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Publication Type J
Authors Carter, C. T., C. M. Grieve and J. A. Poss
Title Salinity effects on emergence, survival, and ion accumulation of Limonium perezii
Source Journal of Plant Nutrition
Author Keywords ion accumulation; salinity stress; seedling emergence; seed germination; statice; wastewater water relations; horticultural crops; growth; germination; chloride; stress; ratios; plants; yield; soils
Abstract Saline wastewaters may provide a valuable water source for the irrigation of selected salt-tolerant floriculture crops as water quality and quantity becomes limited and as demand for quality water increases. A 2 x 7 factorial design with three replications was used to test the effects of water ionic composition and salinity, respectively, on emergence, survival, and mineral accumulation of the salt-tolerant cut flower Limonium perezii (Stapf) F. T. Hubb cv. 'Blue Seas.' Seeds (n = 100) were sown in each of 42 presalinized greenhouse sand tanks. Irrigation water composition represented saline drainage waters typically present in either the San Joaquin Valley (SJV) or the Imperial/Coachella Valleys (ICV) of California. Electrical conductivity levels of the treatment waters were 2.5 (control), 6, 8, 10, 12, 16, and 20 dS m(-1), respectively. Seedling emergence was monitored daily and leaf mineral concentrations (total sulfur (S), total phosphorus (P), Ca2+, Mg2+, Na+, K+, and Cl-) were determined three months after planting. A two-way ANOVA revealed that salinity had a significant effect on seedling emergence (F = 27.56; P < 0.01). Cumulative emergence showed a marked decrease above 12 dS m(-1) for both water treatments and tended to be greater from 6-10 dS m(-1) than at 2.5 dS m(-1). A significant interaction of salinity and water composition was found for survival (F = 2.90; P < 0.05). Survival approximated 90% in ICV and SJV treatments up to 8 and 10 dS m(-1), respectively, yet continued to decrease below 70% in both water treatments at 12 dS m(-1) and higher. Differences in leaf-mineral concentrations between ICV and SJV water composition can be attributed to differences in composition of irrigation waters. As salinity increased, leaf Ca2+, K+, and total P decreased, whereas Mg2+, Na2+, Cl-, and total S increased. Stem length showed a marked decrease above 2.5 and 6 dS m(-1) under ICV and SJV treatments, respectively, with SJV waters producing similar to 30% more marketable flowers at salinities up to 6 dS m(-1). Thus, Limonium perezii maybe produced commercially with moderately saline wastewaters.
Author Address ARS, USDA, George E Brown Jr Salin Lab, Riverside, CA 92507 USA. Carter, CT, ARS, USDA, George E Brown Jr Salin Lab, 450 W Big Springs Rd, Riverside, CA 92507 USA. ccarter@ussl.ars.usda.gov
29-Character Source Abbreviation J. Plant Nutr.
Year Published 2005
Volume 28
Issue 7
Beginning Page 1243-1257
Unique Article Identifier ISI:000230989200011
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