| dc.description.abstract | There are various microbes living in tea waste, some of which might be capable of
solubilizing potassium (K). Potassium is a primary essential macro nutrient
sourced mainly from minerals in the soil. The purpose of the study was to
determine the type and population of potassium solubilizing bacteria and the
potential of potassium solubilizing bacteria from various levels of decomposition
of tea waste from Kebun Bah Butong Sidamanik in dissolving potassium. This
research was conducted at the Biologi Tanah laboratory of the faculty of
agriculture, University of North Sumatra. Isolation of potassium solubilizing
bacteria using Aleksandrov media. Testing the potential to dissolve K with
potassium sources K2HPO4 and feldspar (KAlSi3O8). The research consisted of
several stages, namely isolation of bacteria from tea waste compost, purification
of potassium solubilizing bacteria to obtain pure isolates, gram staining,
macroscopic and microscopic observations of potassium solubilizing bacteria, and
potential tests on several K sources on Aleksandrov media. The results showed
that there were 4 types of potassium solubilizing bacteria isolates derived from tea
waste. Isolates A, B, C, and D were able to dissolve potassium on Aleksandrov
media. The four types of isolates were tested on Aleksandrov media with several
K sources incubated for 7 days, with the largest potassium dissolution index
obtained at 3.93. Potassium-solubilizing bacterial isolates from tea waste were
better able to dissolve potassium feldspar than K2HPO4. | en_US |
