Reza Yari; Moslem Rostampour; Seyedeh Mahbubeh Mirmiran
Abstract
Estimating the nutritional value of forage is one of the main aspects of livestock management in rangelands. Since medicinal plants have a major contribution to the composition of rangeland vegetation, this research was conducted to determine the nutritional value of nine species of medicinal plants ...
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Estimating the nutritional value of forage is one of the main aspects of livestock management in rangelands. Since medicinal plants have a major contribution to the composition of rangeland vegetation, this research was conducted to determine the nutritional value of nine species of medicinal plants in the two stages of vegetative growth and flower in the rangelands of southern Khorasan province . samples were collected and drying , the percentage of crude protein, acid detergent fiber , neutral detergent fiber , dry matter digestibility and metabolizable energy were determined. To statistically analyze the data, a factorial experiment in the form of a completely random design with two factors: species in 9 levels and stage in 2 levels (vegetation and flowering) was used. Two-way analysis of variance (ANOVA) was used. The results showed that all studied traits were affected by the interaction of plant species and phenological stage. Increasing the length of growth from the vegetative stage to flowering in most species caused a decrease in crude protein, percentage of dry matter digestibility and metabolizable energy, and an increase in the percentage of acid detergent fiber . The highest amount of crude protein and digestibility of dry matter was observed in Ru.scutatus species at the vegetative stage. In this investigation, the amount of protein, digestibility and metabolic energy were observed in amounts above the critical limit in the vegetative stage and in Thymus kotschyanus, Rumex scutatus and Ferula haussknechtii species. Therefore, the end of the growing season with the reduction of essential oil in these species can be considered as the right time for livestock grazing in these species.
Hamidreza Naseri; Nateq Lashkari sanami; Seyed Ali Sadeghi Sangdehi
Abstract
In order to provide animal’s nutritional requirements and production of animal protein, it is necessary to adjust the balanced diet and the correct nutrition plan., which is based on proper understanding of food and this is possible through the analysis of nutrients. This research aimed to study ...
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In order to provide animal’s nutritional requirements and production of animal protein, it is necessary to adjust the balanced diet and the correct nutrition plan., which is based on proper understanding of food and this is possible through the analysis of nutrients. This research aimed to study and compare of forage quality in seven species that are grazing by camel including: Nitraria schoberi , Smirnovia iranica , Seidlitzia rosmarinous , Stipagrostis plumosa, Astragalus squarrosus, Alhaji persarum and Zygophyllum eichwaldii conducted in two stages of vegetative growth at Maranjab desert rangelands. For this purpose, the indices of dry matter (DM), Crude Protein (CP), Dry Matter Digestibility (DMD), Acid Detergent Fiber (ADF), Metabolic Energy (ME), Nitrogen (N), Phosphorus (P), Potassium (K) and Sodium (Na) were subjected to chemical analysis. The results showed that the forage quality indices between the species and phonological stages were significantly different (P<0.01). In all species, as the growth stages and plant maturity progressed, the amount of crude protein, metabolic energy and phosphorus were decreased and the amount of dry matter and ADF were increased. While N. shoberi had the highest amount of crude protein (26.51) in vegetative growth stage, S. rosmarinous showed the lowest protein (3.91) at seeding stage. In addition to, with regard to both phonological stages, while the highest dry matter digestibility, metabolic energy, potassium and sodium were found in S. rosmarinous species, the highest amount of crude protein, nitrogen and phosphorus was observed in S. iranica species.
