Penurunan Kandungan Merkuri pada Beberapa Varietas Padi (Oryza sativa) Menggunakan Tanaman Jerango (Acorus calamus) pada Lahan Tercemar Merkuri di Kabupaten Mandailing Natal

Abstract

Rice (Oryza sativa L.) is a rice-producing plant which is a staple food for Indonesian people. Phytoremediation is the use of plants to remove pollutants from contaminated soil or waters. This research was conducted on Kec. Huta Bargot, Kab. Mandailing Natal, North Sumatra from August to December 2023. This research used the Randomized Block Design (RAK) method which consisted of 3 replications with 2 treatment factors. The first factor is the population of treatment phytoremediation Jerango: (Without Phytoremedication, Jerango 5 Plants/Plot, Jerango 10 Plants /Plot and Jerango 15 Plants/Plot). The second factor is rice varieties: (Ciherang, IR-64 and IR-32). There were 12 combinations of treatments with three repetitions resulting in 36 experimental units. The parameters measured are: crop height (cm), number of seedlings, the age at which rice panicles emerge (HST), harvest age (HST), mercury content on the field early research, production (gr), amount of empty grain and contains (seed), mercure content of roots, stems, leaves and grain of crops, mercurys content on roots and leaves of phytoremediation crops. This research aims to find out the influence of the Jerango Plants (Acorus calamus) with different population numbers as a phytoremediator, differences in the reception of beetroot varieties and their interaction with the absorption of mercury on land contaminated by Mercury. The results of the research showed that the treatment of rice varieties had no real effect on the absorption of mercury. Treatment of Jerango populations with a density of ≥ 10 plants/plot was able to reduce the Hg content in stems, leaves and grains below the quality standard threshold. Interaction between varieties with a population density of gerango ≥ 10 plants/plot can reduce the Hg content in the grain below the quality standard threshold.