Penentuan Nilai Ld50 Padi Gogo Kultivar Gajah dengan Iradiasi Sinar Gamma

Abstract

Jemys Bastanta Tarigan " Determination of LD50 value of upland rice cultivar Gajah with Gamma Ray Irradiation". Supervised by Dr. Dolly Sojuangan Siregar S.P., M.P. Rice plants (Oryza sativa L.) are food crops that are the main staple food of the Indonesian people. Drought often occurs in dry land, therefore, upland rice has a weakness during the dry season or when there is no rain, upland rice plants often experience drought stress. One of them is in implementing New Superior Varieties Type. This study aims to determine the population performance of the M1 generation of upland rice plants (Oryza sativa L.) of local cultivars resulting from gamma ray irradiation. This study used a one single factor Randomized Block Design (RBD) with gamma radiation dose treatment, namely: G0 = No Radiation/control, G1 = 100 gray, G2 = 200 gray, G3 = 300 gray, G4 = 400 gray, G5 = 500 gray, G6 = 600 gray, G7 = 700 gray, G8 = 800 gray, G9 = 900 gray and G10 = 1000 gray. Data analysis using the Anova test. The result of the study showed that gamma irradiation on upland rice seed had a significant effect on the percentage or germination, percentage of death, plant height and root length. From the results of the study, the LD50 value Gajah cultivar upland rice plants is 225,68 gray.