Concentrations of Mg, Ca, P, K, and Crude Protein in Fertilized Tall Fescue<sup>1</sup>

Reynolds, J. H.; Wall, William H.

doi:10.2134/agronj1982.00021962007400060006x

Cited by 6 publications

(5 citation statements)

References 10 publications

(11 reference statements)

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“…Crude protein, NDF, ADF, and ADL concentrations were similar among E+ and Etall fescue hays ( Table 5). Concentrations of Ca, P, Mg, K, and N a in E+ and Ehays were within the ranges of those previously reported for tall fescue harvested in spring (Powell et al, 1978;Pendlum et al, 1980;Reynolds and Wall, 1982). Similar concentrations of Ca, P, and K were observed in E+ and Ehays, but concentrations of Mg, Na, and S were lower and concentrations of Mn, Zn, and Cu were slightly higher in E+ hay than in Ehay.…”

Section: Aluminosilicate In Fescue Dietssupporting

confidence: 86%

Effects of hydrated sodium calcium aluminosilicate on fescue toxicosis and mineral absorption

Chestnut

Anderson

Cochran

et al. 1992

Journal of Animal Science

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The possibility of supplementing livestock diets with an aluminosilicate to protect them from fescue toxicosis was investigated. An in vitro study showed that hydrated sodium calcium aluminosilicate (HSCAS) removed greater than 90% of the ergotamine from aqueous solutions at pH 7.8 or lower, indicating a high affinity of ergotamine for HSCAS in vitro. Rats fed diets containing tall fescue seed infested (E+) with the endophytic fungus Acremonium coenophialum had lower (P less than .05) feed intakes and weight gains than did rats fed diets containing uninfested (E-) tall fescue seed. When feed intake by rats fed the E- seed diet was limited to that of rats fed the E+ seed diet, weight gains did not differ, but testes weights and serum prolactin (PRL) concentrations were lower (P less than .05 and .10, respectively) in rats receiving E+ seed. Supplementing E+ seed diets with HSCAS did not eliminate effects of E+ seed on intake, PRL, or testes weights. Sheep fed E+ tall fescue hay had higher (P less than .05) rectal temperatures than did sheep fed an equal amount of E- tall fescue hay, but OM and N digestion coefficients did not differ between the two hays. Supplementing E+ hay diets with HSCAS did not eliminate the effect of E+ hay on rectal temperatures. Addition of 2% HSCAS to tall fescue hay diets did not affect apparent absorption by sheep of OM, N, Ca, P, Na, K, or Cu, but it reduced (P less than .05) the apparent absorption of Mg, Mn, and Zn.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Aluminosilicate In Fescue Dietssupporting

confidence: 86%

Effects of hydrated sodium calcium aluminosilicate on fescue toxicosis and mineral absorption

Chestnut

Anderson

Cochran

et al. 1992

Journal of Animal Science

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“…Similar results have been reported previously (Karn et al 1983). However, data reported by Reynolds and Wall (1982) indicated that lower N rates (67 kg N ha'),…”

Section: Water Treatmentsupporting

confidence: 90%

Water, nitrogen and ploidy effects on Russian wildrye mineral concentrations

Karn¹,

Frank²,

Berdahl³

2003

REM

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High quality forage for spring and autumn grazing can be obtained from Russian wildrye [Psathyrostachys juncea (Fisch.) Nevski], a cool-season bunchgrass. However, little is known about mineral concentrations critical to livestock production, especially in the relatively new tetraploid plants. A knowledge of plant mineral concentrations and how they can be manipulated to more nearly meet animal requirements is necessary to optimize animal production. A study was undertaken to determine the extent that concentrations of critical minerals in leaf and stem tissue of Russian wildrye were affected by ploidy level, growing-season water (50 and 150% of average), and N fertilizer (10 and 134 kg N ha 1). Plants were sampled at vegetative, boot, anthesis, and anthesis plus 10-day stages of maturity in 1994, 1995, and 1996. Ploidy level resulted in small but significant differences in some mineral concentrations, with diploid plants usually having higher levels. An exception was P in stem tissue. This finding indicates that in breeding and selection for other traits, forage quality was not adversely affected. Growing-season water level also had minimal effects on mineral concentrations, except for P which was enhanced (P < 0.05) by greater amounts of soil water. Fertilizer N increased forage levels of Ca, K, Cu, and Zn, and decreased levels of P. Higher concentrations of K are not desirable, because they increase the possibility of a grass tetany problem. Advancing plant maturity caused a decrease in P and Zn concentrations, but Ca and Mg in leaf tissue increased as plants matured. These results suggest that concentrations of P, Ca, Mg, and Cu were marginal for high producing cattle at some stages of maturity, but we found the effects of nitrogen and growing-season water did not result in leaf and stem mineral concentration changes that would adversely affect the safety and nutritive quality of Russian wildrye.

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“…Similar results have been reported previously (Karn et al 1983). However, data reported by Reynolds and Wall (1982) indicated that lower N rates (67 kg N ha-'), increased forage Mg and decreased K, while N rates similar to ours increased forage K and had little effect on Mg and Ca. Increasing dietary K levels in ruminants (Greene et al 1983, Wylie et al 1985 results in decreased Mg absorption, exacerbating a potential grass tetany problem.…”

Section: Nitrogen Fertilizersupporting

confidence: 66%