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ID 49157
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Effect of Supplied Amount and Strength of Nutrient Solution on Growth, Yield, and Fruit Quality of Strawberry ‘Saga-honoka’ Grown with Sufficiently Elevated CO2
Author
Inazumi, Daichi
Abstract
The effects of supplied amount and strength of nutrient solution were investigated for strawberry (Fragaria×ananassa Duch. cv. Saga-honoka) grown with peat bags in elevated CO2 environment (800-2500 ppm in the day time, November 4 to April 7). Three strengths (L : low-80%, M : standard-100% and H : high-120%) of nutrient solution (N : 8.85, P : 0.85, K : 3.90, Ca : 2.05, Mg : 0.93 mM ; half strength of Ohtsuka A solution) were compared. Around 20% of discharged rate (discharged/supplied amount of nutrient solution) was kept for these 3 plots and 30 to 40% of the rate was kept for additional plot of 80%-solution (L2) by altering the supplied amount of 80%-solution. As almost no nitrate could be detected in drainage of L, nutrient supply was probably insufficient throughout the experiment. Total amount of nitrogen supply was lower than the other 3 plots and leaf area was the smallest after December. Although there was no significant difference in yield and fruit quality, the rate of tip burn affected flowers was lowest in L2 and highest in H. Thus, around 30-40% of drainage rate and 50-60 mS・m−1 of drainage EC may be desirable target values for ‘Saga-honoka’ strawberry grown with peat based substrate.
Abstract Alternative
イチゴ‘さがほのか’を用いて,高CO2濃度条件下(日中800~2500ppm)での栽培における培養液濃度と施用量の影響について検討した.培養液は排液率20%を目標に,大塚A処方を30~50%濃度で適宜変更する慣行区を標準として,濃度をその1.2倍,0.8倍とする高濃度区と低濃度区,さらに低濃度区においては,給液量を1.2倍(排液率35%)とする低濃度多量区を設け,計4処理区とした.排液率20%を目標とした低濃度培養液管理では,12月以降の排液中NO3-Nは検出限界以下であり,栽培期間を通して養分が不足しがちであった.また,全N施用量も他の3処理区と比較すると少なくなり,1月以降の葉面積が小さくなった.収量・果実品質においては処理区間で有意な差は認められなかったが,チップバーン発生率は,高濃度区で高く,低濃度多量区の発生率が最も低かった.低濃度多量区では,葉面積も大きくなったことから,‘さがほのか’においては,排液率30~40%,排液EC50~60mS・m-1を目標とした低濃度での培養液管理が望ましいといえる.
Keywords
nutrient absorption
tipburn
titratable acid
total soluble solid
Note
原著論文 (Original paper)
Published Date
2013-02-01
Publication Title
岡山大学農学部学術報告
Publication Title Alternative
Scientific Reports of the Faculty of Agriculture Okayama University
Volume
volume102
Publisher
岡山大学農学部
Publisher Alternative
Faculty of Agriculture, Okayama University
Start Page
15
End Page
20
ISSN
2186-7755
Content Type
Departmental Bulletin Paper
language
日本語
File Version
publisher
Refereed
False
Eprints Journal Name
srfa