Full TGIF Record # 71141
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/01904169709365336
    Last checked: 10/13/2015
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Author(s):Sagi, Moshe; Dovrat, Amos; Kipnis, Tal; Lips, Herman
Author Affiliation:Sagi: Ramat Negev Desert Agroresearch Center, D. N. Halutza, Israel; Dovrat: The Hebrew University of Jerusalem, Department of Field Crops, Vegetables, and Genetics, Faculty of Agriculture, Rechovot, Israel; Kipnis: Agricultural Research Organization, Volcani Center, Bet Dagan, Israel; and Lips: Department of Life Science, Ben-Gurion University of the Negev, Sede Boqer, Israel
Title:Ionic balance, biomass production, and organic nitrogen as affected by salinity and nitrogen source in annual ryegrass
Source:Journal of Plant Nutrition. Vol. 20, No. 10, 1997, p. 1291-1316.
# of Pages:26
Publishing Information:New York: Marcel Dekker, Inc.
Keywords:TIC Keywords: Ions; Biomass; Nitrogen; Salinity; Lolium multiflorum; Organic nitrogen compounds; Dry weight; Nitrogen fertilization; Fertilizer types; Comparisons; Sodium nitrate; Ammonium nitrate; Ammonium sulfate; Sodium; Anions; Metabolism; Sodium chloride; Calcium chloride; Minerals; Shoots; Roots; Cations; Osmotic potential
Cultivar Names:Westerwoldicum
Abstract/Contents:Studies on the effects of salinity and nitrogen (N) fertilization on ionic balance, biomass, and organic N production of annual ryegrass (Lolium multiflorum Lam.) were conducted. Plants grown in sand were irrigated with nutrient solution with an electrical conductivity of 2 or 11.2 dS-m⁻¹, and N in the form of sodium nitrate (NaNO₃), ammonium nitrate (NH₄NO₃), or ammonium sulfate [(NH₄)₂SO₄] ranging from 0.5 to 9.0 nM. Salinity increased the concentration of total inorganic cations (C) in plants and specifically sodium (Na) by more than 3-fold higher in plants grown at high salinity as compared with plants at low salinity. Sodium (Na) concentration in roots was higher than in shoots irrespective of the salinity level, suggesting a restriction of Na transport from roots to shoots. The concentration of total inorganic anions (A) increased with salinity and when plants were supplied with nitrate (NO₃), salinity increased the concentrations of NO₃, and chloride (Cl) in plants. Increasing salinity and N concentration in the growth medium increased organic anion concentration in plants, estimated as the difference between C and A. The effect of different N sources on C-A followed the order: NH₄NO₃ > NO₃ > ammonium (NH₄). The base of organic anions and inorganic ions with salinity contributed significantly to the osmotic potential of plants shoots and roots. Changes in C affected N and organic acids metabolism in plants, since C were highly correlated (p=0.0001) with C-A and organic N (Nₒ^D[r^D[g) concentration regardless of the salinity level or N source in the nutrient solutions. A high and positive linear dependency was found between Nₒ^D[r^D[g and C-A in plants grown at high and low salinity levels and different N sources, pointing out the close relationship between Nₒ^D[r^D[g and organic anion on metabolism under these conditions. The amount of biomass produced was correlated positively with organic anion concentration in plants exposed to different salinity levels. Plant biomass increased with N concentration in nutrient solutions regardless of the salinity level applied. Biomass accumulation decreased while Nₒ^D[r^D[g concentration increased with salinity. Organic N content remained unaffected in plants exposed to salinity when grown in N less tha 9.0 nM.
See Also:Other items relating to: SALMT
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sagi, M., A. Dovrat, T. Kipnis, and H. Lips. 1997. Ionic balance, biomass production, and organic nitrogen as affected by salinity and nitrogen source in annual ryegrass. J. Plant Nutr. 20(10):p. 1291-1316.
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    Last checked: 10/13/2015
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