{"created":"2024-06-03T02:00:37.771742+00:00","id":6659,"links":{},"metadata":{"_buckets":{"deposit":"efd1a1da-97b0-47c5-b84d-8ca29017d84c"},"_deposit":{"created_by":10,"id":"6659","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"6659"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00006659","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002-12-10","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"206","bibliographicPageStart":"195","bibliographicVolumeNumber":"58","bibliographic_titles":[{"bibliographic_title":"農業気象","bibliographic_titleLang":"ja"},{"bibliographic_title":"Journal of Agricultural Meteorology","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"レザーファーンは、オシダ科のシダ植物であり、その切り葉は、花束やフラワーアレンジメントの添え葉として近年需要が伸び、伊豆諸島八丈島の特産園芸作物となっている。しかし、1990年代の中頃から、商品価値を低下させるまだら黄化症が発生した。筆者らは、まだら黄化症が発生し始めた1990年代中頃が、レザーファーン栽培ハウスの管理形態の大きく変化した時期と一致することに着目し、ハウス管理およびハウス内微気象環境と、まだら黄化症の発生原因に関する現地実態調査を行った。その結果、まだら黄化症が発生するハウスは発生しないハウスに比べ、遮光が少ない、換気が悪い、灌水量が少ない等の特徴があり、ハウス内が強日射、高温、低土壌水分となっていることを報告した。このことから、レザーファーンのまだら黄化症発生防止対策として、遮光率を高め、十分な換気を行うとともに、灌水量を増やすことが導き出された。しかし、生産農家に対して具体的な栽培管理指針を示すには至らず、指針の策定が望まれた。そこで本研究では、遮光率および土壌水分を変えた実験を2作期にわたり行い、レザーファーンまだら黄化症の発生防止に関する検討を行った。その結果、栽培管理に関する有用な知見を得たので報告する。","subitem_description_language":"ja","subitem_description_type":"Other"},{"subitem_description":"Leaves of leather fern are used as a foliage plant and Mottled Yellowing Syndrome (MYS) has been occurring on leaves cultivated in protected greenhouses at Hachijo Island since the 1990s. Experiments with different shading levels and soil moisture levels were carried out to develop cultivation methods that will prevent the occurrence of MYS. Relationships between the greenhouse environment and the occurrence of MYS were examined and the following results were obtained.<br>The temperature of air, the canopy surface, and soil in the greenhouses were affected not only by shading levels but also by the color of the shading net. Air and canopy surface temperature decreased with an increase of shading rate with blue nets, however, temperatures under black nets were quite high due to the high surface temperature of the nets, which caused a high occurrence of MYS.<br>Numbers of leaves decreased with an increase of shading level, but the leaf size increased. Chlorophyll content of the leaves increased with shading levels too.<br>An optimum greenhouse environment to increase leaf size, leaf number, and chlorophyll content was obtained by a using a blue net with a 55% shading rate and the soil water potential controlled to less than 0.016MPa.<br>MYS occurrence is increased by high temperature stress of the plant rather than high solar radiation in greenhouses. Also, MYS occurrence was decreased by frequent irrigation.<br>MYS occurrence (%) can be estimated by degree days over 34&deg;C of maximum air temperature for well-irrigated greenhouses, and by 1.5 times the degree days over 32&deg;C for less-irrigated greenhouses. Farmers can manage the greenhouse environment to reduce MYS damage by applying these results.<br>Greenhouses devoted to leather fern cultivation should be shaded (around half the amount of sunlight compared to outside) and should be controlled to keep good ventilation and soil moisture by frequent irrigation, which provides a desirable canopy surface-, air- and soil temperature, resulting in reduction of MYS damage and improvement in productivity and quality.","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"養賢堂","subitem_publisher_language":"ja"},{"subitem_publisher":"The Society of Agricultural Meteorology of Japan","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.2480/agrmet.58.195"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0021-8588","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"横山 仁","creatorNameLang":"ja"},{"creatorName":"YOKOYAMA Hitoshi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"木曽 雅昭","creatorNameLang":"ja"},{"creatorName":"KISO Masaaki","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"原薗 芳信","creatorNameLang":"ja"},{"creatorName":"HARAZONO Yoshinobu","creatorNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_title":"レザーファーンのまだら黄化症発生に及ぼす遮光率と土壌水分の影響およびその防止指針","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"レザーファーンのまだら黄化症発生に及ぼす遮光率と土壌水分の影響およびその防止指針","subitem_title_language":"ja"},{"subitem_title":"Effects of the Shading Ratio of Greenhouse and Soil Moisture on the Occurrence of Mottled Yellowing Syndrome on Leather Fern, and Instructions for Cultivation","subitem_title_language":"en"}]},"item_type_id":"40001","owner":"10","path":["1670839190650"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-06-03"},"publish_date":"2024-06-03","publish_status":"0","recid":"6659","relation_version_is_last":true,"title":["レザーファーンのまだら黄化症発生に及ぼす遮光率と土壌水分の影響およびその防止指針"],"weko_creator_id":"10","weko_shared_id":-1},"updated":"2024-06-03T02:00:40.836117+00:00"}