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Nutrient content of vegetable amaranth (Amaranths cruentus L.) at different harvesting stages.

Abstract: Data on the nutritional content of conventional vegetables can be reasonably associated with a specific stage of plant development, but information about the age of plant development to define harvest maturity for wild or indigenous leafy vegetables including amaranths is scanty. A field experiment was conducted in order to assess the, P, K, Ca, Na, Cu and Zn content at different harvest stages of amaranth. Amaranths were harvested at 3, 4, 5, 6, 7 and 8 weeks after emergence (WAE). A significant difference (P<0.05) was observed in the time these different mineral nutrients reached highest levels. At 3 WAE Ca and Zn, at 4 WAE P, at 6 WAE K and at 7 WAE Na and Cu reached their highest levels. Protein level significantly decreased from 50.8 to 43.47% during the 8 weeks. Regardless of the differences in reaching their highest levels which stretched from 3 to 7 WAE, it was observed that when Ca and Zn reached their highest level at 3 WAE, other minerals despite being low in their concentration could still meet the Daily Required Allowance (DRA) for humans.