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Influence of Sulphur Fertilizer on Yield and Micronutrient Uptake in Sunflower

Shamima Nasreen
Division of Soil Science Bangladesh Agricutural Research lnstitute Joydebpur, Gazipur-1701, Bangladesh

S. M. Imamul Huq
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

Field experiments were conducted during rabi seasons of 1995-96, 1996-97 and 1997-98 in the Grey Terrace soil (Aibaquept) of Gazipur to see the effect of different levels of S application on the yield and micronutrients (Cu and Zn) uptake in sunflower (cv. Kironi). The effect of S on seed yield was significant. The highest yield was recorded with the application of 80 kg S/ha which was statistically identical with 60 kg S/ha. Micronutrients (Cu and Zn) uptake by plant were also significantly influenced by the added S up to 60 kg/ha at all the growth stages. Plants grown without S had the lowest seed yield and the lowest nutrient uptake.

Keywords: Sunflower, S fertilizer, Micronutrient uptake

Location: Bangladesh Agricultural Research Institute farm, Gazipur, Bangladesh.

Start Date: 00-00-1995

End Date: 00-00-1998

Program Area: Crop-Soil-Water Management

Commodity: Sunflower, Fertilizer

Objectives:

To see the effect of S fertilizer on yield and uptake of Cu and Zn by sunflower.

Methodology:

Field trials were conducted for three consecutive years (1995-96, 1996-97 and 1997- 98) at the Bangladesh Agricultural Research Institute farm , Gazipur. The experimental soil was clay loam with pH 6.0, organic matter 1.06%, total N 0.035%, available P 0.02 ppm, exchangeable K 0.14 meq/100 g soil, available S 10.5 ppm and available Cu 0.7 ppm and Zn 0.2 ppm. The total rainfall during the crop season (November to March) was 88.4 mm in 1995-96, 61.0 mm in 1996-97 and 116.8 mm in 1997-98. Seven levels of S viz. 0,20,40,60, 80, 100 an<1120 kg S/ha were used as treatment variables. The experiment was laid out in a randomized complete block design and the treatments were replicated four times. The unit plot size was Sm x 3m. Every plot was fertilized with N₁₂₀P₉₀K₈₀Zn₅B₂ kg/ha as urea for N, TSP for P, MP for K, Zn0 for Zn and Soluber for B. Sulphur is applied in the form of gypsum. The whole amount of TSP, MP, gypsum, zinc oxide, soluber and half of urea were applied as basal dose. Seed of sunflower (cv. Kironi) were sown in the first week of November every year. The remaining urea was applied in two splits at 25 and 45 days after emergence (DAE). Three irrigations were made at 25, 45 and 75 DAE. Weeding and mulching were done as and when required. Five plants were random ly collected from each plot and separated into leaf, petiole, stem and head at vegetative (35-40 DAE), reproductive (75-80 DAE) and at maturity (110- 115 DAE) stages to determine nutrient uptake. The Cu and Zn contents were determined by atomic absorption spectrophotometer. The crop was harvested at 110-115 DAE when the head turned yellow brown in colour. The heads were cut from the plants and dried on the threshing floor for about 6-7 days. The seeds of plants from each plot were then recorded individually and adjusted to 8% moisture content. Data on yield and nutrient uptake were subjected to analysis of variance. Duncan's. New Multiple Range Test (DMRT) was used for mean separation.

Source of Information: Bangladesh J. Agrll. Sci. 30(2):- 219-224,July, 2003

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

This result indicated that S requirement by sunflower plant per unit area is quite high to sustain its better growth and high yield potential. The results indicate that the dry matter synthesis and accumulation of nutrients were interrelated. Reproductive to seed filling period was more important for dry matter and nutrient accumulation. Uptake of Cu and Zn by sunflower plant at different growth stages were the highest between 60-80 kg S/ha. Hence, there is a need of S application in soils low in available S to boost crop yields and increase n.utrient uptake by crop.

Knowledge Management: Journal