Comparison of Cow Urine Bokashi, Green Bokashi and Chemical Fertilizer on Growth Of Pakcoy (Brassica Rapa L. Subsp. Chinensis) Utilizing Deep Flow Technique Hydrophonic

Abstract

Hydroponic is a known technique in agriculture, using water instead of soil as growing
media, where specific fertilizer were constinously added. Generally, chemical fertilizer were
used in hydrophonic system, i.e. AB mix fertilizer, a combination of several fertilizer, which
certainly costly. This research aim to find alternative fertilizer for hydrophonic where growth
of the plants/crops is maintained. Two possible fertilizer easily found nearby UNAI campus
were cow urine, and discarded parts of green vegetables. Fermentation of these urine and
green compost were the main role to produce appropriate fertilizer, known as bokashi.
Pakcoy (Brassica rapa L. var. Chinensis) seedling were used from its ready for planting time
(approx. 4 days) in rockwool. Hydroponics system utilizing Deep Flow Technique (DFT), A
shape model. Data of pakcoy growth including height of the plants, leaves width and root
length were measured every week up to 5 weeks. Data were analyzed using Analysis of
Variance (ANOVA) and continued with Duncan Multiple Range Test. The result showed
that, on plants height, each fertilizer was differing each other, where AB mix is higher with
average 22.71 cm, followed by green bokashi 18.74 cm, and cow urine bokashi 16.38 cm. On
leaves width, AB mix is greater with average 9.22 cm, followed by green bokashi 8.03 cm
and cow urine bokashi 7.00 cm. Analysis on root length, AB mix is higher with average
49.76 cm, followed with green bokashi 21.33 cm, and cow urine bokashi 21.21 cm. This
research concludes that green bokashi and cow urine bokashi could be use as alternative
fertilizer in hydroponics system, although AB mix gives higher growth.