Pengaruh Jamur Trichoderma dan Pupuk Kandang Sapi terhadap Pertumbuhan Bibit Kelapa Sawit di Pre Nursery

The aim of this research are to know significance interaction between Trichoderma and cow manure for oil palm pre-nursery seedlings growth, to know the best dosage of Trichoderma for oil palm pre-nursery seedlings growth, and to know the best dosage of cow manure for oil palm pre-nursery seedlings growth. This research was conducted at education and research site (KP2) Institut Pertanian Stiper Yogyakarta, Maguwoharjo, Depok, Sleman, Yogyakarta Special Region. Research location altitude is 118 m asl. This research was carried out in April – June 2021. This research used Completed Random Design that consist of 2 factors. First factor was Trichoderma dosages namely 0 (control), 20, 40, and 60 g/polybag. Second factor was cow manure dosages namely 0 (control), 200, 600, and 1,000 g/polybag. The results showed that there is no significance interaction between Trichoderma and cow manure for all of parameters of oil palm pre-nursery seedlings growth. Trichoderma dosage 20 g/polybag is the best for stem diameter, fresh weight canopy, and dry weight roots parameters. Cow manure dosage 200 g/polybag is the best for seedlings height, leaf number, fresh weight canopy, dry weight canopy, fresh weight roots, and leaf area parameters.