Summer Defoliation and Autumn-Winter Production of Phalaris Species and Tall Fescue Varieties1
- R. F. Berry and
- C. S. Hoveland2
The effect of summer defoliation on autumn-winter (October—February) growth of koleagrass, hardinggrass, ‘Ky 31’ and ‘Goar’ tall fescue was studied for two years. Clipping in June and July reduced the autumn-winter forage yield of harding 55% and kolea 47% as compared with that of plots unclipped from May to September. Percent total available carbohydrates (TAC) in July was positively correlated with autumn-winter production of both Phalaris species. Kolea was more summer dormant than harding.
Clipping in mid-July reduced autumn-winter growth of Ky 31 but had no effect on Goar tall fescue. Clipping in early June sharply reduced autumn-winter production of Goar but did not affect Ky 31. Summer clipping reduced the percent TAC in early September for Goar and TAC was correlated with autumn-winter growth. TAC and autumn-winter growth of Ky 31 were not correlated.
Summer resting of these Phalaris species and tall fescue varieties appears necessary for maximum autumn-winter production in the lower southeastern United States.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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