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Accession number;03A0495283
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| Title;Measurement of Nitrate Nitrogen Reduction Potential of Soil in Upland Field |
| Author;
YAMAOKA MASARU
(National Inst. Rural Engineering, JPN)
SHINOGI YOSHIYUKI
(National Inst. Rural Engineering, JPN)
ABENNEY-MICKSON S
(National Inst. Rural Engineering, JPN)
SAITO TAKANORI
(National Inst. Rural Engineering, JPN)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.225;PAGE.329-339(2003)
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| Figure&Table&Reference;FIG.11, TBL.5, REF.21 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In order to decrease nitrate nitrogen (NO3-N) loads in upland fields to prevent migration to the subsoil (or groundwater), we measured NO3-N reduction potential of soil in an upland field. The soil texture is loam and was taken from the Kanto Plains. Samples of soil were submerged and methanol was added to the soil as carbon substrate for biological denitrification. As a result oxygen consumption rates and NO3-N reduction rates of the samples were relatively low until I day after the start of the measurement after which both rates increased considerably. NO3-N reduction rates of the surface soil and the soil at the 30cm depth from the surface increased up to 0.8mgN 100g-1dry-soil d-1. However, NO3-N reduction rate of the soil at the 60cm depth from the surface was less than half that of the preceding top soil. The surface soil or the soil in the upper layer, rather than the soil in the lower layer, in upland fields is suitable for NO3-N reduction. (author abst.) |
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