Pengaruh interaksi pemberian biochardan kotoran sapi terhadap fase vegetatif tanaman padi (oryza sativa l.) Dan populasi bakteri pelarut fosfat

Gunawan Siswantoro, Abdul Basit

Abstract


Declining soil fertility resulting from the continuous use of inorganic fertilizers has become a major constraint to rice productivity in Indonesia. The combined application of biochar and cattle manure offers a sustainable strategy for improving soil physical, chemical, and biological properties, including the development of phosphate-solubilizing bacteria (PSB). This study aimed to evaluate the effects of combined biochar and cattle manure application on the vegetative growth of rice (Oryza sativa L.), the population of phosphate-solubilizing bacteria, and the relationship between PSB population and vegetative growth. The experiment was conducted from December 2025 to June 2026 using a Randomized Complete Block Design (RCBD) consisting of five treatments with four replications, resulting in 20 experimental units. Observed variables included plant height, leaf number, leaf area, tiller number, shoot fresh weight, shoot dry weight, root fresh weight, root dry weight, and PSB population determined using the Total Plate Count (TPC) method. Data were analyzed using analysis of variance (ANOVA), followed by the Least Significant Difference (LSD) test at the 5% significance level and correlation analysis. The results showed that the combined application of biochar and cattle manure had no significant effect on PSB population but significantly improved plant height, leaf number, leaf area, tiller number, shoot fresh weight, and shoot dry weight. The treatment consisting of 119 g biochar and 317 g cattle manure produced the best vegetative growth. Correlation analysis revealed positive relationships between PSB population, leaf area, and root dry weight. These findings indicate that the combined application of biochar and cattle manure effectively enhances rice vegetative growth but does not significantly increase the population of phosphate-solubilizing bacteria.

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References


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