Pengaruh Konsentrasi dan Lama Perendaman NaOCl terhadap Daya Kecambah Benih Mucuna (Mucuna bracteata)

Abstract

Generative propagation of Mucuna bracteata is very difficult due to the hard seed coat so that for germination it is necessary to break the dormancy of the seeds. Then a dormancy breaking technique is needed using a chemical substance, namely NaOCl. The use of NaOCl must pay attention to the duration of immersion so as not to damage the embryo. This research was conducted from February to May 2023 at the Seed Technology Laboratory, Faculty of Agriculture, University of North Sumatra, Medan using a completely randomized design with two treatment factors. The first factor was the concentration of NaOCl with 5 levels, namely 0%, 2.5%, 5%, 7.5% and 10%. The second factor is the immersion time with 3 levels, namely 2 hours, 4 hours and 6 hours. Parameters observed were seed water uptake, germination percentage, germination rate, vigor index, seedling height, root length, fresh weight and dry weight. The results showed that the concentration of NaOCl significantly affected all parameters. The soaking time of NaOCl significantly affected the parameters of seed water absorption, germination percentage, germination rate, vigor index, seedling height, fresh weight and dry weight. The interaction of the two treatments significantly affected the parameters of seed water absorption, germination percentage, germination rate, vigor index, root length, fresh weight and dry weight. The best combination is 7.5% NaOCl concentration with time immersion 4 hours.