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International Journal of Soil Science
  Year: 2008 | Volume: 3 | Issue: 1 | Page No.: 11-19
DOI: 10.3923/ijss.2008.11.19
 
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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
Adel Ghoneim, H. Ueno, A. Ebid, N. Asagi and I. Abou El darag

Abstract:
The fates of nitrogen-15 (15N)-labeled biogas slurry (BS) and chemical fertilizer (CF) applied to soil with low fertility cropped with rice were investigated. The 15N dilution method was used to estimate N uptake and recovery; potted soil was labeled with 1.0 atom % excess [15N] ammonium chloride ([15N]NH4Cl). Certain select soil characteristics were also measured in soil amended with the slurry to explain N losses. The values of the % N derived by fertilizer application to the plant exhibited significant differences among different plant parts. N uptake from the CF applied to rice grain, straw and the roots was significantly (p<0.05) higher than that from BS, but the highest proportion of N uptake by rice was from the soil. At harvest, an average of 6.2 and 13.2% of applied N remained in the soil treated with the CF and BS, respectively. Fertilizer use efficiency calculated by the 15N dilution method tended to be higher for CF than BS. A significant amount of N fertilizer (average: 30%) was apparently lost from the soil-plant system by ammonia (NH3) volatilization. Following BS application, the pH increased by 1 to 1.2 units in the top 5 cm of the soil, resulting in high NH3 volatilization in the first 2 days of the experiment. The NH3 volatilization accounted for the decrease in soil ammonium-N (NH4+-N) content.
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 RELATED ARTICLES:
  •    Indirect 15N Isotope Techniques for Estimating N Dynamics and N Uptake by Rice from Poultry Manure and Sewage Sludge
  •    Effect of Different Forms and Levels of Nitrogen on Vegetative Growth and Leaf Nutrient Status of Nursery Seedling Rootstocks of Peach
How to cite this article:

Adel Ghoneim, H. Ueno, A. Ebid, N. Asagi and I. Abou El darag, 2008. 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. International Journal of Soil Science, 3: 11-19.

DOI: 10.3923/ijss.2008.11.19

URL: https://scialert.net/abstract/?doi=ijss.2008.11.19

 
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