Effects of the application of composted cattle manure on the fate of ^<15>N labeled ammonium nitrogen applied to vegetable fields

DOI JASI Web Site 22 References

Bibliographic Information

Other Title
  • 露地野菜畑における牛ふん堆肥併用時の硫安由来窒素の動態
  • ロジ ヤサイバタケ ニ オケル ギュウフン タイヒ ヘイヨウジ ノ リュウアン ユライ チッソ ノ ドウタイ

Search this article

Abstract

The fate of chemical fertilizer ammonium nitrogen (Nitrogen Derived from Fertilizer: NDF) that was applied together with composted cattle manure was investigated using vegetables cultivated lysimeter. The plots of 1) single application of chemical fertilizer and 2) combined application of chemical fertilizer and composted cattle manure were set for 2 different kinds of soil (Andosols and Gray Lowland soils). We designed the experiment so that the nitrogen supply to the crops was equal in each plot, taking into account the substitution rate and relative fertilizer efficiency of composted cattle manure. ^<15>N labeled chemical fertilizer N was applied during year one, whereafter unlabeled N was added during year two. Nitrogen leaching was greater in the single application plots than in the combined application plots, therefore it was concluded that the combined application was successful in reducing the nitrogen leaching from vegetable fields, in terms of a relatively short duration of one to two years. The amounts of NDF absorbed by the crops in year one were roughly proportional to the NDF application rate. The majority of NDF in the soil was retained in an upper soil layer (0-20cm) after one year of the experiment, and the most of them were in immobilized forms (e.g. organic form). Immobilization of NDF in the upper soil layer was enhanced by the combined application of composted manure. Highly negative correlation coefficients were observed between the percentage recoveries of NDF in leachate at the end of the experiment, and in immobilization in soil after one year of the experiment.

Journal

References(22)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top