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Effect of Foliar Application of Molybdenum on the Yield of Cauliflower (2015 – 2016)

S. Sultana
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

H. M. Naser
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

M. H. Rashid
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

S. Akhter
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

R. A. Begum
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

Abstract/ Executive Summary:

A field experiment was carried out to study the effect of foliar application of molybdenum on the yield of cauliflower (var. Snow White) at the net house of Soil Science Division of the Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur (AEZ-28). The experiment was designed in RCBD with 12 treatments. The micronutrient molybdenum (Mo) in the form of ammonium molybdate (NH4)₆Mo₇O₂₄^.2H₂O was applied as a foliar spray at three different stages of plant growth, i) 20 days after transplanting ii) 30days after transplanting and iii) 45 days after transplanting. The treatment combinations of foliar spray of Mo were –T₁: Control; T₂: 0.025 %, T₃: 0.05 %, and T₄: 0.1 % of Mo. The growth and yield of cauliflower were significantly affected by foliar spray of molybdenum. All parameters of cauliflower showed a higher tendency in T₃treatments. The highest curd weight (1.47kg) and curd yield (55.0ton ha-¹) was observed in the T₃ treatment (0.05% of foliar spray of molybdenum). The lowest curd weight (0.98 kg) and curd yield (41.0 ton ha^-1) were observed in T₁ treatment (no spray of molybdenum-control). Thus, foliar application of Mo on cauliflower is more effective for improving the yield of cauliflower in the study area of Joydebpur, Gazipur(AEZ-28).

Keywords: Cauliflower, Yield, Fertilizers, Foliar application, Molybdenum

Location: Soil Science Division of the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur

Start Date: 00-00-2015

End Date: 00-00-2016

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Cauliflower

Objectives:

The present study was, therefore, undertaken i) to know the response of cauliflower to foliar application of molybdenum for higher yield. ii) to find out the optimum dose of molybdenum for maximizing the yield of cauliflower.

Methodology:

A field experiment was carried out in the net house of Soil Science Division of the Bangladesh Agricultural Research Institute (BARI), Grey Terrace Soil, Joydebpur, Gazipur (AEZ 28) on 20 November 2015 to study the effect of foliar application of Mo on the yield of cauliflower. The experiment was designed in a randomized complete block design (RCBD) with 12 treatments. Equal-sized, healthy cauliflower (var. Snow White) seedlings of 25 days were transplanted with a spacing of 60 cm from line to line and 45 cm from plant to plant. Fertilizers were applied based on BARC fertilizer recommendation guide-2012. Urea, TSP, MP, Gypsum and Boric acid were used as a source of N, P, K, S and B, respectively. To study the effect of Mo as a foliar spray on growth, and yield of cauliflower Mo in the form of ammonium molybdate (NH4)₆Mo₇O₂₄^.2H₂O were applied as a foliar spray at the following three different stages of plant growth. i) 20 days after transplanting ii) 30days after transplanting iii) 45 days after transplanting. The treatment combinations of foliar spray of Mo were – T₁: Control; T₂: 0.025 % of Mo, T₃: 0.05 % of Mo T₄: 0.1 % of Mo. The volume of water 150 ml plant^-1 was estimated to wet completely the cauliflower plant. The spray solution was prepared on the basis of 50g of ammonium molybdate (NH4)₆Mo₇O₂₄^.2H₂O per hectare in 100 liters of water (R. G. Weir, 2004). The time of foliar spray was 8:00 A.M. Harvesting was done from 5^thFebruary to 9^th February 2016. Five plants from each plot were tagged randomly for the collection of different plant characters such as plant height (cm), circumference and number of leaves plant^-1. Initial soil samples collected from 0-15 cm depth prior to fertilizer application, were analyzed for all-important soil parameters using standard procedures. The soil was found to be acidic. Standard methods were used in these determinations. Soil pH was measured by a combined glass calomel electrode (Jackson, 1958). Organic carbon was determined by the wet oxidation method (Walkley and Black). Total N was determined by a modified Kjeldahl method. Calcium (Ca), magnesium (Mg) and K were determined by NH₄OAc extractable method, copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) were determined by DTPA extraction followed by AAS reading. Boron (B) was determined by CaCl₂ extraction method. Available P was determined by the Bray and Kurtz method while S was determined using the turbidimetric method with BaCl₂.

Source of Information: Annual Research Report 2015 – 2016, Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

Article Link (Online Journal):

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Total Budget (Tk.) :

Achievement/Findings:

The yield and curd of cauliflower plants receiving 0.05% foliar spray of Mo were enhanced than untreated plants. The study suggested that foliar application of Mo @ 0.05% may be recommended for improving the yield of cauliflower. Foliar applications of Mo are often more effective, particularly for acid soils.

Knowledge Management: Report/Proceedings