Effects of Organic and Inorganic Materials on Soil Acidity and Phosphorus Availability in a Soil Incubation Study

Opala, P. A.; Okalebo, J. R.; Othieno, C. O.

doi:10.5402/2012/597216

Cited by 61 publications

(61 citation statements)

References 25 publications

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“…This indicates that Udults, which is inherently acid, is more responsive to addition of compost than other two soils. This result is in concurrent to that reported by Opala et al (2012) where addition of tithonia reduced 264.7% exchangeable Al as compared to control. Reduction of exchangeable Al as water hyacinth compost rate increases was followed by improvement of soil pH ( Figure 5).…”

Section: Effect Of Water Hyacinth Compost On Soil Qualitysupporting

confidence: 81%

Quality Enhancement of Humid Tropical Soils after Application of Water Hyacinth (Eichornia crassipes) Compost

Muktamar¹,

Justisia²,

Setyowati³

2017

Preprint

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Compost application to soil leads to the improvement of its properties. However, nutrient content and enhancing capacity of compost are highly dependent on the original source and additive. The purpose of the experiment was to investigate selected soil quality indicators’ improvement and sweet corn growth following application of water hyacinth compost. Greenhouse experiment was carried out using Completely Randomized Design with 2 factors. First factor consisted of soils from humid tropics, i.e. Andepts, Udepts, and Udults and second factor comprised of water hyacinth compost rates, i.e. 0, 5, 10, 15, 20, and 25 Mg ha-1. Treatment combinations were replicated 3 times. Compost was incorporated in soil a week before planting of sweet corn. After reaching maximum sweet corn growth, soil sample was collected, air-dried, grinded and passed through 0.5 mm screen, and analyzed for selected soil properties, except microbial biomass carbon (MBC) and particulate organic matter carbon (POMC) which were analyzed using fresh soil samples. The experiment pointed out that application of water hyacinth compost on Udepts exhibited the highest total soil organic carbon (TSOC), MBC, soil pH and available P (Bray I), followed by those in Andeps and Udults. Particulate organic matter carbon (PMOC), however, was highest in Andepts as compared to other soils. Higher rates of compost application contributed higher increase in TSOC, MBC, soil pH, available P, and exchangeable K. Udults had more pronounced increase in soil pH and decline of exchangeable Al than other soils. Pearson correlation analysis showed that the most distinct correlation among soil properties was observed between exchangeable Al and soil pH, followed by TSOC and MBC with coefficient correlation of -0.91 and 0.85, respectively. Correlation between soil properties and sweet corn growth exhibited that the most prominent correlation was shown between available P and shoot dry weigh of sweet corn with coefficient correlation of 0.92. This indicates that soil available P has significant contribution on sweet corn growth.

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Section: Effect Of Water Hyacinth Compost On Soil Qualitysupporting

confidence: 81%

Quality Enhancement of Humid Tropical Soils after Application of Water Hyacinth (Eichornia crassipes) Compost

Muktamar¹,

Justisia²,

Setyowati³

2017

Preprint

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“…The increase in available P with duration of incubation reported in this study is comparable to those reported by Laboski and Lamb (2003) and Spychaj-Fabisiak et al (2005). The observed increase in available P with an increase in the duration of incubation could be due to microbially mediated mineralization of soil organic P to form inorganic P (Opala et al, 2012).…”

Section: Resultsmentioning

confidence: 93%

Characterization of Biochar Produced at Different Temperatures and its Effect on Acidic Nitosol of Jimma, Southwest Ethiopia

Dume¹,

Berecha²,

Tulu³

2015

International J. of Soil Science

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Physical and chemical properties of the biochar varied as a function of feedstock selection and pyrolysis temperatures. Biochar additions to acidic soils have the potential to improve soil fertility and crop yield. Biochar materials were produced from coffee husk and corn cob at temperatures of 350 and 500°C and characterized by their physical and chemical properties. These were mixed with acidic soil at the rates of 0, 5, 10 and 15 t haG 1 and were laboratory incubated for 2 months at ambient temperature to examine changes in soil properties. Types of feedstock used at two different pyrolysis temperatures and application rate had no significant effects on soil textural classes but showed highly significant effects (p<0.01) on soil pH, Electrical Conductivity (EC), Cation Exchange Capacity (CEC), Organic Carbon (OC), Organic Matter (OM), Total Nitrogen (TN), exchangeable cations and available phosphorous. Application of coffee husk biochar showed relatively better improvement in soil chemical properties (pH, EC, CEC, OC, OM, TN, exchangeable cations and available phosphorous) than corn cob biochar at all application rates. The highest values of chemical properties were recorded when coffee husk biochar produced at 500°C temperature was applied at a rate of 15 t haG 1 . Therefore, we generated an evidence that application of biochar is very important to improve physical and chemical properties of acidic soil.

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“…The highest values of available phosphorous recorded when coffee husk biochar produced at 500°C temperature was applied at a rate of 15 t/ha after two months of incubation periods and at pH values of 6.6. The observed increase in available phosphorus due to application of biochar could be due to the presence of phosphorous in the coffee husk and corn cob and the increase in the availability of P with time was because of microbially mediated mineralization of soil organic P to form inorganic P (Opala et al, 2012). Significant differences were observed between soil available P and total levels of successive weeks of incubation of the biochar amended soil, that is, between available P levels of one week incubation and two weeks incubation, or between those of two weeks and three weeks of incubation period etc.…”

Section: Effect Of Biochar Application On Available Phosphorousmentioning

confidence: 99%

Improving available phosphorus in acidic soil using biochar

Dume¹,

Ayele²,

Regassa³

et al. 2017

J. Soil Sci. Environ. Manage.

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Understanding of phosphorus (P) retention and release mechanisms provides crucial information for the effective management of phosphorus to enhance crop production and sustain soil. In acidic soil, available phosphorus is fixed by aluminum and iron. To overcome this problem, soils are limed to fix aluminum and iron. But this practice is not economical for small scale farmers and also it is not environmentally friendly. This study was conducted to improve phosphorus availability using biochar produced from coffee husk and corn cob to fix aluminum and iron instead of phosphorus. Acidic soil samples were mixed with biochar applied at the rates of 0, 5, 10 and 15 t ha -1 and incubated in laboratory for 2 months at ambient temperature. The results showed significant effects (p<0.01) on selected soil chemical properties by increasing soil pH and reduced exchangeable acidity, exchangeable aluminum, and exchangeable iron in a way that enhanced the availability of phosphorus. Due to the incorporation of biochar the available P level increased to a level ranging 3.64±0.34 -23.21±0.07 mg/kg after an incubation period of 2 months and it increased by 84.3% available phosphorus when coffee husk biochar produced at 500°C temperature was applied at a rate of 15t/ha. Moreover, further field researches are needed to evaluate the effect of biochar on availability, the fate and uptake of available P in soil.

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Effects of Organic and Inorganic Materials on Soil Acidity and Phosphorus Availability in a Soil Incubation Study

Cited by 61 publications

References 25 publications

Quality Enhancement of Humid Tropical Soils after Application of Water Hyacinth (Eichornia crassipes) Compost

Quality Enhancement of Humid Tropical Soils after Application of Water Hyacinth (Eichornia crassipes) Compost

Characterization of Biochar Produced at Different Temperatures and its Effect on Acidic Nitosol of Jimma, Southwest Ethiopia

Improving available phosphorus in acidic soil using biochar

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