Morphological Characterization and Chemical Composition of a Variety of Medicago (Triad): A Study in Flowering Stage and In-vivo Digestibility of its Hay

The goal of this study is to precisely forecast biometrical characteristics at the phenological bud stage of the Medicago introduced (Triad) (considered an ideal stage that delivers the greatest nitrogen value), to understand its chemical makeup, and lastly to assess the digestibility of its hay in nearby sheep. Biotic and abiotic stresses are severely limiting plant production and productivity. Of notable importance is salt stress that not only limits plant growth and survival, but affects the soil fertility and threatens agricultural ecosystems sustainability. The problem is exacerbated in fragile arid and semi-arid areas where high evaporation, low precipitation and the use of salty water for irrigation is accelerating soil salinization. Imported sustainable Medicago has a high nutritional content and is utilized as both hay and green feed for ruminants. The chemical makeup of medicago in the budding stage results in a mild ash content, ranging from 6,547 to 7,011% DM. The range of TNM content at this stage's triad is 15,34% MS to 20,75% DM. As for NDF's fiber content, it is 44%. With the exception of DM and MM, the three sections' parameter variance analyses reveal a difference that is very significant (P < 0,0001). The Principal Components Analysis (PCA) shows that diameter of stems is opposing to phosphorus and lignin quantity. The two last parameters have contributed to locate the first section in this axe. Germination density (number of plant /m²), yield in dry and in green and average height of stems locate the second section in the same axis. The DWC of OM and of hay medicago TNM at budding stage is relatively weak for nitrogen, respectively of 69% and 55.5% Different tests on the same fodder according to years and regions of harvest is necessary in order to have weaker and more accurate averages values.