Tolerance of Bahiagrass (Paspalum notatum Flugge) to Defoliation

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  • PAKIDING Wempie
    Division of Grassland Science, Faculty of Agriculture, Miyazaki University:(Present address)Faculty of Animal Husbandry, Hasanuddin University
  • HIRATA Masahiko
    Division of Grassland Science, Faculty of Agriculture, Miyazaki University

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  • バヒアグラス(Paspalum notatum Flugge)の刈取耐性

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Bahiagrass (Paspalum notatum Flugge) is known to be highly tolerant to defoliation. This study tested defoliation tolerance of bahiagrass in terms of tiller density and lamina production under extremely severe cutting, to determine the limit of the tolerance and obtain some information on the management and utilization of the grass. In Experiment 1, a sward was defoliated every day to remove all laminae in spring-summer seasons. In Experiment 2, swards previously subjected to 2 nitrogen rates (-N and +N) were defoliated every day (D1), every 2 days (D2) or every 4 days (D4) to remove all laminae in summer-autumn seasons. Tiller density apparently started to decline after 4-6 weeks of the defoliation treatments, whereas lamina production started to decline immediately after the initiation of the defoliation treatments. The rates of decrease in tiller density and lamina production were almost always ranked D1≈D2> D4, with little effect of nitrogen rate (-N≈+N). It was shown that bahiagrass well tolerates extremely severe defoliation (removing all laminae every 1-2 days) for 4-6 weeks, almost maintaining initial tiller density and still showing some rates of lamina production.

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