Irrigation Level and Nitrogen Rate Affect Evapotranspiration and Quality of Perennial Ryegrass (Lolium perenne)


CANDOĞAN B. N. , BİLGİLİ U., Yazgan S., Acikgoz E.

INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY, vol.17, no.3, pp.431-439, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 3
  • Publication Date: 2015
  • Doi Number: 10.17957/ijab/17.3.14.111
  • Journal Name: INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.431-439
  • Keywords: Cool-season turf grass, Deficit irrigation, Fertilization, Water use, Visual quality, MINIMUM WATER REQUIREMENTS, TALL FESCUE, PHYSIOLOGICAL-RESPONSES, KENTUCKY BLUEGRASS, MOWING HEIGHT, TURF QUALITY, STRESS INDEX, GROWTH, DROUGHT, FREQUENCY
  • Bursa Uludag University Affiliated: Yes

Abstract

This study examined the effects of different irrigation levels and nitrogen rates on perennial ryegrass (Lolium perenne L.) evapotranspiration and quality in a sub-humid climate over a two-year period (2007-2008). Nitrogen treatment (25 kg N ha(-1); N-1 and 50 kg N ha(-1); N-2) varied among main plots and irrigation levels (25%; I-1, 50%; I-2, 75%; I-3, 100%; I-4 and 125%; I-5 of the Class A pan evaporation) by subplot. Irrigation was performed at 3-day intervals during May-September using a pop-up sprinkler irrigation system, and N applied as a monthly rate during the irrigation period. Seasonal turfgrass evapotranspiration was found to vary by treatment from 309-1178 mm in 2007 and from 379-1097 mm in 2008. Turfgrass visual color, quality and clipping yield were shown to decrease significantly with decreases in irrigation water and N fertilizer. The study findings demonstrated that under a non-limiting water supply, irrigation could be decreased by adjusting N fertilizer rates according to turfgrass visual color and quality and that N1I4 or N2I3 treatments can maintain acceptable turfgrass visual color and quality under sub-humid climatic conditions. (C) 2015 Friends Science Publishers