Etude expérimentale de l’influence des sels solubles et analyse chimique de l’Atriplex halimus sub sp halimus et sub sp schweifurthii cas de Mostaganem et Oran

Abstract

The effect of increasing concentrations of four soluble salts (NaCl and Na2SO4, KCI and CaCl2), on germination, Atriplex halimus halimus sub sp and sp sub schweifurthii whose seeds are harvested from the region of Mostaganem and Oran. The results show thata germination of seeds of the species A. halimus sub sp halimus under effect of NaCl represents a delay of one day at doses of 2, 4 and 6% when the concentration increases the delay is two days .The Final germination rate is 46.66% per Atriplex against halimus sub sp schweifurthii germination is less than 30% for higher doses salt 18 and 20 g / l. Sprouting seeds species A. halimus sub sp halimus under effect of Na2SO4 has a low rate on the first day between 3.33 and 13.33% and speed of germination from the third day can reach 100% by 76.33 and against the germination Atriplex halimus schweifurthii sub sp lasts until the ninth day. The first day was low levels of 0 to 16.66%. Seed germination of the species A. halimus sp sub halimus under effect of KCl indicates that high doses of the salts (16, 18%) mark a rate less than 50% the first day, Seed germination diminishes when the concentration reaches 20%.germination Atriplex halimus sub sp schweifurthii is influenced negatively to 18 g / l, the rate is 0% and a low rate of 20% for the treatment of 20 g / l. Seed germination of the species A. halimus sub sp halimus in effect shows that CaCl2 dose of 2 g / l significantly stimulates germination with a rate of 100% on the second day, a delay of one and a 40% rate on the sixth day. Germination Atriplex halimus sub sp schweifurthiiun marks a delay of a day for all treatments. The germination rate is 20% for treatments of 12 and 16 g / l. The chemical analysis of the species A. halimus sub sp.halimus shows very high percentages of dry matter (88.13%) mineral matter (82.8%) (34.81%) crude fiber and a low percentage of organic matter (5.33%) by against the species Atriplex halimus sub sp.schweinfurthii present moderately low values of dry matter (38.73%), crude fiber (35.17%), a low percentage of inorganic material (23.86%) and low percentages e organic matter (14.86%). Chemical analysis, we concluded that the subspecies halimus a much higher nutritional value than the subspecies schweinfurthii. These results show that A. halimus is a significant resource for phylogenetic rehabilitating degraded soils and salty and a way to fill the gap grazing in Algeria.