Habitats of Anthoxanthum odoratum L. and Carex albata Boott in Sown Pasture

DOI JASI Web Site 29 References
  • Watanabe Nariyasu
    Department of Animal Production and Grassland, National Agricultural Research Center
  • Yatagai Aya
    Taiheiyo Consultant Co., ltd.
  • Nishiwaki Aya
    Faculty of Agriculture, Miyazaki University
  • Itano Shiro
    Department of Grassland Ecology, National Institute of Livestock and Grassland Science
  • Sugawara Kazuo
    Laboratory of Land Ecology, Graduate School of Agricultural Science, Tohoku University

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Other Title
  • 放牧利用人工草地におけるハルガヤ(Anthoxanthum odoratum L.)とミノボロスゲ(Carex albata Boott)の生育環境
  • ホウボク リヨウ ジンコウ ソウチ ニ オケル ハルガヤ Anthoxanthum odoratum L ト ミノボロスゲ Carex albata Boott ノ セイイク カンキョウ

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Abstract

The relationships between various environmental factors and the appearance of Anthoxanthum odoratum and Carex albata in sown pasture were analyzed by discriminant analysis. Then correlations of coverages with soil pH, soil nitrogen concentration (soil N), and soil available phosphate concentration (soil P) were examined. Discriminant coefficients of soil moisture and slope degree against A. odoratum were positive, but the coefficient of soil hardness was negative. Coverage increased with decreases in soil N and P. On the other hand, in the case of C. albata, the discriminant coefficient of depth of humus layer was positive and the coefficient of soil pH was negative. C. albata coverage significantly increased with the decrease in soil pH. The results indicated that A. odoratum tends to grow well in conditions of low fertility such as on a steep slope but that it is susceptible to drought stress. Thus, enhancement of the competitiveness by fertilization would be an effective means to protect sown grasses against A. odoratum. On the other hand, the results indicated that C. albata prefers conditions of abundant nutrition and has a high level of tolerance to acid stress. Thus, modification of soil acidity, not fertilization, would be an effective mean to protect sown grasses against C. albata.

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