JP5906085B2 - 水耕栽培における植物体の有用成分含有量向上方法 - Google Patents
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G29/00—Root feeders; Injecting fertilisers into the roots
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Botany (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Hydroponics (AREA)
- Cultivation Of Plants (AREA)
Description
2.該所定期間が2〜12日の期間である、上記1の生産方法。
3.空気に曝露させる根の上記少なくとも一部が、根の起始部から1cm以上又は根の起始部から全長の3%以上の長さにわたり、且つ根の先端から根の全長の3%未満までの部分には及ばないものである、上記1又は2の生産方法。
レタス、水菜、ホウレンソウ、春菊、及び小松菜の水耕栽培を行った。栽培条件は、白色蛍光灯下、明期14時間/暗期10時間のサイクルとし、養液としては、肥料(大塚ハウス肥料 SA処方)の水溶液を用いた。この養液の成分組成は次の表1のとおりである。
方法: 植物体に対し一定量の5%メタリン酸を加えて希釈しながら、ミキサーを用いてサンプルを破砕した後、破砕液を12,000rpmで1分間遠心分離した。上澄み液を用い、反射式光度計RQフレックス(藤原製作所製)でアスコルビン酸濃度を測定し、植物体100g当たりのアスコルビン酸含有量として算出した。
方法: 植物体に対し水100mLを加えてミキサーで破砕し、破砕液を12,000rpmで1分間遠心分離した。上澄み液の糖度をポケット糖度計(PAL-1;アタゴ製)を用いて測定し、その値に基づき、生の植物体に含まれる糖の重量パーセントとして糖度(Brix (% ))を算出した。
方法: 硝酸態窒素含有量については、上記「アスコルビン酸含有量の測定」において調製した上澄み液を一定量の水で希釈し、その後、アスコルビン酸の場合と同様、反射式光度計RQフレックス(藤原製作所製)を用いて測定を行った。
根圏部分曝露処理においてパネルと養液面との隙間を0.5、1、2、4、5、10、15、20、25、又は30cmとした10群を設けることにより、空気に曝露される根の長さ(曝露長)をこれらの長さの何れかとした以外は、実施例1と同様の方法でレタスを栽培し、収穫した。なお、根圏部分曝露処理の開始時点での根の長さは平均30.9cmであり、曝露長30cmの群では、根の先端がわずかに養液に浸っているに過ぎない状態であった。収穫したレタスについて、実施例1と同様の方法でアスコルビン酸含有量を測定した。
根圏部分曝露処理日数と植物体の有用成分含有量との関係を検討するために、上記実施例1と同様にしてレタスを育苗し、次いで曝露長を4cmとして、0、3、7、9、12又は14日間にわたる根圏部分曝露処理を行い、植物体を収穫し、アスコルビン酸含有量を測定した。
根圏部分曝露処理による植物体のポリフェノール含有量への影響につき検討するため、上記実施例1と同様にしてレタスを育苗し、次いで養液の水位を低下させて栽培パネルと養液面の間に4cmの隙間を設け、植物体の根の起始部側4cmの長さにわたる部分がその隙間において空気に曝露される状態とし、その状態で1週間にわたって栽培を継続した(根圏部分曝露処理)。次いで収穫し、下記の方法により、植物体中のポリフェノール含有量を測定した。
植物体を液体窒素中で凍結させ破砕したサンプル1gに対し80%エタノールを10ml加えて、冷暗所で2時間静置し、3000rpmで5分間遠心分離して得られた上澄みをポリフェノール抽出液とした。
フォーリンチオカルト法により、抽出液のポリフェノール含有量を測定した。すなわち抽出液1mlに1/2希釈したフェノール試薬(MPバイオケミカル社製)1mlを加えて混合し、更に10%炭酸ナトリウム水溶液を1ml加えて攪拌して室温で60分間静置した。その後、分光光度計(UV-160;島津製作所)にて吸光度700nmの吸光度を測定した。リファレンス試料としてケルセチンを用い、試料中のポリフェノール含有量をケルセチン当量(mg ケルセチン/新鮮重量)として算出した。
上記実験と同様に、栽培パネルと養液面との空間を4cmとしてレタスに対し3〜14日間の根圏部分曝露処理を行った。処理後、乾物重量及び新鮮重量を測定して水分含有率を算出した。
結果を図7及び8に示す。図7に示すとおり、3〜10日間の根圏部分曝露処理による生長への負の影響はほとんどなかった。但し、14日間の処理では10%程度の収量の低下が見られた。一方、図8に示すとおり水分含有率は処理期間中ほとんど変化せず、食感など品質に対する影響はないことが分かった。
