PENGARUH PUPUK ORGANIK CAIR URIN KELINCI DAN PENGURANGAN DOSIS PUPUK NPK MAJEMUK TERHADAP PERTUMBUHAN DAN HASIL KUBIS BUNGA

Effect of organic fertilizer rabbit urine and reduction of inorganic fertilizer dosage on the growth and yield of cauliflower

Abstrak

This research aimed to determine the effect of rabbit manure liquid organic fertilizer and reduced NPK fertilizer doses on cauliflower growth and yield. The research was conducted in Banyumas Regency, Central Java, from September 2022–January 2023. A Randomized Complete Block Design was employed with 2 factors. The first factor is rabbit manure liquid organic fertilizer with four levels; 0, 20, 40, 60 ml.L^-1, and the second factor is reducing the dose of NPK fertilizer with three levels; 0, 25, 50%. Data were analyzed using Analysis of Variance and Duncan’s Multiple Range Test at α = 5%. The results showed that 20 ml.L^{- 1} rabbit urine fertilizer increased the number of leaves and leaf area of cauliflower at 2 Weeks After Planting (WAP). Reducing the NPK dose by 25% increased the number of leaves of cauliflower at 6 WAP. There was an interaction between of rabbit urine fertilizer and reduced doses of NPK fertilizer; 20 ml.L^-1rabbit urine fertilizer + 50% NPK dose reduction increased the number of leaves, leaf area at 4 and 6 WAP, and shoot fresh weight of cauliflower at 9 WAP, 40 ml.L^-1rabbit urine fertilizer + 25% NPK dose reduction increased root volume and root dry weight of cauliflower at 9 WAP, 60 ml.L^-1rabbit urine fertilizer + 25% NPK dose reduction increased economical flower weight at 9 WAP. This research showed that increasing the economical flower weight of cauliflowers by 13.8% can be done by applying 60 ml/L rabbit urine fertilizer and 25% dose of NPK fertilizer.