Mineral Content in Creeping Bluestem as Affected by Time of Cutting

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Abstract
Florida''s [USA] soils are low in nutrients, which is reflected in the low mineral content of range forages. This investigation was designed to determine the contents of P, K, Ca, Mg, Fe, Mn, Zn and Cu and the Ca: P ratio in creeping bluestem (S. stoloniferum Nash.), a widespread, high-yielding native forage. The grass was cut at 10 and 20-cm heights during 70-day intervals from June-Oct. 1976, Aug.-Dec. 1976, and Oct. 1976-Feb. 1977. Height of cut did not significantly affect mineral contents, but strong seasonal patterns occurred. Based on whole plant samples, the contents of K, Mg, P, Zn and Cu and the Ca: P ratio were inadequate when compared to National Research Council requirements for dry, pregnant cows, but Ca, Fe and Mn may be adequate in the forage.

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