PENGARUH PENAMBAHAN DOLOMIT PADA BLOK MEDIA BERBASIS SISA PAKAN TERNAK KAMBING DAN DOMBA (Capra aegagrus hircus & Ovis aries) TERHADAP PERKEMBANGAN AKAR BIBIT PAKCOY (Brassica rapa L. var. chinensis)

The increase in livestock population results in the accumulation of feed waste that has the potential to cause environmental pollution due to secondary fermentation. This study aims to examine the effect of dolomite addition on the growth of bok choy seedlings in media blocks based on livestock feed waste, and to determine the most optimal dosage of dolomite. The proposed innovative solution is to process feed waste into growing media blocks, with the addition of dolomite to neutralize the potential acidity of the media and provide essential nutrients. This study used an experimental method with a one-way Completely Randomized Design (CRD). The treatments consisted of four dolomite dosage levels: P0 (0% - control), P1 (5%), P2 (10%), and P3 (15%) of the total media block material, with five replications. The main observation parameter was the root length of bok choy seedlings (cm). The results of statistical analysis using Analysis of Variance (ANOVA) showed that there was a very significant difference in the average root length between treatments (F-count = 245.326, Sig. < 0.001). The results of the Least Significant Difference (LSD) follow-up test confirmed that all treatment pairs were significantly different. Treatment P2 (10% Dolomite Dose) was the optimal dose because it produced the highest average root length and was significantly different from all other doses (P0, P1, and P3). The addition of 10% dolomite was believed to successfully correct the pH of the remaining feed media to the ideal point (around 6.0–7.0), which maximized the availability and absorption of nutrients. The 15% dose (P3) caused a decrease in growth effects, indicating that the dose had passed the optimal point.