Comparative yield and Nutrient concentration of six cultivars of Tef [ERAGROSTIS TEF (ZUCC.) TROTTER]
2002
Vohwinkel,F.;Piepho,H.P.; Heiligtag,B. and Richter,C.(Researchers)
In Mitscherlich pot experiments, six tef [Eragrositis tef (Zucc.) Trotter] varieties from Ethiopia (DZ-Cr-37, DZ-01-1445, Local Brown, DZ-01-787, Local white, and DZ-01-354) were grown from seed until maturity to examine their nutrient uptake and translocation. While DZ-Cr-37 was the variety with the highest grain yield (in spite of the shortest vegetation period), but with the lowest protein concentration, DZ-01-787 had the lowest yield (of grains as well as of straw), but the highest protein concentration. The protein yield was highest for DZ-Cr-37. This variety (DZ-Cr-37) showed the highest P-efficiency, too (its P concentration in the grains [4.66 g P.kg DM] was much higher than that of all other varieties). The reason for this high P efficiency of DZ-Cr-37 is not known up to now. Concerning the Ca concentration of tef there were no varietal differences, but, it was very high (1.93-2.19 g Ca Kg DM-1) compared to other cereals. Tef grains of all varieties, compared to other cereals, contained a lot of iron (109-140 mg Fe Kg DM-1). This high iron content was not due to contamination during the threshing process, but the result of a high iron uptake and translocation within the tef plant. There was not more iron in brown-seeded tef than in white-seeded. K, Na, Mg, Mn, Cu and Zn concentrations showed no varietal differences, and their concentrations in tef were not different compaired to those of other cereals.
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