A study on the growth of Gorontalo local upland rice Ponda merah accession against drouhgt and shade stresses

Abstract

The aim of this study was to determine the vegetative growth response of Gorontalo local upland rice Ponda Merah accession against drought and shade stresses. The study was conducted in Sipatana Village, West Bulotadaa Subdistrict, Gorontalo City, from May to October 2017, examined using randomized block design with 4 replications. The first factor observed was the drought treatment which consisted of two levels; irrigation until the inundation height of 1.5 cm and irrigation carried out if the potential of groundwater reaches - 30 to -35.9 kPa. The second factor was shades which consisted of 3 levels; 0% shade, 25% shade, and 50% shade. The results showed that Gorontalo local upland rice Ponda merah accession was able to adapt well to drought stress, shade stress, and combination of both which were characterized by high values of plant dry weight 49,88 g under drought stress condition, 84,08 g under 50% shade condition and 44,61 g in drought + 50% shade condition and chlorophyll content 0.148 mg.g−1 under drought stress condition, 0,168 mg.g−1 under 50% shade condition and 0,202 mg.g−1 in drought +50% shade condition.