and Environment, University of Dhaka, Dhaka 1000, Bangladesh

K Nakamura
Institute for Agro-Environmental Sciences, NARO, Kannondai 3-1-3, Tsukuba, Ibaraki 305-0035, Japan

MK Rahman
Department of Soil, Water and Environment, University of Dhaka, Dhaka 1000, Bangladesh

Abstract/ Executive Summary:

Influence of vermicompost (2.5, 5, 7.5 and 10 ton/ha), Nitrogen (12, 24, 36, 48 and 60 kg/ha), phosphorus (4, 8, 12, 16 and 20 kg/ha) and potassium (10, 20, 30, 40 and 50 kg/ha) on the growth and protein contents of Boro rice (Oriza sativa L.) was examined. Highest height (93.03cm), leaf number (23 no/plant), highest productive plants observed (8.67 no/pot), vegetative plants (8.0 no/pot), dry weight of panicle per plant (9.45 g), length of panicle (22.37 cm), number of grains per panicle (153.33),1000-grain weight (21.56 g) and the maximum dry weight (28.15 g/plant) were observed in VC₁₀ ton/ha + N₁₂P₄K₁₀ kg/ha treatments. Highest concentrations of protein content (29.875%), P (0.478%), K (5.20%) and S (0.182%) were in N₆₀P₂₀K₅₀ kg/ha. Results showed that the overall best growth performance and yield were achieved in VC₁₀ ton/ha + N₁₂P₄K₁₀ kg/ha treatments.

Keywords: Boro Rice; Vermicompost; Growth; Biomass production; NPK; Protein content

Location: Dendabor, Savar upazila, Dhaka

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Vermicompost and vermiculture

Objectives:

To assess the influence of vermicompost and NPK on growth and yield of Boro rice.

Methodology:

Soil sample (0 to 15 cm depth) was collected from Dendabor, Savar upazila under Dhaka devision. The sample was air dried, ground and sieved by 2 mm sieve. The soil had a pH 6.72, organic matter 0.56% (Walkley and Black 1934), available N 21 mg/kg (Marr and Cresser 1983), available P 5.8 mg/kg (Murphy and Riley 1962), available K 31.1 mg/kg, field capacity 25% (Anderson and Ingram 1989), sand 8.12%, silt 52.34% and clay 39.54%, textural class- silt loam (Bouyoucos 1962). The N, P and K concentration of vermicompost were 1.1, 0.29 and 0.82 per cents, respectively. A pot experiment was carried out in the net house of the Department of Soil, Water and Environment, University of Dhaka. Six kilograms of soil was taken per earthen pot (25 cm x 19 cm). Vermicompost (2.5, 5, 7.5 and 10 ton/ha), Nitrogen (12, 24, 36, 48 and 60 kg/ha) as Urea, phosphorus (4, 8, 12, 16 and 20 kg/ha) as TSP and potassium (10, 20, 30, 40 and 50 kg/ha) as MP were applied. Pots were arranged in a completely randomized block design. Twenty days old seedlings of Boro Rice (Oryza sativa L.) collected from Goaria, Pabna district under Rajshahi division and four seedlings were transplanted per pot. The pots were watered about 100 ml daily in the morning. Height, number of leaves and leaf area of the plants were measured at 120 days after harvest. The range of temperature, humidity and rainfall were 24° C to 33° C, 60% to 73% and 8 to 156 mm, respectively during the experiment period (January to April) respectively. Height was measured from the soil level to the tip of the leaf, and leaf number was counted with the help of a tally counter at 40 days interval. Four months old plants were harvested as root, shoot and grain root were washed with tap water and finally with distilled water, and wrapped with soft tissue paper. Immediately after the harvest and then air-dried in the room temperature and finally oven-dried at 65° C for 48 hours. The dry weight of the samples was recorded and the samples were ground with a mechanical grinder and stored in the paper bags for further chemical analysis. For nitrogen, 0.2 g of yield sample was digested in a Kjeldahl digestion flask (Jackson 1962) and for P and K, 0.5g yield was digested (Shelton and Harper 1941). The phosphorous of the digest was determined by the vanadomolybdophosphoric yellow colour method at 430 nm using spectrophotometer (model DR 5000). Potassium in the digest was determined by using JENWAY flame photometer (model PFP 7). Protein contents of the yield samples were estimated by multiplying the total Nitrogen by 6.25 (AOAC 1990). Results were statistically analyzed using Microsoft Excel 2007 and Software Minitab 19.

Source of Information: J. Biodivers. Conserv. Bioresour. Manag. 2019, 5(2): 69-74

Article Link (Online Journal): DOI: https://doi.org/10.3329/jbcbm.v5i2.44916

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The overall results of this experiment indicated that vermicompost and NPK shared better effects on growth and yield attribute significantly of Boro rice. Better yield was achieved in VC₁₀ ton/ha + N₁₂P₄K₁₀ kg/ha treatments and nutrient uptake was found in N₆₀P₂₀K₅₀ kg/ha treatments.

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