Effect of some organic and mineral amendments sources on chemical and biological soil properties under different moisture contents
2006
El-Ghazouli, Muhammad A.
The main objective of this investigation is to comparative the effect of treating the soil with different types of biogas manure (BMC, BMW and BMI), compost manure (CMP) and mineral fertilizer (MFT) under two levels of soil moisture were studied. Each was added at a rate of 2% (20 g/kg soil) and the mineral fertilizer involved 85 mg N + 20 mg P + 40 mg K/kg soil using sandy, calcareous and clay soils. Incubation was performed to investigate the availability of some macro and micronutrients (P, Fe, Mn, Zn and Cu), NH4-N, NO3-N, organic matter, CO2 evolved from the soil and pH values after periods of 0, 15, 30, 60 and 120 days. Organic manures increased soil organic matter, DHA and CO2 evolved to values higher than the initial ones. There was a gradual and consistent decreased in pH as a result of adding organic manures. All organic substances as well as mineral fertilizers increase NH4-N, NO3-N and availability of P, Fe, Mn, Zn and Cu. The effect of organic sources was more pronounced than mineral fertilizer. Increasing the moisture content from 75 to 100% of field capacity increased the organic matter percentage, CO2 evolved from the soil, NH4-N, NO3-N and available of P, Fe, Mn, Zn and Cu. Available P, Fe, Mn, Zn and Cu in the clay soil greatly exceeded those of the other soils.
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