STUDI ALELOPATI Wedelia trilobata, Ageratum conyzoides, Chromolaena odorata DAN Mikania micrantha TERHADAP PERTUMBUHAN DAN HASIL SAWI

Status: PostprintVarious results of researches report that daisy Creeping Daisy (Wedelia trilobata), Goat weed (Ageratum conyzoides), Siam weed (Chromolaena odorata) and Bittervine (Mikania micrantha) have alellopathic potency to innhibit germination, growth and plant yield.. There were few researches on allelopathic potential of Creeping Daisy, Goat weed, Siam weed and Bittervine on mustard. Therefore, an experiment to evaluate the the allelopathic effects of those weeds on growth and yield of mustard at different concentrations is necessary to be conducted. The purpose of the research was to determine the allelopathic effects of Creeping Daisy, Goat weed, Siam weed and Bittervine on the germination of mustard. The Experiment was conducted from November 2008 until January 2009 at Agronomy Laboratory, University of Bengkulu using Randomized Complete Design (RCD). The experiment consisted of four weed species namely Creeping Daisy, Goat weed, Siam weed and Bittervine and five allelopathic concentrations 10, 20,30, 40 and 50 g/L. The results showed that Siam weed suppressed mustard germination more than other weeds. Allelopathic of Siam weed suppressed shoot length and root length of mustard seedling as much as 42.63% and 45.15% respectively. Shoot and root fresh weight and shoot dry weight of mustard seedling were suppressed as much as 28,23%,56,16% and 56,7% respectively The concentration of 50 g/L extracts from Goat weed andSiam weed was the most toxic to the germination of mustard.

ALLELOPATHY STUDY OF Wedelia trilobata, Ageratum Conyzoides, Chromolaena odorata AND Mikania micrantha ON THE GROWTH AND YIELD OF MUSTARD

Status: PostprintVarious results of researches report that daisy Creeping Daisy (Wedelia trilobata), Goat weed (Ageratum conyzoides), Siam weed (Chromolaena odorata) and Bittervine (Mikania micrantha) have alellopathic potency to innhibit germination, growth and plant yield.. There were few researches on allelopathic potential of Creeping Daisy, Goat weed, Siam weed and Bittervine on mustard. Therefore, an experiment to evaluate the the allelopathic effects of those weeds on growth and yield of mustard at different concentrations is necessary to be conducted. The purpose of the research was to determine the allelopathic effects of Creeping Daisy, Goat weed, Siam weed and Bittervine on the germination of mustard. The Experiment was conducted from November 2008 until January 2009 at Agronomy Laboratory, University of Bengkulu using Randomized Complete Design (RCD). The experiment consisted of four weed species namely Creeping Daisy, Goat weed, Siam weed and Bittervine and five allelopathic concentrations 10, 20, 30, 40 and 50 g/L. The results showed that Siam weed suppressed mustard germination more than other weeds. Allelopathic of Siam weed suppressed shoot length and root length of mustard seedling as much as 42.63% and 45.15% respectively. Shoot and root fresh weight and shoot dry weight of mustard seedling were suppressed as much as 28,23%, 56,16% and 56,7% respectively The concentration of 50 g/L extracts from Goat weed and Siam weed was the most toxic to the germination of mustard.