Respons Pertumbuhan dan Produksi Beberapa Genotipe Lokal Ubi Jalar (Ipomoea batatas L.) terhadap Pemberian Kompos Limbah Ikan di Lahan Salin

Abstract

This study aims to examine the growth and production responses of several local sweet potato genotypes when provided with fish waste compost. It was conducted in Durian Village, Pantai Labu District, Deli Serdang Regency, North Sumatra Province, from September 2024 to February 2025. A Randomized Block Design was employed, featuring two treatment factors and three replications. The first factor involved local sweet potato genotypes, which included two treatment levels: the local genotype of clove turi sweet potato with yellow tubers and the local genotype of Deli Serdang sweet potato with orange tubers. The second factor was the application of fish waste compost at four different concentrations: control, 10 tons/ha, 20 tons/ha, and 30 tons/ha. The observed parameters included tendril length, tuber length, tuber diameter, number of tubers, tuber weight per plant, tuber weight per plot, wet weight of the crown, and harvest index. The results indicated that the two local sweet potato genotypes differed significantly in the number of tubers produced and the harvest index. However, there were no significant differences between the genotypes in terms of tendril length (2-10 MST), tuber length, tuber diameter, tuber weight per plant, tuber weight per plot, or crown weight. The application of fish waste compost resulted in significant differences in the growth and production parameters, including tendril length (2-10 MST), tuber length, tuber diameter, number of tubers, tuber weight per plant, tuber weight per plot, wet weight of the crown, and harvest index. Based on the findings, both the clove turi sweet potato genotype with yellow tubers and the Deli Serdang sweet potato genotype with orange tubers can thrive on saline land when supplemented with 30 tons/ha of fish waste compost.