Effect of Width in Grass Buffer Strips on Trapping Characteristics of Soil and Nutrient Components using <I>Ophiopogon japonicus</I> Ker-Gawl.

DOI Web Site 2 Citations
  • Kawai Toshiyuki
    Department of Agricultural Engineering, Garaduate School of Agriculture, Tokyo University of Agriculture
  • Kawamura Sei
    Department of Agricultural Engineering, Garaduate School of Agriculture, Tokyo University of Agriculture
  • Mihara Machito
    Department of Bioproduction and Environment Science, Faculty of Regional Environment Science, Tokyo University of Agriculture

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Other Title
  • <I>Ophiopogon japonicus</I> Ker-Gawl.を用いた土壌および窒素・リン成分の捕捉特性に与える植生幅の影響
  • Ophiopogon japonicus Ker-Gawl.を用いた土壌及び窒素・リン成分の捕捉特性に与える植生幅の影響
  • Ophiopogon japonicus Ker Gawl オ モチイタ ドジョウ オヨビ チッソ リン セイブン ノ ホソク トクセイ ニ アタエル ショクセイハバ ノ エイキョウ

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Abstract

The objective of this study is to investigate the width in grass buffer strips on trapping characteristics of soil and nutrient components. The results indicated the trapping efficiency of soil and nutrient components tended to increase with the width of strips in the range from 10 to 50 cm. However, the differential coefficients decreased with the width of strips. Also, the differential coefficients became lower than 1 in the range from 20 to 30 cm. In addition, nitrogen and phosphorus concentration of sediments in the downstream tended to be higher than that in upstream. It was judged that excess width was not effective to trap nutrient components. So, we concluded the suitable width of strips in intensive agricultural area of Japan was in the range from20 to 30 cm.

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