The effect of nitrogen fertilization and age of regrowth on the chemical composition of Coast Cross No. 1 Bermuda grass (Cynodon dactylon)

Herrera, R.; Ramos, N.

Proceedings of the 13th International Grassland Congress Sectional Papers, Section 7: 199-207


Accession: 001005743

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During the dry season, Bermuda grass cv. Coast Cross 1 was sprinkler irrigated, given 0, 50 or 100 kg N/ha and allowed to regrow after cutting for 1-12 wk. The regression of CP content on regrowth period varied with rate of N. Total soluble carbohydrate content tended to increase with age up to the 8th wk of regrowth then decrease, and up to 7 wk was highest without applied N and thereafter was highest with N. Lignin content increased with increasing age of regrowth and was not significantly affected by N. Cellulose content increased with increasing age and was higher with 50 kg than with 100 kg N/ha. In vitro DM digestibility was highest after regrowth for 4 wk and was highest with 100 kg N but was similar with 0 or 50 kg. After the 8th wk digestibility decreased rapidly. It was suggested that good quality pastures could be maintained by application of 100 kg N/ha every 12 wk and cutting after 5-6 wk.