Abstract
In Egypt, this study was carried out to determine variations in the chemical constituents within Atriplex nummularia as well as among seven other Atriplex species, crude protein, crude fiber extract, saponin and ash percentages were determined in dry matter. The content of macronutrients such as phosphorus, sodium, potassium and calcium were also determined. In addition, micronutrients such as manganese, zinc and copper were measured. There were negative correlations (highly significant) between potassium vs. calcium and magnesium. Whereas, positive correlations (highly significant) between calcium and magnesium were found in A. nummularia. A. nummularia had the highest value of crude protein content (17.51%) whereas A. semibaccata had the lowest (11.3%). The highest crude fiber was 27.7% for A. undulata and lowest was 17.8 and 18.3% for A. amnicola and A. vesicaria, respectively. Ash percentages varied considerably with A. vesicaria having the highest value (13.4%) and lowest for A. canescens (12.6%). Species showed varied values of sodium ranging from 7.1-2.4%. The sodium content of A. canescens was lowest (2.4%). On the other hand, A. semibaccata, A. amnicola and A. undulata had lowest potassium concentration within the tissue. It may be due to competition between uptake of ions such as sodium and potassium.
In Utah (USA), metabolic heat rate is an important screening technique for salinity and/or drought. Effect of salt stress on metabolic heat rate of root tips and leaves of forage kochia (Kochia prostrata L.) were measured using isothermal microcalorimetry. Both salt and mannitol decreases in metabolic heat rate of about 50% of the initial heat rate in root tips. Recovery from salt or mannitol requires about ten hours. Effects of salt stress are partially due to changes in osmotic pressure. Metabolic heat rates were measured as a function of salinity and water stress for different accessions of forage kochia. Results may indicate and confirm that selection at early stage of growth may provide a good source of forage irrigated with saline water.
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© 1993 Springer Science+Business Media Dordrecht
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Belal, A.H., Rammah, A.M., Hopkin, M.S., Hansen, L.D., McArthur, E.D. (1993). Studies of salt-tolerance and chemical analysis of fodder shrubs in Egypt and Utah (USA). In: Lieth, H., Al Masoom, A.A. (eds) Towards the rational use of high salinity tolerant plants. Tasks for vegetation science, vol 28. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1860-6_27
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DOI: https://doi.org/10.1007/978-94-011-1860-6_27
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