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This article in AJ

  1. Vol. 79 No. 3, p. 423-424
     
    Received: Feb 17, 1986
    Published: May, 1987


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doi:10.2134/agronj1987.00021962007900030002x

Effect of Supplemental Irrigation on the Yield of Coastal Bermudagrass in the Southeastern United States1

  1. G. W. Burton,
  2. J. L. Butler and
  3. R. E. Hellwig2

Abstract

Abstract

The objective of this study was to determine the effect of supplemental irrigation on the yield of Coastal bermudagrass [Cynodon dactylon (L.) Pers.] when fertilized annually with 700 kg/ha of N plus adequate P and K, and usually cut at 24-day intervals. Paired plots, one irrigated to keep soil moisture above 25 MPa, the other not irrigated and replicated six times, received 100 kg/ha of N in mid-March and after the first six cuts in 1966, 1967, and 1968 when respective annual rainfall was 97, 81, and 82% of the 44-yr average, and rainfall for the 210-day test period was 92, 87, and 77% of the 44-yr average. Irrigation significantly increased the yield on only two of the 23 cuts made during the 3-yr test period and failed to increase the total yield in 1966, 1967, or 1968. Three-year respective average annual yields were 13 750 and 13 860 kg/ha for the irrigated and nonirrigated treatments. Irrigation had no effect on protein content or the pelleting properties of the forage produced.

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