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Effect of Burning Forage production of ‘Coastal’ Bermudgrass at Varying Levels of Fertilization¹

The effect of burning ‘Coastal’ bermudagrass (Cynodon dactylon (L.) Pers.) sod during the winter or early spring was determined at three levels of fertilization over a 3-year period, 1964-1966. Burning increased forage yields 1,140 kg/ha when a high level of fertilization was utilized. Forage yields were not increased by burning at lower levels of fertilization. The beneficial effect of burning was attained each year at the second clipping (July) and was not a result of earlier forage production.

Burning provided more effective early weed control than mowing or herbicide treatments applied April 15. Burning on January 1 was not as effective for weed control as later burning. Burning April 1 provided maximum weed control and left the soil without vegetative cover for a minimum period of time. Soil temperatures on the burned plots averaged 1.7 C higher than those on the unburned plots during April and May. Burning had no significant effect on soil nitrogen content during the 3-year experimental period.

Key Words: weed control • fertilization level • time of burning • soil temperature

² Professor of Agronomy.

Received for publication February 26, 1968.