@article{oai:repository.naro.go.jp:00002007,
 author = {齋藤, 寿広 and SAITO, Toshihiro and 壽, 和夫 and KOTOBUKI, Kazuo and 阿部, 和幸 and ABE, Kazuyuki and 澤村, 豊 and SAWAMURA, Yutaka and 佐藤, 義彦 and SATO, Yoshihiko and 寺井, 理治 and TERAI, Osamu and 正田, 守幸 and SHODA, Moriyuki and 髙田, 教臣 and TAKADA, Norio and 西端, 豊英 and NISHIBATA, Toyohide and 栗原, 昭夫 and KURIHARA, Akio and 平林, 利郎 and HIRABAYASHI, Toshiro and 佐藤, 明彦 and SATO, Akihiko and 樫村, 芳記 and KASHIMURA, Yoshiki and 小園, 照雄 and KOZONO, Teruo and 福田, 博之 and FUKUDA, Hiroyuki and 木原, 武士 and KIHARA, Takeshi and 鈴木, 勝征 and SUZUKI, Katsuyuki and 内田, 誠 and UCHIDA, Makoto},
 journal = {果樹研究所研究報告, Bulletin of the National Institute of Fruit Tree Science},
 month = {Mar},
 note = {Natsushizuku' is an early maturing smooth skin type new cultivar of Japanese pear (Pyrus pyrifolia Nakai) released in 2004 by the National Institute of Fruit Tree Science, National Agriculture and Food Research Organization. It originated from the cross between 'Nashi Hiratsuka 25' ('Kousui'×'Kikusui') and 'Chikusui' in 1990. It was selected as a promising tree in 1998, and subjected to the 7th regional adaptability test of pear as Nashi Tsukuba 50 from 1999, conducted at 34 experimental stations in 34 prefectures in Japan. It was designated and registered as 'Nashi Norin 23' on September 15, 2005, and also registered as No. 16480 under the Seed and Seedlings Law of Japan on March 13, 2008. Compared with 'Kousui', tree vigor is a little stronger, the amount of fruit spurs is greater, and the amount of axillary flower buds is the same. It is cross-compatible with 'Kousui', 'Housui', 'Gold Nijisseiki' and 'Chojuro'. It blooms at the same time as 'Kousui', and ripens about one week earlier than 'Kousui'. It is resistant to black spot, and there is no serious problem of diseases or insect pests under standard spraying programs. The fruit is oblate in shape, weighs about 320g, and is as large as 'Kousui'. The fruit skin becomes somewhat russet when grown under non-bagging culture as well as under bagging culture. The flesh hardness is under 5.0 lbs, being as soft as that of 'Kousui'. The soluble solids content and the pH in juice average around 12% and 5.1, respectively, both of which are as high as those of 'Kousui'. The eating quality is the same as 'Kousui'.},
 pages = {11--22},
 title = {ニホンナシ新品種 'なつしずく'},
 volume = {9},
 year = {2009},
 yomi = {サイトウ, トシヒロ and コトブキ, カズオ and アベ, カズユキ and サワムラ, ユタカ and サトウ, ヨシヒコ and テライ, オサム and ショウダ, モリユキ and タカダ, ノリオ and ニシバタ, トヨヒデ and クリハラ, アキオ and ヒラバヤシ, トシロウ and サトウ, アキヒコ and カシムラ, ヨシキ and コゾノ, テルオ and フクダ, ヒロユキ and キハラ, タケシ and スズキ, カツユキ and ウチダ, マコト}
}