Nitrogen Dynamics of Organic Materials Applied to Paddy Fields: Direct Evaluation Using Organic Materials Labeled with Nitrogen-15

• NISHIDA Mizuhiko

  Lowland Crop Rotation Research Team, National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization

書誌事項

タイトル別名

• Direct Evaluation Using Organic Materials Labeled with Nitrogen-15

抄録

In this study, ¹⁵N-labeled organic materials were used to evaluate the nitrogen (N) dynamics associated with the application of organic materials to paddy fields. The decomposition of three types of organic materials, namely wheat straw, rice straw, and cattle manure compost, was evaluated by using the glass fiber-filter paper bag method. The N retention rates obtained by evaluation of N content were different from those obtained by evaluation of ¹⁵N abundance. The fates of N in seven types of ¹⁵N-labeled organic materials, namely cattle manure compost, poultry manure compost, swine feces, rice straw compost, rice bran, rice straw, and wheat straw, were studied during a crop season in a warm region in Japan. The nitrogen use efficiency for swine feces, poultry manure compost, and rice bran relative to that for chemical fertilizers was as high as approximately 70%, whereas the nitrogen use efficiency for cattle manure compost relative to that for chemical fertilizers was as low as 16-19%. The N uptake from ¹⁵N-labeled swine manure compost or rice bran simultaneously applied with cattle manure compost was slower than those from swine manure compost or rice bran alone. Furthermore, I investigated the fate of N derived from ¹⁵N-labeled cattle manure compost over a period of three years in a region with a cool climate. Well-composted cattle manure compost was found to be a stable N source for rice plants for at least three years after application. A large amount of N derived from the cattle manure compost remained in the soil even three years after application.

収録刊行物

• Japan Agricultural Research Quarterly: JARQ

  Japan Agricultural Research Quarterly: JARQ 45 (1), 31-38, 2011

  国立研究開発法人　国際農林水産業研究センター

キーワード

• compost
• manure
• nitrogen use efficiency
• plant residue
• rice

詳細情報

• CRID: 1390001204700622720
• NII論文ID: 130002147911
• DOI: 10.6090/jarq.45.31
• ISSN: 21858896
• ISSN: 00213551
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
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