Yogyakarta – BRIN Public Relations. The Site and Environment Monitoring Location (LPTL)- Loka Jepara, which is located in Ujung Watu Village, Jepara Regency, is a place that functions as a support for the activities of the Indonesian Nuclear Technology Polytechnic (Nuclear Polytechnic).

“We still use the Loka Jepara as the site for testing nuclear science and technology applications in the field of plant breeding, a nuclear-based environmental laboratory, and a nuclear-based rice seed breeding,” said Director of the Nuclear Polytechnic, Zainal Arief, while inspecting the LPTL – Loka Jepara, Tuesday (15/3).

In supporting the activities of the Nuclear Polytechnic, this location is used as an environmental laboratory, as well as the Center for Research and Community Service (PPPM). This is to realize the activities of the Tridharma (Three Pillar) of Higher Education.

Furthermore, Zainal hoped that the Nuclear Polytechnic can take advantage of the Loka Jepara to maximum for the activities of students in three study programs, both academically and non-academically.

“We can do many activities here, both as a means of education, training, research, and dissemination of nuclear science and technology,” he said.

Head of the Nuclear Polytechnics PPPM, Ismail, added that so far, the yields from bred rice harvest at Loka Jepara are partly used as seeds in the implementation of collaborative community service activities. Some other part is for seed stock for the subsequent planting period.

“For example, the previous year’s harvest was partly used in farming community empowerment activities in Pakis Village, Kendal, which had a grand harvest in October 2021,” he added.

As a nuclear-based environmental laboratory, said Ismail, the Nuclear Polytechnic has conducted a planting trial of rice as a result of BRIN’s research. Some of them are Mugibat, Mustajab, Bestari, Mira-1 and Sidenuk varieties.

Dwijo Murdyanto, BRIN employee at Loka Jepara, said that these rice varieties are planted in a total area of ​​1.12 hectares. Dwijo detailed each area, namely 0.25 hectares of Mugibat rice, 0.25 hectares of Mustajab, 0.25 hectares of Bestari, 0.25 hectares of Mira-1, and 0.12 hectares of Sidenuk varieties. All were planted in December 2021.

“Hopefully, the harvest this time can reach a yield of 5 to 6 tons,” he said optimistically.

Meanwhile, another BRIN employee at Loka Jepara, Sarmin Priyo Wardoyo, said that there is a local wisdom in Jepara called Embun Upas, in which people are reluctant to plant rice in May and December.

“We tried to plant rice from BRIN’s research in that month, and it turned out to be good, many residents inquire and wanted to try to plant these varieties,” he said.

Sarmin further explained each rice variety planted. Mugibat, he said, stands for Mutation Superior Irradiation BATAN.

“This variety is the result of a mutation from the Cimelati variety which was released by BP Padi of the Ministry of Agriculture in 2003,” added Sarmin.

According to him, Mugibat has fluffier taste, is resistant to leafhoppers, neck rot and leaf blight.

While the Mustajab variety, continued Sarmin, is the result of plant breeding from local varieties of rice, namely the Jembar variety using radiation mutation techniques.

The radiation mutation technique, explained Sarmin, is carried out by irradiating 0.2 kilo Grey of gamma cobalt 60 to improve the properties of rice into the desired variety. The advantages of Mustajab rice are sturdy stems, upright flag leaves, compact plants, rice quality and resistance to several pests and diseases.

Meanwhile, the Bestari rice variety, according to Sarmin, is stubborn because it is resistant to leafhoppers and leaf blight pests. “Meanwhile, the parent is very sensitive with a planting period of 115 to 120 days,” he affirms.

Then the Inpari Sidenuk rice variety was developed from the Diah Suci variant, which was irradiated by gamma rays at a dose of 0.2 kGy from cobalt 60, which was released in 2011.

“Its short lifespan of only 103 days, high productivity, and pest and disease resistance are the advantages of this rice,” said Sarmin.

According to him, when cooked the rice is fluffier, tastes good, making this variant very popular among the public.

Unlike Mira 1 rice which was released in 2006. This rice was developed from the Cisantana variant which was also gamma irradiated from Co-60 at a dose of 0.2 kGy. The planting age is not much different from Inpari Sidenuk rice, which is 110 days.

“This rice has better resistance to pests, so the price of seeds in the market is slightly higher than Inpari Sidenuk,” explained Sarmin. (tek, mn/ ed: tnt)