Integrasi Kompos Kulit Kopi dan Biochar untuk Meningkatkan Kualitas Bibit Kopi Arabika

Abstrak

The application of organic amendments is an important strategy to improve seedling quality in 
coffee nurseries. This study aimed to evaluate the effects of coffee husk compost and biochar, applied
singly and in combination, on the growth of Arabica coffee seedlings. The experiment was conducted
in a nursery using polybags filled with 5 kg of growing media and arranged in a randomized complete
block design with seven treatments and four replications. The treatments consisted of a control, coffee
husk compost alone, biochar alone, and combinations of compost and biochar at different rates.
Growth parameters observed included plant height, stem diameter, and number of leaves. The results
indicated that all amended treatments significantly improved seedling growth compared to the
control. The best growth performance was consistently obtained from the combined application of
coffee husk compost at 300 g polybag⁻¹ and biochar at 200 g polybag⁻¹, which produced the highest
plant height, stem diameter, and leaf number. This treatment demonstrated a synergistic effect
between coffee husk compost as a nutrient source and biochar as a soil conditioner that improved the
growing media environment. These findings suggest that the combined use of coffee husk compost and
biochar at appropriate rates is an effective approach to enhance vegetative growth and overall quality
of Arabica coffee seedlings in nursery systems.