水ポテンシャル測定法とニ・三の測定例
スポンサーリンク
概要
- 論文の詳細を見る
Soil, plant and atmosphere form a physically unified system in which water flow takes place from higher to lower potential energy of water. To understand the water flow through the plant as a part of water flow in the system, the water potential based on energy concept, which was proposed by Slatyor and Taylor in 1960, is the most desirable unit. Therefore, we presented a method of measuring the water status by using a thermocouple psychometer, which can measure water potential comparatively easily. We also examined the effect of some environmental factors on the water potential of the plant, and showed the results. The time required for a thermodynamical equiliblation of vapor pressure within the sample chamber was different according to sample materials. We made a caliblation check on each of the three apparatus, and concluded all of them to be reliable. We measured the component potentials of organs of rape. Osmotic potential was measured with the freezing and thawing method. Relationship of osmotic potential and water potential was different between organs. By using corn stems, we examined estimating the osmotic potential from its sap water potential. As a result, this method was found to be usefull for speedy measurement. We examined the relation between the water content and the water potential of Kuriyagawa volcanic ash soil and Ishidoriya alluvial soil. There was found a clear difference between these two soils. Futhermore, we examined the effects of the water potential of soil, atmosphere and light intensity on the water potential of the plant. It was thought that soil water potential decided the highest value of water potential of plant, and water potential of atmosphere controlled the diurnal change of plant water potential. Light intensity also affected the water potential of plant through the effect of stomatal aperture, but it was not so great. The diurnal change of the water potential gradient in the soil-plant-atmosphere system was observed on a hot summer day. In the daytime, the water flow was controlled mainly by the water potential of atmosphere. In the evening, the water deficiency of soil around the roots came to restrict the water flow in the system. In the night, there appeared water potential gradient again with the recovery of water stress of soil around the roots, and this was regarded to indicate that water was flowing through the plant at a little rate.
- 日本作物学会の論文
- 1977-03-30
著者
関連論文
- 多穂性程度の異なるトウモロコシ品種の登熟期における同化産物の転流
- 85 トウモロコシの雌穂不稔抵抗性と同化産物の転流
- 土壌環境条件に対する二・三畑作物の根の生育反応
- 雌穂不稔抵抗性の異なるトウモロコシ品種の施肥反応の差異
- トウモロコシの葉身姿勢の品種間差異
- 23 トウモロコシの全重の栽植密度反応とその品種間差異
- 気象条件の異なる年次におけるトウモロコシ葉身直立姿勢の子実収量への影響
- 火山灰土壌における畑作物に対する肥料三要素および堆肥の影響
- トウモロコシ1穂型品種と2穂型品種の子実重に対する受光量制限の影響(予報)
- 葉身の直立姿勢がトウモロコシの個体群乾物生産および子実収量に及ぼす影響
- 時期別の光条件の変化がとうもろこしの子実重に及ぼす影響
- 栽植密度がトウモロコシの雌穂発育におよぼす影響
- 116 トウモロコシの群落構造と物質生産に関する研究 : 第2報 日照条件の異なる年次におけるトウモロコシ葉身直立姿勢の子実収量に及ぼす影響
- 65 耕地管理の粗放化に伴う作付の変化と生産力への影響 : 東北地方における畑作の実態
- 60 温度に対するトウモロコシの生育反応 : 開放型生育環境制御施設の構造と機能,その3
- 17 とうもろこしの群落構造と物質生産に関する研究 : 第1報 葉身の直立姿勢と群落乾物生産
- 水ポテンシャル測定法とニ・三の測定例
- トウモロコシの生育ならびに体内成分の推移に関する研究 : 第12報 2穂型品種の不稔雌穂着生位置と稈のTAC濃度との関係
- トウモロコシの生育ならびに体内成分の推移に関する研究 : 等11報 2穂型品種の栽植密度反応
- 長期の作付方式ならびに燐酸, 堆肥の施用量の違いによる残効の差について
- 115 作物体の水ポテンシャルと環境要因との関係
- 114 開放系生育環境制御施設の構造と機能 : 2. だいず生育からみた環境制御効果
- 作物組織体の水ポテンシャル測定について(予報)