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Effect of Fertilizer on Plant Growth, Severity of Purple Blotch and Seed Yield of Onion

M. Mozaffar Hossain
Horticulture Research Centre, BARI, Joydebpur, Gazipur-1701, Bangladesh

M. Shah Alam
Department of Botany, Rajshahi University, Bangladesh

M. H. Rashid
Horticulture Research Centre, BARI, Joydebpur, Gazipur-1701, Bangladesh

M. Shahidul Alam
Department of Botany, Rajshahi University, Bangladesh

Dil Afroz
BARC, Farrngate, Dhaka-1215, Bangladesh

Abstract/ Executive Summary:

An experiment was undertaken to find out the effects of NPKS fertilizers on plant growth, severity of purple blotch caused by Alternaria porri and Stemphylium botryosum and seed yield of onion. Fertilizers showed significant effects on umbel stalk height, umbel diameter, percent disease index (PDI) and onion seed yield. The PDI was high in absence of each fertilizer. The lowest PDI value was recorded at 150-200-100-40 kg/ha of N- P-K-S, which was followed by 150-250-100-20, 150-200-125-20 and 150- 200-100-20 kg of N-P-K-S/ha. The maximum, seed yield of643.67 kg/ha was recorded at 150-200-100-40, which was followed by 150-200-100-20, 150-250-100-20 and 150-200-125-20 kg of N-P-K-S per hectare.

Keywords: Fertilizers, Plant, Growth, Purple Blotch, Seed, Yield, Onion

Location: Central Research Station, BARI, Joydebpur, Gazipur

Start Date: 01-08-1993

End Date: 31-12-1995

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To assess the effects of NPLS fertilizers on purple blotch and yield of onion seed.

Methodology:

The experiment was conducted at the Central Research Station of Bangladesh Agricultural Research Institute (BARl), Joydebpur, Gazipur during 1993-94 and 1994-95 winter season. The nutrient status and chemical properties of experimental field are shown in this study. The rates used for nitro glen were 0, 100, 150, 200 kg/ha, phosphorus 0, 100, 150, 200, 250 kg/ha, potassium 0, 75, 100, 125 kg/ha and sulphur 20 and 40 kg/ha. The fertilizer were used in different combinations maintaining 14 treatments. Sources of the fertilizers were urea for nitrogen, triple super phosphate for phosphorus (TSP), muriate of potash (MP) for potash and gypsum for sulphur (S). The entire quantity of TSP and S, one fourth of urea and one third of MP were applied as basal dose at final land preparation. Remaining urea was applied in 3 equal splits at 45, 65 and 85 days after planting. Rest of MP was applied at 45 and 65 days after planting. The experiment was laid out following randomized complete block design with three replications. Disease severity and seed yield were recorded.

Source of Information: Bangladesh Journal of Agriculture, Vol. 25 (1&2), pp. 35-42, Jan-Dec 2000, ISSN- 0253-5408, Bangladesh Agricultural Research Council.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The findings of the present study showed that 150-200-100-40, 150-200-125-20 and 150-250-100-20 kg of N-P-K-S per hectare are suitable doses of fertilizers for seed production of onion.

Knowledge Management: Journal