Analysis of yields quantity and quality of several sweet potatoes genotypes at different harvest ages

Abstract

Efforts to increase production and yield quality can be done by planting local superior genotypes and setting the right harvest ages. This research was conducted to analyse the effect of harvesting age and genotype on the quantity and quality of sweet potato production. The location of planting in the research area on Jalan Pasar 1 Medan Selayang, from May to September 2019. This research used a randomized block design with 2 factors, namely local genotype (Perbaungan, Cengkeh Turi with orange tuber, Cengkeh Turi with yellow tuber), Beta-1 and harvest age (14,16, and 18 weeks). The highest production quantity indicated by the tuber weight, the best harvest quality indicated by the fresh tuber grade A grading and the highest yield index were the local genotypes of Cengkeh Turi with yellow tubers. The highest grade B fresh tuber grading was produced by Perbaungan local genotypes. Beta -1 variety produced the highest plant fresh weight. Sweet potato harvested at the age of 18 weeks produced the highest tuber weight, the best grade A fresh tuber grading, and the highest yield index. Production weight and yield quality were not influenced by the interaction between the treatment of harvest age and sweet potato genotype.