Differences in Micrometeorology of Leather Fern Growing Greenhouse between Well Grown and Damaged by Mottled Yellowing Syndrome.
スポンサーリンク
概要
- 論文の詳細を見る
Leather fern is a major horticultural plant in Hachijo Island, Tokyo and has been grown in protected cultivation. The visual damage of leather fern leaves called "Mottled Yellowing Syndrome (MYS)" has occurred on the leaves cultivated in greenhouses since 1990's. Appearance of MYS on the leaves reduces their market value.In order to elucidate the cause of the occurrence of MYS, we investigated the environments of leather fern greenhouse by field survey and interviews with greenhouse owners. Furthermore, we measured the micrometeorology of both a greenhouse with MYS (MYS house) and a greenhouse without MYS (non-MYS house) in August 1997.From field investigation and measurements, the following results were revealed.(1) MYS occurred in greenhouses with low shading material and low ventilation area, which were enclosed by thick windbreaks or surrounding hill slopes.(2) MYS occurred in poorly irrigated greenhouses with inadequate water supply and longer drought period.(3) There were obvious micrometeorological differences between the MYS house and the non-MYS house. Light transmittances of MYS and non-MYS houses were 44% and 17%, and the ventilation-coefficient of the MYS house was 1.9 times higher than that of the non-MYS house. Air temperature and relative humidity inside the MYS house were 3.3°C and 9% higher than outside, while those in the non-MYS house were 1.2°C higher and 3% lower than outside. Soil water potentials of MYS and non-MYS houses were 0.003 and 0.023MPa, respectively.(4) MYS of leather fern occurred in greenhouses under conditions of high air- soil- temperature, high evaporation, and low soil water contents.(5) The low humidity around the plants could bring about water stress on the plant; thus not only the high temperature stress but also water stress or both could cause MYS.
- 日本農業気象学会の論文
日本農業気象学会 | 論文
- 局地気象学における赤外線放射温度計と熱赤外画像計測装置の有効利用
- 局地風(2)冷気の流れ
- 密閉式チャンバー法を用いた夜間の水蒸気フラックスの測定
- カキ'西条'における耐凍性の系統間評価
- 気象条件が花粉飛散を介してトウモロコシの交雑率に与える影響