بررسي اثر مراحل فنولوژيكي بر كيفيت علوفه دو گونه هالوفيت Halocnemum strobilaceum و Halostachys caspica در مراتع گميشان

Study of effects of phonological stages on forage quality of two halophyte species of Halocnemum strobilaceum and Halostachys caspica in Gomishan ranges

Determination of forage quality of available species is one of the fundamental factors for the management rangelands. Forage quality affected by location and phonological stages. In this study we investigated forage quality of two halophyte species, Halocnemum strobilaceum and Halostachys caspica in three phonological stages (vegetation growth, flowering and seeding). For this purpose, 10 replications were randomly selected from each phonological stage in Gomishan range. In this experiment crude protein, ADF, metabolizable energy and dry matter digestibility were measured using invitro procedures. Data were analyzed using one way and Duncan tests. Results indicated that in both species forage quality in vegetation growth stage was more than flowering and seeding stages. Comparing forage of two species showed that in Halostachys caspica crude protein (21/5 p.), metabolizable energy (10/21 Mj/kg) and dry matter digestibility (71/86 p.) indices were more than Halocnemum strobilaceum while ADF( 18/06 p.) was low in all stages. These result suggested that forage quality of Halostachys caspica was more than Halocnemum strobilaceum.