国立研究開発法人 国際農林水産業研究センター | JIRCAS

Monitoring Fresh Weight of Leaf Lettuce 2. Effects of light, air temperature, relative humidity and Wind velocity

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Transitory changes in fresh weight of leaf lettuce. Which might be associated with the changes in ambient conditions, were analysed, thereby a suitable method for monitoring fresh weight was investigated. The fresh weight is temporarily lost by (1) illumination, (2) temperature rise at a constant relative humidity, (3) increase in vapor pressure deficit (VPD), and (4) increase in wind velocity, while it is gained under the opposite conditions. The fresh weight transitorily changed within 30 min after the state of exposure to different conditions. When the light conditions changed from dark to light, both of the transpiration rate and water saturation deficit of the leaves increased. The increase in temperature at a constant relative humidity caused loss of fresh weight, but the weight remained stable under a constant VPD. It was concluded that the transitory changes in fresh weight of leaf lettuce could be ascribed to the changes in transpiration rate. Therefore, the fresh weight as an indicator of plant growth has to be measured under the conditions that keep the transpiration rate constant.

刊行年月1992-07-01
作成者Masayuki ODA Kenkoh TSUJI
データ作成日1992-07-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
26
1
開始ページ19
終了ページ25
言語eng