また本結果より、上記一連の実施例における栄養成分及び抗酸化成分の含有量の増加は、濃縮によるものでなく、絶対量の増加であると考えられる。また、2〜12日間上記のように根の一部を空気中に曝露させることによっては、作物の収量(生育)および食感等の品質に対する悪影響のないことが明らかとなった。
Claims (1)
- 水耕栽培による野菜の生産方法であって、該野菜の収穫に先立って、2〜12日の期間にわたり根の一部を空気に曝露させた状態で栽培することを特徴とするものであり、空気に曝露させる根の該一部が、根の起始部から1cm以上又は根の起始部から全長の3%以上の長さにわたり、且つ根の先端から根の全長の3%未満までの部分には及ばないものである、生産方法。
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JP2009091489 | 2009-04-03 | ||
JP2009091489 | 2009-04-03 | ||
PCT/JP2010/056011 WO2010114091A1 (ja) | 2009-04-03 | 2010-04-01 | 水耕栽培における植物体の有用成分含有量向上方法 |
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JPWO2010114091A1 JPWO2010114091A1 (ja) | 2012-10-11 |
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GB0311953D0 (en) * | 2003-05-23 | 2003-06-25 | Karpinski Stanislaw | Plant treatment method and means therefor |
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2010
- 2010-04-01 WO PCT/JP2010/056011 patent/WO2010114091A1/ja active Application Filing
- 2010-04-01 JP JP2011507287A patent/JP5906085B2/ja active Active
- 2010-04-01 CN CN2010800158176A patent/CN102368901A/zh active Pending
- 2010-04-01 KR KR1020117026125A patent/KR20110137387A/ko not_active Application Discontinuation
Patent Citations (9)
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JPS5075826A (ja) * | 1973-11-01 | 1975-06-21 | ||
JPS55156525A (en) * | 1979-05-23 | 1980-12-05 | Sanzou Watanabe | Shaping and growing of plant |
JPS56140835A (en) * | 1981-03-06 | 1981-11-04 | Yanmar Agricult Equip | Water cultivating method |
JPS6296017A (ja) * | 1985-10-23 | 1987-05-02 | 内藤 喜八郎 | 根上がり植木の育成方法 |
JPH07177830A (ja) * | 1993-12-22 | 1995-07-18 | Yoshitami Yanohara | 水耕栽培方法 |
JP2002272288A (ja) * | 2001-03-19 | 2002-09-24 | Yoshihiko Mizushima | 植物水耕栽培の方法及び装置 |
JP2005198555A (ja) * | 2004-01-15 | 2005-07-28 | Soatec Inc | 養液栽培用システム |
JP2004321193A (ja) * | 2004-08-02 | 2004-11-18 | Shiga Pref Gov | 植生方法 |
JP2006129704A (ja) * | 2004-11-02 | 2006-05-25 | Hiroyuki Katsumura | 中水を利用した水栽培による緑化方法。 |
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WO2010114091A1 (ja) | 2010-10-07 |
JPWO2010114091A1 (ja) | 2012-10-11 |
KR20110137387A (ko) | 2011-12-22 |
CN102368901A (zh) | 2012-03-07 |
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