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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)297-300
Number of pages4
JournalSoil Science and Plant Nutrition
Volume49
Issue number2
DOIs
Publication statusPublished - 2003 Apr 1
Externally publishedYes

Keywords

  • C / N ratio
  • Glass fiber-filter paper bag method
  • N of organic matter origin
  • N remaining rate
  • N-labeled organic matter

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

Fingerprint Dive into the research topics of 'Demonstration of discrepancy in N remaining rate of organic matter evaluated by N content and <sup>15</sup>N content in the glass fiber-filter paper bag method'. Together they form a unique fingerprint.

Cite this