Characteristics of the relationship between natural 15N abundances in organic rice and soil

Mizuhiko Nishida, Yuta Sato

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The characteristics of the relationship of natural15N abundances (δ15N values) between rice and soil in organic farming and conventional farming were examined, and the possibility of discriminating organically grown rice from conventionally (non-organically) grown rice using this relationship was explored. Organically grown rice, conventionally grown rice and soil samples were collected from farmers’ fields in Daisen city and Yokote city, Akita prefecture, Japan as well as from the experimental fields of NARO Tohoku Agricultural Research Center located in Daisen from 2007 to 2009. Organic fertilizers and synthetic fertilizers available on the market in Akita prefecture were also collected. The δ15N values of those samples were measured. Regardless of the farming method, the δ15N values of rice reflected those of the soil. The δ15N values of the organic fertilizers available on the market were likely to be higher than those of the soil. Meanwhile the δ15N values of the synthetic fertilizers were negative and lower than those of the soil. The δ15N values of organically grown rice tended to be higher than the regression line obtained from the δ15N values of rice and soil without N source application. The δ15N values of conventionally grown rice tended to be lower than the regression line. These results indicated that the relationship of the δ15N values of rice and soil without an applied N source could aid in discriminating between organic rice and conventional rice.

本文言語English
ページ(範囲)180-186
ページ数7
ジャーナルPlant Production Science
18
2
DOI
出版ステータスPublished - 2015

ASJC Scopus subject areas

  • 農業および作物学

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