Demonstration of discrepancy in N remaining rate of organic matter evaluated by N content and 15N content in the glass fiber-filter paper bag method

Mizuhiko Nishida, Kazunari Tsuchiya, Mihoko Moriizumi, Masao Usui, Mizuhiko Nishida, Mihoko Moriizumi

研究成果: Article査読

4 被引用数 (Scopus)

抄録

15N-labeled rice straw, wheat straw, and cattle manure sawdust compost were used to evaluate the N remaining rate of organic matter by the application of the glass fiber-filter paper bag method, and to demonstrate the discrepancy between the N remaining rate of organic matter evaluated by the N content and the N remaining rate of organic matter directly evaluated by the 15N content. In all three kinds of organic matters examined, a discrepancy in the N remaining rate of organic matter was observed between the evaluation by the N content and the evaluation by the 15N content. Loss of N from organic matter was observed using the 15N content, though the N remaining rates of wheat straw and rice straw evaluated by the N content were above 100% throughout the experimental period. The N inflow into and N outflow from the glass fiber-filter paper bag occurred simultaneously. The discrepancy between the N remaining rate of organic matter evaluated by the N content and the N remaining rate of organic matter evaluated by the 15N content became larger as the C / N ratio of organic matter increased.

本文言語English
ページ(範囲)297-300
ページ数4
ジャーナルSoil Science and Plant Nutrition
49
2
DOI
出版ステータスPublished - 2003 4 1
外部発表はい

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

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