چکیده:
Smirnovia iranica, a native valuable woody species from Fabaceae, is an adaptable plant of central sandy areas of Iran. On other hand, this species could be markedly considered from different view points of forage production, soil conservation and medicinal applications.
The current research was carried out in Band-e-Rig of Kashan, Iran to evaluate Smirnovia iranica properties including crude protein (c.p), NDF, ADF, P, K, ME and DMD in different phonological stages in order to find its forage quality for livestock nutrition. The result of chemicals analysis indicates that there is a significant difference among different phonological stages of S.iranica in terms of its properties. As the plant age is increased, c.p, ME and DMD are decreased while NDF and ADF are increased. This leads to reduction of S.iranica forage quality, since there is not significant difference between flowering and growth stages in view point of their c.p, ME, DMD, NDF and ADF, also according to increase of P and K in flowering stage, it seems that this stage could be considered as favorable time for S.iranica utilization by livestock.
خلاصه ماشینی:
"Current research attempts to determine P, K, crude protein, NDF, ADF, metabolic energy, percentage of digestible dry matter of Smirnovia iranica in different phenologic stages to find the most appropriate time of utilization and nutrient variation.
iranica in different phenologic stages and regions (view the image of this page) 50 45 40 b 35 b 30 20 15 10 5 0 a a b b NDF ADF Vegetative growth Flowering stage Seed ripening growth stage Figure 2: Comparison of ADF and NDF values in three vegetative growth stages ● Potassium: The content of K in different phonologic stages of S.
5 0 Vegetative growth Flowering Seed ripening growth stage Figure 4: Comparison of Phosphorus content in different vegetative growth stages * Percentage of Digestible Dry Matter (DMD): The results of statistical analysis showed that DMD content of plant tissues in different vegetative stages have significant differences.
Generally, comparison of mineral and organic nutrient of the plant shows that crude protein, metabolic energy, percentage of digestible dry matter all are decreased during vegetative growth stage while NDF and ADF are increased.
Torkan (1999) showed that forage quality is decreased during plant growth due to increase of NDF and ADF and decrease of crude protein.
The results of current research indicates that since there are no significant differences among protein content metabolic energy, digestable dry matter, NDF and ADF values in flowering and vegetative growth stages and K and P increases during flowering stage, the most appropriate period for utilization of the species is flowering period."