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Effect of Nitrogen Rate and Application Interval on Yield and Profitability of Bilatidhonia

S. N.MOZUMDER
Hill Agricultural Research Station, Ramgarh, BARI, Khagrachhari Hill District-4531, Bangladesh

M.MONIRUZZAMAN
Agricultural Research Station, Raikhali, BARI, Chandraghona, Rangamati Hill District-4531, Bangladesh

P. C. SARKER
Regional Agricultural Research Station, BARI, Hathazari, Chittagong- 4330, Bangladesh

Abstract/ Executive Summary:

The experiments on Bilatidhonia (Eryngium foetidum L.) crop comprising three levels of application interval (D₁= 15, D₂ = 30 and D₃ = 45 days after sowing) and four levels of nitrogen (N₁ = 150, N₂ = 175, N₃ = 200 and N₄ = 225 kg/ha) were carried out to determine the suitable N dose and application interval at ARS, Raikhali, Rangamati Hill District during two consecutive cropping season in 2003-04 and 2004-05. Plant height, number of leaves and leaf size had small variation with different nitrogen rates and application intervals. Number of plants/m²and fresh yield singly or in combination differed significantly with different nitrogen rates and application intervals. The application of 175 kg-N/ha and 30 days interval gave the highest fresh yield (35.27 t/ha) and benefit cost ratio (3.61).

Keywords: Bilatidhonia, Nitrogen rate, Application interval, Yield, Profitability.

Location: Agricultural Research Station, Raikhali, Rangamati

Start Date: 00-00-2003

End Date: 00-00-2005

Program Area: Crop-Soil-Water Management

Commodity: Coriander

Objectives:

To determine the suitable dose of nitrogen and its application interval on yield and profitability of Bilatidhonia in hilly areas.

Methodology:

The experiment was conducted at the Agricultural Research Station, Raikhali, Rangamati situated in the south-eastern part of Bangladesh (Latitude 22024’N and 91057’E Longitude) in two consecutive cropping season during the year 2003-04 and 2004-05. The soil of experimental field was silty loam having soil pH 5.4, 1.76% organic matter and 0.92% total nitrogen. The experiment was laid out in split-plot design having three levels of application interval (D₁= 15, D₂= 30 and D₃= 45 days after sowing) in main plots and four levels of nitrogen rate (N₁ = 150, N₂= 175, N₃ = 200 and N₄ = 225 kg N/ha) in sub plots with three replication. Seeds of Bilatidhonia were broadcasted on 15 December 2003 for first year experiment and in the same date of 2004 for the second year. The two adjacent plots measuring 3x1 m²constituted a unit plot. The crop was fertilized with nitrogen as per treatments (in the form of urea), 100 kg P₂O₅(in the form of TSP), 150kg K₂O (in the form of MP) and 10 tons of well-decomposed cowdung per hectare. All the intercultural operations were done as and when required. Longer or larger plants were harvested from the plot at every 15 days intervals from April 15 to June 15 in both the years. Properly grown plants were harvested and counted as number of plants per square meter. Other poorly grown or very small sized or undersized seedlings were discarded and did not count. Emerging flower stalks were removed on a fortnightly basis. Data on plant height, number of leaves/plant, length of leaf, width of leaf, weight of single plant, weight of plant per plot and number of plants/m² were taken from whole plot. The recorded data were analyzed by MSTAT program and the treatment means were separated by DMRT for interpretation of the results. Economic calculation was done on the basis of local market price of inputs (fertilizers, seeds, labor etc.) and output (Tk. 20/kg fresh plant). The polynomial regression analysis was done and optimum dose of nutrient elements for maximum seed yield and economic rate of inputs were calculated from simple polynomial regression equations, ie. Y = α + β₁x + β₂x2 (Zaman et al. 1982). Here, X is the independent variable (input) and Y is the dependent variable (yield). The optimum dose of nutrient element for maximum yield is X = -β₁/2β₂and economic dose were Xe = X – (^Px/Py)/2β₂_. Here Px is the price of input and Py is the price of the products.

Source of Information: J Agric Rural Dev 6(1&2), 63-68, June 2008 ISSN 1810-1860

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Considering two years results it was observed that the increasing number of installments with shorter application intervals reduced the amount of N per installment, on the other hand less number of installments with wider application intervals hampers continuous supply of nitrogen, both are hazardous for better yield. A moderate dose of nitrogen from 175 to 200 kg-N/ha with 30 days application intervals may be recommended for the production of Bilatidhonia in the hilly areas.

Knowledge Management: Journal