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International Journal of Soil Science

Year: 2018 | Volume: 13 | Issue: 1 | Page No.: 42-49
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Authors

Risma Neswati

Risma Neswati

Nurul Azizah

Nurul Azizah

Christianto Lopulisa

Sofyan Abdullah

Keywords

Research Article

Effect of Humic Subtances Produced from Lignite and Straw Compost on Phosphor Availability in Oxisols

Risma Neswati Risma Neswati's LiveDNA, Nurul Azizah Nurul Azizah's LiveDNA, Christianto Lopulisa and Sofyan Abdullah
Background and Objectives: In Oxisols, soluble inorganic phosphorus is fixed by aluminium and iron. Humic substances is an extraction of organic matter contains functional compounds which could adsorp Al become organo-mineral. It could be more effective for time, cost and amount of organic matter by using humic substances. This study was conducted to improve phosphorus availability using humic substances from lignite and rice straw compost. Materials and Methods: The treatments consist of lignite 300 ppm (H1), lignite 600 ppm (H2), lignite 900 ppm (H3), straw compost 300 ppm (H4), straw compost 600 ppm (H5), straw compost 900 ppm (H6) with 3 replications using completely randomized design. The parameters measured in this study were some of the chemical properties of soil, mainly phosphorus availability and plants growth. Results: The findings suggested that the humic substances could altered soil chemical properties and the humic substances from rice straw compost 900 ppm is the most effective increased available phosphorus, soil pH, CEC of clay, C-organic and decreasing exchangeable aluminium. But, based on maize growth results such as plants height and dry matter weight, the plants still showed phosphorus deficiency symptoms. Conclusion: These results indicated that needed higher dose of humic substances above 900 ppm to fixed the chemical properties of Oxisols. Humic substances from rice straw compost more effective than lignite to improve available phosphorus in Oxisols.
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