One weeping woman dressed in black kissed the face of the soldier, who lay in an open casket, flanked by soldiers in dress uniform holding rifles. A Russian Orthodox priest waved incense over the coffin.
Dyadyushko, from the nearby settlement of Arkhonskaya, left behind four sisters and a mother, said local leader Alexander Kusey.
"He was from a large family, and he was the only one who provided for it. I don't know how the girls will do without him now, he helped a lot," he said.
"He was not married, he did not have a chance, he was young, very young. It's a shame when the young pass away before their time."
As the coffin was lowered into the ground, a military brass band played the national anthem and an honour guard fired a salute using automatic weapons.
Shortly afterwards, mourners gathered for another funeral, that of 41-year-old Ruslan Kozayev. One elderly woman, in tears, gently touched his face.
Elsewhere in the cemetery, more than 20 fresh graves for soldiers who died in Ukraine were visible.
