VEGETASI GULMA PADA EKOSISTEM RAWA GAMBUT DI PERKEBUNAN SAGU (Metroxylon sagu Rottb.) KABUPATEN KEPULAUAN MERANTI, RIAU

Abstract

The presence of weeds potentially interfereswith the growth of crops, especially on sago plantations. The purpose of this research was to find out composition, Index of Similarity and Index of Diversity of weeds in a sago plantation PT. National Sago Prima,Kepulauan Meranti regency, Riau. The research was conducted in January 2016 - April 2016. A quadrat sampling technique was carried out in four different location conditions, sago plantation which were not burned, burned in 2014, burned in 2013and burned in 2012. Size and number of plots were determined by plotting species-area curve. Based on the research results, 25 weed species obtained were classified into 18 families of 4,444 individuals. The results showed that the Index of Similarity of those burned locations had high communities’ similarity, while between the burned locations and locations which were not burned suggested otherwise. Based on Index of Diversity results, the 2014 burned location had the highest diversity of 0,86 and the lowest value of Indexof Diversity was 0,06, found on not burned location