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Original Articles

Texas Bluegrass Responses to Seeding Rate and Fertilization

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Pages 309-319 | Received 05 Dec 2005, Accepted 12 Jun 2006, Published online: 13 Mar 2007
 

ABSTRACT

Texas bluegrass has potential as a cool-season perennial pasture grass for the south-central USA. Slow stand establishment in competitive environments is a limitation. Forage production of this grass increases with nitrogen (N), and rhizome growth increases with phosphorus (P). Stand responses by Texas bluegrass from three seed sources to seeding rate and a complete mixed fertilizer were assessed from 1997 through 2005 on a Louisiana Coastal Plain site. A linear response (R2 = 0.39, P ≤ 0.0001) to seeding rate in March 1998 persisted through 2005, even though stands at all seeding rates improved over time. Stands did not differ (P > 0.05) among seed sources. At only the higher seeding rates, rhizome mass increased with fertilization. Soil pH decreased with fertilization, and pH was positively correlated with the final stand rating in 2005. Direct stand responses to fertilization were not detected. Lack of competitive advantage, despite growth responses, and soil acidification with fertilization indicate that increased seeding rates and delayed fertilization may enhance initial establishment of Texas bluegrass in humid environments.

Notes

1NS = not significant.

2Correlation coefficient with probability value in parenthesis.

3Stand count is percent of observations along a transect with Texas bluegrass present.

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