Geographical Variation in Nutrient Composition of Lotus tenuis (Waldst.&Kit.) Populations from Seeds Collected from Different Locations

To investigate the effect of seed origin on the nutritive value of narrowleaf birdsfoot trefoil (NBT, Lotus tenuisWaldst.&Kit.), seeds of 86 NBT populations were collected from plants spontaneously occurring in natural pastures andrangelands located at different geographical gradients of the Black Sea Region, Turkey. Some nutrient contents of thesepopulations regrown under the same conditions were determined. Minimum and maximum values with regard to the crudeprotein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), Ca, P, Mg, K and condensed tannin contents,relative feed value, Ca P-1 and K (Ca+Mg)-1 ratios were found as 176.83 and 238.87, 201.00 and 351.61, 307.19 and435.48, 15.01 and 21.60, 2.18 and 3.77, 3.03 and 4.02, 8.43 and 16.69, 20.00 and 31.50 g kg-1 dry matter, 189.70 and263.41, 4.73 and 9.57, 0.35 and 0.88, respectively. The effects of seed genotype from different altitudes (Ca P-1), latitudes(digestible dry matter and ADF) and longitudes (CP and Mg) on some nutrient contents and feed values were foundsignificant (P<0.05). The correlations between altitude and NDF, P and Mg or between latitude and P and Mg contents ofpopulations were significant. There were no specific trends in chemical composition and the nutritive value of tested NBTpopulations due to geographical variation. Thus, the results suggested that all studied geographical populations can beselected to obtain the nutritionally superior forage.

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