播種時期と埋土深がハマヒルガオとハマエンドウの出芽と生残に及ぼす影響  [in Japanese] Effects of sowing dates and burial depth on seedling emergence and survival of Calystegia soldanella Roem. et Schult. and Lathyrus japonicus Willd  [in Japanese]

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Abstract

ハマヒルガオとハマエンドウの出芽とその後の生残に関する知見を基に, これらを海浜に導入する際の指針を得ることを目的とした。北海道石狩浜で採取した両種子に硫酸処理を施して硬実休眠を解除し, 秋と夏に様々な埋土深で砂浜に播種して出芽と生残を調査した。ハマヒルガオの秋播きでは, 埋土深5 cmで最高の89%が出芽し, 埋土深が深くなるに従って, または埋土深1 cmで出芽率は低下した。夏播きでも埋土深5 cmで最高の出芽率を示したが, いずれの埋土深でも秋播きよりは低かった。ハマエンドウの秋播きでは, 埋土深1∼15 cmで60∼76%と比較的高い出芽率を示したが, 埋土深1 cmで最低の出芽率となった。夏播きでの出芽率は最高でも11%であった。両種ともに埋土深1 cmまたは夏播きで出芽率が低下したのは, 極めて高温 · 乾燥となる地表付近の乾砂層が原因であると考察した。両種で5 cm以下の埋土深の影響が異なったのは, 実生の土壌貫通力の違いであると考えた。両種共に秋播きでは春になって地下から再生したが, 全播種数から求めた再生率は前年の出芽率よりも低下した。無処理種子は両種とも播種時期, 埋土深に関係なく6%以下の出芽率となった。

We aimed to accumulate the useful information of <i>Calystegia soldanella</i> and <i>Lathyrus japonicus</i> for the conservation of them and as the landscape material in coastal sand dune. The germination ecology of them was investigated. Seeds of both species, which collected in the Hokkaido Ishikari beach, were treated with sulfuric acid to release the hard seed dormancy. Seeds were sown in sand dune with various burial depths in the autumn and next summer. In the sowing in autumn, seedling of <i>C. soldanella</i> emerged at the highest 89% from the burial depth 5 cm, and the emergence rate was decreased with the burial depth and even at 1 cm of depth. In the sowing in summer, highest emergence rate was shown from the burial depth 5 cm as well as the sowing in autumn, though emergence rates decreased less than sowing in autumn at the each burial depth. In the sowing in autumn, <i>L. japonicus</i> showed good emergence rate of 60-76% from 1 cm to 15 cm of burial depth, and it was the lowest at burial depth 1 cm. The highest emergence rate in the sowing in summer was 11%. The dry sand layer, which became extreme high temperature and dry, was considered as the cause of decreasing in emergence rates of both species in summer or at the burial depth of 1 cm. The influence of the burial depth of 5 cm or more on the emergence was different in both species. It seemed that this reason was a difference of the soil penetration power of both seedling.

Journal

  • Journal of the Japanese Society of Revegetation Technology

    Journal of the Japanese Society of Revegetation Technology 28(2), 330-341, 2002-11-30

    The Japanese Society of Revegetation Technology

References:  9

Cited by:  5

Codes

  • NII Article ID (NAID)
    110002912129
  • NII NACSIS-CAT ID (NCID)
    AN10130633
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09167439
  • NDL Article ID
    6373540
  • NDL Source Classification
    ZR21(科学技術--農林水産--林産) // ZN1(科学技術--建設工学・建設業)
  • NDL Call No.
    Z18-1223
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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