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- Title
Harvest Stubble Height and K Fertilization Affect Performance of Jiggs and 'Tifton 85' Bermudagrasses.
- Authors
Kohmann, Marta M.; Sollenberger, Lynn E.; Vendramini, João M.B.; Silveira, Maria L.; Moreno, Leonardo S. B.
- Abstract
Use of Jiggs bermudagrass [Cynodon dactylon (L.) Pers.] for hay has increased in warm climates like southern Florida, but effects of defoliation and K fertilizer management on Jiggs adaptation to environments with frequent winter freezes are not known. During 2 yr, K fertilization (0, 17 and 34 kg K ha-1 harvest-1) and cutting stubble height (SH, 8 and 16 cm every 28 d) effects on herbage accumulation (HA), ground cover, K removal and tissue and soil K were evaluated for Jiggs and 'Tifton 85' (Cynodon spp.) bermudagrasses. All treatments received 240 kg N ha-1 yr-1. Herbage accumulation was greater for 8- than 16-cm SH (8050 and 7330 kg ha-1 yr-1, respectively) and increased linearly from 7040 to 8120 kg ha-1 yr-1 with increasing K fertilization. Potassium fertilization did not affect grass percentage ground cover, but Jiggs had 17 (2014) and 40% (2015) greater cover than Tifton 85. Increasing K fertilization increased tissue K concentration (15 to 19 g kg-1 in 2014 and 13 to 25 g kg-1 in 2015) and K removal in HA (from 104 to 149 kg ha-1 in 2014 and 88 to 216 kg ha-1 in 2015). During 2 yr, soil-extractable K declined 6 mg kg-1 for the zero K level but increased 6 mg kg-1 when K was applied. In a cooler subtropical region characterized by frequent winter freezes and across a range of K fertilizer and SH levels, Jiggs sustained ground cover better than Tifton 85, but K fertilization did not affect persistence.
- Subjects
BERMUDA grass; EFFECT of potassium fertilizers on plants; PLANT fertilization
- Publication
Crop Science, 2017, Vol 57, Issue 6, p3352
- ISSN
0011-183X
- Publication type
Article
- DOI
10.2135/cropsci2017.05.0308