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Response of Gaillardia aristata Pursh to salinity

The performance of Gaillardia aristata Pursh, irrigated with saline water was studied with the objective to identify herbaceous ornamentals for saline landscapes.‎ Seeds were sown directly into fi eld plots of sandy soil and irrigated with saline water at electrical conductivity (ECW) of 2 (control), 5, 10 and 15 dSm-1.‎ Increase in salinity reduced the plant stand by 38% at 5 dSm-1, 50% at 10 dSm-1 and 67% at 15 dSm-1, in comparison with the control.‎ Increased salinity also decreased the mean height, number of branches and dry weight of the plants, but the differences among treatments lower than 15 dSm-1 salinity were statistically insignifi cant (P>0.‎05).‎ Compared with the control, the number of fl owers per plant declined by 57% at 5 dSm-1, 61% at 10 dSm-1 and 67% at 15 dSm-1.‎ The differences in fl ower production among 5, 10 and 15 dSm-1 treatments were not signifi cant (P>0.‎05).‎ The fl ower diameter was signifi cantly reduced at 15 dSm-1, but was not affected at the lower salinities.‎ The results show that G.‎ aristata could be successfully cultivated upto irrigation water salinity level 10 dSm-1 in sandy soils.‎

Authors: 
N.‎ Kameswara Rao, Mohammed Shahid
Year: 
۲۰۱۱
Publication type: 
Scientific Paper
Publication Source: 
Journal of Applied Horticulture
Volume/Chapter/Issue: 
۱۳
Page Number: 
٦۵-٦۷