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Publication Date
1977
Description
Two experiments were carried out under glasshouse conditions to study the effect of soil water stress on guinea grass and glycine. The design was a random block design with four replications. Treatments were: water application when soil humidity was reduced 25 %, 50 %, 75 % and to wilting point in relation to field capacity. Dry matter yields, leaf number and transpiration efficiency of glycine were significantly reduced (P < 0.001) as were the number of tillers (P < 0.01) and nodules (P < 0.05) with the decrease in available soil humidity. Guinea grass yields (dry) were only reduced when available soil humidity decreased from 75 % to wilting point, glycine being more affected than guinea grass. Root weight, leaf and tiller number and transpiration efficiency of guinea grass were not affected by changes in soil humidity. Results suggest a higher drought resistance of guinea grass than glycine since that species made a more efficient water usage, having a more developed root system.
Citation
Suarez, J J., "Effect of soil water stress on biological parameters of guinea grass (Panicum maximum Jacq.) and glycine ( Glycine wightii)" (1977). IGC Proceedings (1977-2023). 18.
(URL: https://uknowledge.uky.edu/igc/1977/sess1/18)
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Effect of soil water stress on biological parameters of guinea grass (Panicum maximum Jacq.) and glycine ( Glycine wightii)
Two experiments were carried out under glasshouse conditions to study the effect of soil water stress on guinea grass and glycine. The design was a random block design with four replications. Treatments were: water application when soil humidity was reduced 25 %, 50 %, 75 % and to wilting point in relation to field capacity. Dry matter yields, leaf number and transpiration efficiency of glycine were significantly reduced (P < 0.001) as were the number of tillers (P < 0.01) and nodules (P < 0.05) with the decrease in available soil humidity. Guinea grass yields (dry) were only reduced when available soil humidity decreased from 75 % to wilting point, glycine being more affected than guinea grass. Root weight, leaf and tiller number and transpiration efficiency of guinea grass were not affected by changes in soil humidity. Results suggest a higher drought resistance of guinea grass than glycine since that species made a more efficient water usage, having a more developed root system.
