Pollution Research Paper

Vol.29, Issue 3, 2010; Page No.(417-420)

EFFICACY OF VERMICOMPOST ON THE HEAD YIELD STATUS OF THE SUNFLOWER PLANT (HELIANTHUS ANNUS L.)

P.K. RAMASAMY AND S. UMAVATHI

Abstract

In agricultural land soil fertility depletion is an important draw back due to continuous cultivation. In order to increase the soil fertility, inorganic fertilizers are being widely utilized in our cultivable lands. Even though they promote the growth of crops, their toxic effect is the negative impact by means of their over utilization. To overcome all these unwanted factors the application of organic manure especially vermicompost is recommended. Vermicompost is a rich source of macronutrients, micronutrients, vitamins, plant enzymes and plant growth hormones. So, the present study was done to examine the efficacy of vermicompost on the head yield status of the Sunflower plant (Helianthus annus L.). Different percentages of vermicompost (25, 50, 75 and 100%) derived from the earthworm, Eudrilus eugeniae was made with red soil. The Sunflower plant, Helianthus annus L. was cultivated in these vermicompost-red soil mixtures for the maximum period of 90 days. At the end of 90 days period of exposures the sunflower heads were collected; their numbers were counted; their diameter and circumference were measured; their weights were weighed. The maximum head numbers, diameter, circumference and weight were noticed in the plants grown in 50% vermicompost concentration.

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