Effects of physical properties of soil on growth of Zelkova serrata MAKINO

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  • ケヤキの生育に及ぼす土壌物理性の影響
  • ケヤキ ノ セイイク ニ オヨボス ドジョウ ブツリセイ ノ エイキョウ

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Abstract

We investigated the effects of physical properties of soil on growth of Zelkova serrata MAKINO in Yashima Chuo Park constructed by banking of decomposed granite soil. The results were as follows. 1) Root growth of Z. serrata was hampered in compacted soil that showed high solid ratio. 2) Improvement of physical properties of soil by degging accelerated root growth, but the effect of mixing organic matter (peat moss) into soil were not appeared in a year. 3) Even soil was dug, surface soil was compacted to the condition before dug by human trampling. 4) Root of Z. serrata was found where solid ratio of soil was under 60% and soil hardness measured by Yamanaka's soil hardness tester was under 20mm (6.3 kg/c㎡).

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