Drough tolerance estimation of several rainfed rice (Oryza sativa L.) of lokal veriety using polyethilene glycol (PEG)

Abstract

The yield of rice crop was highly affected by water availability and drought condition . The effort was done to seek local varieties of rainfed rice which tend to be tolerance to drought condition. This research objective was to seek some local varieties of rainfed rice that tolerance to several drought conditions. This research was conducted at Farm Exprimentation Site of Agrotechnology Study Program, Baturaja University from November 2015 to April 2016. Exprimental design used in this research was Split Plot Design with three replications. The main plot was variety treatments (varieties of Henik, Henik Pisang, Serenik, Remaja, Semester, Selanggar, Duku, Serendah Putih, Agai and Tinta), whereas the subplot was Polyethilene glycol (PEG) treatments (concentrations of 0%, 20%, 25% dan 30%). The results showed that varieties of Henik, Henik Pisang, Serenik, Semester, Duku, Serendah Putih and Tinta had produced high yield at drought condition. Rainfed rice could produced high yield at treatments of 20% and 25% PEG, respectively. Treatment combination of Duku variety and 30% PEG had produced the highest weight of unhulled rice/clump and fully unhulled rice/clump, respectively. The highest weight of unhulled rice per 1000 grains was found on treatment combination of Duku variety and 25% PEG.