{"title":"Effects of High Humidity and Submerged Conditions on Hatchability of Pseudaulacaspis pentagona (Targioni-Tozetti) and a Control Method of High Humidity Conditions against Eggs Using a Sprinkler Spray in Tea Fields","authors":"K. Satoh","doi":"10.5979/CHA.2007.104_33","DOIUrl":"https://doi.org/10.5979/CHA.2007.104_33","url":null,"abstract":"(1)室内試験において,高湿度条件(相対湿度100%)および湛水条件下におけるクワシロ卵のふ化状況を調査した。高湿度および湛水条件下で7日間保持したクワシロ卵のふ化率は,それぞれ20%と7%に低下し,湛水条件を10日間維持すると卵はふ化しなかった。(2)茶園において,雌介殻内のクワシロ卵を高湿度に保つ方法について,スプリンクラーを用いて試験した。チャの枝が常に濡れた状態になるように,日中断続的に散水(1日1haあたり120~150t)することで,クワシロの卵は雌介殻内で褐変し死亡した。茶園においては,クワシロ卵のふ化開始以降,スプリンクラーを用いて16日間高湿度状態にすることで,クワシロ卵のふ化を効果的に抑制することが可能である。","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132302905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"How to Make Tea in Tsushima Mitsushima Neo","authors":"S. Nimura","doi":"10.5979/CHA.2007.69","DOIUrl":"https://doi.org/10.5979/CHA.2007.69","url":null,"abstract":"","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122014934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Miura, K. Uchimura, T. Kaji, Takahisa Nakamura, S. Yoshida, Masato Katsuda, Mitsuaki Karasuyama
{"title":"Effects of Application Using Coated Urea and Dicyandiamide for Tea Field","authors":"N. Miura, K. Uchimura, T. Kaji, Takahisa Nakamura, S. Yoshida, Masato Katsuda, Mitsuaki Karasuyama","doi":"10.5979/CHA.2007.41","DOIUrl":"https://doi.org/10.5979/CHA.2007.41","url":null,"abstract":"茶園土壌における長期間の硝化抑制効果を目的として,硝化抑制剤Ddと尿素を被覆したDd入り被覆尿素の施用技術を検討した。Dd入り被覆尿素70日タイプの溶出は,被覆尿素70日タイプより,特に低温時期で溶出が著しく遅かった。被覆尿素70日タイプと同じ溶出特性を得るためには,春肥ではDd入り被覆尿素40日タイプの施用が望ましいと考えられた。また,秋肥及び夏肥,春肥でDd入り被覆尿素を利用すると,Ddの硝化抑制作用により,被覆尿素よりも窒素溶脱が低減し,施肥窒素の吸収率が高まることで,二,三番茶の品質が向上した。しかし,Dd入り被覆尿素を年間を通じて連用すると,3~4年目はうね問土壌中に蓄積した窒素の分解や,アンモニア酸化細菌による硝化の抑制が低下することにより,溶脱窒素濃度が低下しない可能性が認められた。","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122188833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Determinatin of the Geographical Origin in Different Soil Parent Materials of Tea with Inorganic Element Composition","authors":"K. Uchimura, Masato Katsuda, N. Miura","doi":"10.5979/CHA.2007.51","DOIUrl":"https://doi.org/10.5979/CHA.2007.51","url":null,"abstract":"(1) 茶葉中無機元素含量は,一心三葉の分析ではMg,BaおよびCu含量に,荒茶の分析ではBaに品種間差が認められた。(2)荒茶中の12元素(K,Ca,Mg,Al,B,Ba,Cu,Fe,Mn,Ni,Sr,Zn)を用いた主成分分析結果から,第1主成分で因子負荷量が高い値を示したBa,Ca,Srはシラスとそれ以外の土壌を,第2主成分で因子負荷量が高い値を示したAlとMnは火山灰と安山岩あるいは花崗岩を概ね分類する傾向にあった。(3) 判別分析の結果,土壌の母材ごとの4群の産地判別には,Ba,Mn,K,B,Sr,Znの6元素が有効であった。得られた判別式の信頼性をモデルに用いなかった26点の荒茶試料で検定した結果,73%の判別適中率であった。