| dc.description.abstract | This research aims to compare fresh biochar and NPK-enriched biochar and their
decomposition levels and nutrient absorption efficiency in acid soil with soybean. Factorial
randomized block design was used in this experiment and consisted of two factors. The
first factor, biochar source, comprised four levels: B0: biochar without NPK, B1: rice straw
biochar + NPK, B2: soybean straw biochar + NPK, and B3: wood biochar + NPK. The second
factor, biochar enrichment, comprised four levels: D1: 0.5 tons ha-1
, D2: 2.5 tons ha-1
, D3:
5.0 tons ha-1
, and D4: 10 tons ha-1
. Each treatment was replicated three times, yielding 48
experiment units. The results showed that biochar enrichment with NPK affected the
decomposition level. The percentage of increasing decomposition in enriched wood
biochar (0.09%) was lower than rice (0.28%) and soybean (0.53%) straw biochar. An
increase in NPK absorbance efficiency and soybean dry weight was evident in NPK-enriched
biochar. The highest N absorbance efficiency occurred in wood biochar (21%), followed by
soybean and rice straw biochar, respectively, while the highest P and K absorbances were
found in rice straw biochar (35% and 26%, respectively), followed by wood and then
soybean biochar | en_US |
