AGR 2470 Lecture Notes - Lecture 8: Transpiration, Ice Crystals, Mulch
4 Oct 2016
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Agr 2470 lecture 8 temperature (cont"d) and moisture and plant agriculture. Freezing temp. damage plants through dehydration and damage from cellular ice crystal formation. Frost control: escape = seed/plant after frost dates, reduce nighttime heat loss = tunnels. Row covers : add heat at night = sprinkler irrigation (latent heat in water), heaters , increase daytime heat absorption = don"t use organic mulch, moisten soil. Water (like temp) influences geographic location of crop plants. Primary limiting factor for crop productivity in many regions on earth (not in on though) Through transpiration, plants use large quantities of water: 99% of water used by plant lost through transpiration. Promotes turgor in plant cells; necessity in plant growth. Constitutes vast majority of weight in many horticultural crop harvest. Precipitation affects where crops are grown globally even though wheat, corn, and rice are grown across a wide range of precipitation zones. Impact of moisture on transpiration and crop development.
