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The wilting point, also called the permanent wilting point, may be defined as the amount of water per unit weight or per unit soil bulk volume in the soil, expressed in percent, that is held so tightly by the soil matrix that roots cannot absorb this water and a plant will wilt.
Permanent plant wilting occurs when the volumetric water content in the soil is too low for the plant’s roots to extract water. About half of the water in the soil at field capacity is held too tightly to be accessible to plants.
Permanent wilting point: Water content at which soil has dried to the point that plants begin to wilt. Described quantitatively as the soil water content after saturated soil is exposed to a...
27 Δεκ 2021 · Permanent Wilting Point. It is defined as the minimum amount of water in the soil that the plant requires not to wilt. If the soil water content decreases to this point, a plant wilts and can no longer recover its turgidity when placed in a saturated atmosphere for 12 hours. Here permanent loss of turgidity in cells.
The permanent wilting point is determined as the soil moisture content at which the plant is no longer able to absorb water from the soil causing the plant to wilt and die if additional water is not provided.
The permanent wilting point plays a crucial role in determining the amount of available water for plants within the root zone. When soil moisture falls below this threshold, plants can no longer extract enough water to maintain their physiological processes, leading to wilting.
Knowing the permanent wilting point is essential for effective irrigation management to prevent crop failure during dry periods. Permanent wilting point can be influenced by factors such as soil structure, organic matter content, and compaction.
