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Texas A&M University - Kingsville (1994)

Crop response to intermittent irrigation with saline water

Malladi, Gopikrishna

Titre : Crop response to intermittent irrigation with saline water

Auteur : Malladi, Gopikrishna

Université de soutenance : Texas A&M University - Kingsville

Grade : Master of Science (MS) 1994

Saline water can be harmful to plants because of osmotic effects, infiltration effects, and specific-ion toxicity. Irrigation under arid conditions has been extensively studied, but little is known about the effects of saline water irrigation under semi-arid conditions where occasionally substantial amounts of rain are received. Beans, sorghum, cotton, and bermudagrass were grown separately for six weeks in a controlled-environment growth chamber. A completely randomized factorial design was established with nine treatments that included irrigation waters having three different salt levels, and three different patterns of simulated irrigations interspersed with simulated rainfall events. In addition to the nine treatments, a tenth treatment (simulated rain) was also established. Crops were irrigated weekly for six weeks. No significant interactions were found between salinity and irrigation application pattern. Significant response was observed on bean shoot and root growth from the pooled effects of salinity and application pattern (p $<$.05). Significant response was also observed on cotton shoot and root growth following sorghum from the pooled effects of salinity (p $<$.05), sorghum root growth and bermudagrass absolute growth from pooled effects of application pattern (p $<$.05). Salinity in the upper third of the container soil related significantly to bean shoot weights. Growth of other crops did not correlate significantly to the soil salinity

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