Febiola, Regina Rosari (2025) POTENSI Bacillus sp. SEBAGAI PGPR TERHADAP TANAMAN Zinnia elegans (Jacq.) DAN SEBAGAI AGENSIA BIOREMEDIASI TIMBAL (Pb). Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Lead (Pb) contamination in agricultural land can reduce soil quality and inhibit plant growth. Biological remediation efforts can be carried out using soil bacteria such as Bacillus sp., which act as Plant Growth-Promoting Rhizobacteria (PGPR), as well as hyperaccumulator plants such as Zinnia elegans (Jacq.) that are capable of absorbing heavy metals through their roots. This study aimed to determine the potential of Bacillus sp. and Z. elegans in reducing Pb content in soil and their effects on plant growth. The study used a non-factorial Completely Randomized Design with six treatments and three replications, namely P0 (Pb-contaminated soil without plants and bacteria or control), P1 (Z. elegans only), P2 (Bacillus sp. only), P3 (combination of Z. elegans and Bacillus sp.), P4 (uncontaminated soil with Z. elegans and Bacillus sp.), and P5 (uncontaminated soil with Z. elegans only). The results showed that Bacillus sp. was able to grow up to a Pb concentration of 100 ppm with the highest colony count at 60 ppm, amounting to 1.99 × 10¹⁰ CFU/ml. The combination of Bacillus sp. and Z. elegans resulted in the highest reduction of soil Pb levels at 62.31 ppm and enhanced plant growth compared to single treatments.
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | S Agriculture > SB Plant culture > SB950-989 Pest Control and Treatment of Diseases, Plant Protection S Agriculture > S Agriculture (General) > S590-599.9 Soils. Soil science |
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| Divisions: | Faculty of Agriculture > Departement of Agritechnology | ||||||||||||
| Depositing User: | Regina Regina Regina | ||||||||||||
| Date Deposited: | 20 Nov 2025 04:28 | ||||||||||||
| Last Modified: | 20 Nov 2025 04:28 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/46875 |
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