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Effects of Irrigation and Different Mulches on Yield of Profitability of Cauliflower

M. Moniruzzaman
Agricultural Research Station, Raikhali, Chandraghona, Rangamati Hill District-4531.

S. M. Faisal
Department of Biotechnology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

M. A. R. Sarkar
Intraco Properties, 69, Suhrawardy Avenue, Baridhara, Dhaka-1212, Bangladesh.

M. Ismail Hossain
Department of Horticulture, Sher-E-Bangla Agricultural University, Sher-E-Bangla Nagar, Dhaka-1207, Bangladesh.

M. Afsar Ali
Department of Biotechnology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

M. A. H. Talukder
Department of Biotechnology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

Abstract/ Executive Summary:

A field experiment on cauliflower (var. Rupa) was conducted in two consecutive years from November 2000 to March 2002 in sandy clay loam soil at the Agricultural Research Station, Raikhali, Rangamati Hill District to observe the effect of irrigation and mulch materials on its yield, yield attributes and profitability. Twenty combinations of treatments consisting of four levels of irrigation (no irrigation = control, irrigation at 7, irrigation at 14 and irrigation at 21 days interval) and five levels of mulching (non mulch (control), black polythene mulch, rice straw mulch, sun grass mulch and mango leaves’ mulch) were used for this trial. Irrigation at 7 days interval and mulching with black polythene independently as well as in combination produced maximum values for yield attributes and marketable yield of cauliflower. The highest curd yields of 30.38 and 29.40 t ha^-1 were obtained from 7 days irrigation interval with black polythene mulch in 2000-01 and 2001-02, respectively. The lowest curd yields of 10.50 and 10.04 t ha^-1 were obtained from without irrigation and mulching in 2000-01 and 2001-02, respectively. Seven days interval irrigation and mulching with forest leaves (mango leaves) in combination gave the highest benefit cost ratio (6.51) closely followed by 14 days interval irrigation with the same mulch (6.48). But maximum marginal rate of return (1156.89%) was recorded from the combination of 14 days interval irrigation and mulching by mango leaves followed by irrigation at 21 days interval with the same type of mulch (936.92%).

Keywords: Irrigation, Mulch, Cauliflower, Yield, Profitability

Location: Agricultural Research Station, Raikhali and Rangamati Hill district

Start Date: 00-00-2000

End Date: 00-00-2002

Program Area: Crop-Soil-Water Management

Commodity: Cauliflower

Objectives:

To study the effect of irrigation and mulches on the yield, yield attributes and profitability of cauliflower.

Methodology:

The experiment was conducted at the Agricultural Research Station, Raikhali and Rangamati Hill district during two consecutive Rabi seasons of 2000-01 and 2001-02). The treatment consisted of four levels of irrigation (T₀ = no irrigation (control), T₁ = Irrigation at 7 days interval, T₂ = Irrigation at 14 days interval and T₃ = Irrigation at 21 days interval) and five levels of mulch (M₀ = non mulch (control), M₁ = Black polythene, M₂ = Rice straw, M₃ = Dried Sun grass and M₄ = Dried mango leaves). The experiment having combinations of irrigation in main plots and mulch levels in sub plots was conducted in split-plot design with three replications. Seedlings of thirty days old were transplanted on 7 November 2000 and 13 November 2001 at a spacing of 60x50 cm. The crops were harvested on 6 February 2001 and 15 February 2002 in 2000-01 and 2001-02, respectively. The unit plot size was 4x2.4 m. The cauliflower variety was Rupa (BARI Fulkapi 1). Irrigation was done by boarder method. The irrigation water was applied during the growing period according to the irrigation scheduling (7, 14 and 21 days interval). Irrigation was started at 15 days after transplanting. For proper seedling establishment water was given for seven days after transplanting by a water can. Mulch materials at the rate of 5 t ha^-1 were placed just after the establishment of the seedlings (15 days after transplanting) except black polythene. Black polythene was placed before transplanting of the seedlings. Manures and fertilizers were applied at the rate of 10 tons well-decomposed cow dung, 150 kg N, 70 kg P₂O₅ and 110 kg K2O. The N, P₂O₅ and K₂O were applied in the form of Urea, TSP and MP. The entire amount of cow dung and TSP and half of urea and MP were applied during final land preparation. The remaining urea and MP were applied in two equal splits at 30 and 45 days after transplanting. Other cultural practices were adopted as per recommendation given in the package of practices. The data on plant height, number of leaves per plant, size of the biggest leaf, curd compactness (angle between center of the curd stalk and the point of attachment of last buttons in the stalk) were recorded treatment wise from 10 plants of the plot. Four harvesting were taken and marketable yield was recorded at each harvest per plot in kilograms and it was then converted into yield per hectare in tons. Data on curd diameter and individual marketable curd weight were recorded from 10 plants per plot. Besides, economical analysis was done on the basis of variable cost (land preparation, seedling, fertilization, labor, irrigation, mulch materials etc.), gross return, gross margin and BCR of the two years’ mean data. Economic evaluation of different irrigation and mulch combinations was obtained through dominance analysis followed by marginal analysis of the cost un dominated treatments. Marginal Rate of Return (MRR) was calculated.

Source of Information: Asian Journal of Plant Sciences, 6 (2): 338-343, 2007, ISSN 1682-3974

Article Link (Online Journal): DOI: 10.3923/ajps.2007.338.343, URL: http://scialert.net/abstract/?doi=ajps.2007.338.343

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the above discussion, it could be inferred that proper irrigation intervals (14 or 21 days) with forest leaves’ (mango leaves) mulch could be profitable for cauliflower production.Seven days interval irrigation and mulching with forest leaves (mango leaves) in combination gave the highest benefit cost ratio (6.51) closely followed by 14 days interval irrigation with the same mulch (6.48). But maximum marginal rate of return (1156.89%) was recorded from the combination of 14 days interval irrigation and mulching by mango leaves followed by irrigation at 21 days interval with the same type of mulch (936.92%).

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