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Asian Journal of Earth Sciences
  Year: 2012 | Volume: 5 | Issue: 2 | Page No.: 63-69
DOI: 10.3923/ajes.2012.63.69
Indirect 15N Isotope Techniques for Estimating N Dynamics and N Uptake by Rice from Poultry Manure and Sewage Sludge
Adel Mohamed Ghoneim, Hideto Ueno, Naomi Asagi and Takeshi Watanabe

Abstract:
Sole use of chemical fertilizers as a nutrient source for intensive paddy rice production has likely caused a decline in soil fertility and rice yields. This study examined the effects of poultry manure and sewage sludge application on nitrogen (N) uptake, dynamics and efficiency of usage. A 15N isotope dilution method was used to estimate the amount of N in rice plants derived from the poultry manure and sewage sludge. The results showed that the percentage of 15N recovered from sewage sludge and poultry manure was 19 and 36%, respectively. Most of the N uptake by rice was from the soil and varied from 54-64%. The relative efficiency of poultry manure and sewage sludge was 80 and 85%, respectively. No significant difference was observed in the N loss rate and the N residual into soil post harvesting between the poultry manure and sewage sludge.
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 RELATED ARTICLES:
  •    Nutrients Dynamics in Komatsuna (Brassica campestris L.) Growing Soil Fertilized with Biogas Slurry and Chemical Fertilizer Using15N Isotope Dilution Method
  •    Analysis of Nitrogen Dynamics and Fertilizer Use Efficiency in Rice Using the Nitrogen-15 Isotope Dilution Method Following the Application of Biogas Slurry or Chemical Fertilizer
How to cite this article:

Adel Mohamed Ghoneim, Hideto Ueno, Naomi Asagi and Takeshi Watanabe, 2012. Indirect 15N Isotope Techniques for Estimating N Dynamics and N Uptake by Rice from Poultry Manure and Sewage Sludge. Asian Journal of Earth Sciences, 5: 63-69.

DOI: 10.3923/ajes.2012.63.69

URL: https://scialert.net/abstract/?doi=ajes.2012.63.69

 
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