(4) 火山灰とその他の土壌の2群の産地判別には,Mn,Ba,K,Ni,Znの5元素が有効で,その判別適中率は80%であった。","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124085961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Newly Supply System of Tea Cultivars and an Outline of the Seeds and Seedlings Low on Tea","authors":"A. Nesumi","doi":"10.5979/CHA.2006.102_17","DOIUrl":"https://doi.org/10.5979/CHA.2006.102_17","url":null,"abstract":"","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127662386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Araki, D. Miyama, O. Sumikawa, M. Miyazaki, Kunimichi Higashi
{"title":"Development and Characteristics of the Boom Type Blow Head for Tea Field Fertilizer Application","authors":"T. Araki, D. Miyama, O. Sumikawa, M. Miyazaki, Kunimichi Higashi","doi":"10.5979/CHA.2006.102_1","DOIUrl":"https://doi.org/10.5979/CHA.2006.102_1","url":null,"abstract":"茶園施肥作業時間の短縮を目的とした省力施肥作業の開発のため,背負動力散粒機に装着するパイプの噴頭を試作し,背負動力散粒機と組み合わせ散布特性調査を行い以下の結果を得た。1)背負動力散粒機に装着する茶園施肥用パイプ噴頭を試作した。2)試作したパイプ噴頭は背負動力散粒機より排出された資材を高い精度で2分し,理論作業幅を拡げ,施肥作業時間短縮の可能性が示された。3)背負動力散粒機の繰り出し精度は変動係数30%以下と確認された。4)実用的な散布技術に発展させるためには,パイプ噴頭と組み合わせる資材繰り出し装置の高精度化が必要であることが示された。","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127061346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of Direct Covering Period on the Growth and the Constituents in New Shoots of First Crop of Tea Bush","authors":"K. Chutani, Y. Takewaka","doi":"10.5979/CHA.2006.9","DOIUrl":"https://doi.org/10.5979/CHA.2006.9","url":null,"abstract":"直がけ被覆が生育や品質に及ぼす影響を明らかにするために,直がけ被覆期間の長短と被覆開始時期を変えて,一番茶芽の形質と成分含有率を検討した。直がけ被覆の期間が長いほど,新芽数あるいは百芽重の低下がみられ,摘芽重は減少した。また,葉色は被覆開始後3~5日で無被覆より濃くなり10日以上被覆するとさらに濃くなった。全窒素および遊離アミノ酸含有率は,直がけ被覆開始3~5日後に無被覆より高まり,被覆期間による差はみられなかった。また,タンニン含有率は直がけ被覆開始後3~5日後に無被覆より低下し,被覆開始時期が早いほど低く推移する傾向であった。一方,NDF含有率には,直がけ被覆の影響はみられなかった。","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"215 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128777184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Several Pesticides on the Citrus Spiny Whitefly, Aleurocanthus spiniferus (Quaintance), by the Leaf-dip Method and Application Tests in a Tea Field","authors":"K. Yamashita, Yoshikimi Hayashida","doi":"10.5979/CHA.2006.25","DOIUrl":"https://doi.org/10.5979/CHA.2006.25","url":null,"abstract":"京都府のチャで発生したミカントゲコナジラミに対して有効な薬剤を選定するために,数種殺虫剤を供試して漬浸法により殺虫効果を検討した結果,DMTP,フェンプロパトリン,アセタミプリド,ブプロフェジン,スピロメシフェン,ミルベメクチンおよびトルフェンピラドの殺虫効果が高かった。殺虫効果の高かった薬剤のうち4薬剤の防除効果を確認したところ,ブプロフェジン,スピロメシフェン,トルフェンピラドの防除効果は高かったが,アセタミプリドはやや低かった。","PeriodicalId":201655,"journal":{"name":"Chagyo Kenkyu Hokoku (Tea Research Journal)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128165579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}