Respons pertumbuhan tanaman kelapa belum menghasilkan terhadap pemberian air kelapa dan asam humat

Abstract

Kopyor coconut demand usually increase because its endosperm has unique character, but kopyor coconut productivity is still low. The growth of young kopyor coconut can be improved by natural Plant Growth Regulation (PGR) such as coconut water and humic acid as an organic material for improving soil properties. The research was purposed to find out the effect of the combination of coconut water and humic acid applications on young kopyor coconuts plant growth. The research was conducted at Mekarsari Fruit Garden, Cileungsi, Bogor, West Java, from May 2018 to October 2018. The soil ordo was Ultisols. The experimental method used randomized block design (RDB) with 11 treatments and 3 replications. The treatments consisted of various combination of coconut water concentrations: 50%, 75%, 100%; humic acid dose: 10 mL/L, 20 mL/L, 30 mL/L per plant; and 100% coconut water and 30 mL/L humic acid as controls. The results showed that combination of the treatment 75% coconut water + 20 mL humic acid has the best response to addition of plant height on 16, 20, and 24 week after treatment (WAT) while the treatment 100% coconut water + 20 mL humic acid has the best response to addition of plant trunks on 8 until 24 WAT.