Microsprinkler Irrigation of Young `Redblush' Grapefruit Trees Using Reclaimed Water

in HortScience
Authors:
Michael A. MaurerHorticultural Sciences Department, University of Florida, P.O. Box 110690, Gainesville, FL 32611

Search for other papers by Michael A. Maurer in
ASHS
Google Scholar
PubMed
Close
and
Frederick S. DaviesHorticultural Sciences Department, University of Florida, P.O. Box 110690, Gainesville, FL 32611

Search for other papers by Frederick S. Davies in
ASHS
Google Scholar
PubMed
Close

Two field studies conducted from 1990 to 1991 evaluated the effects of reclaimed water on growth and development of 1- and 2-year-old `Redblush' grapefruit (Citrus paradisi Macf.) trees on Swingle citrumelo [Citrus paradisi (L.) Osb. ×Poncirus trifoliata (L.) Raf.] rootstock. Treatments were arranged as a3 (water sources) x 3 (irrigation levels) factorial at two locations on an Arredondo (well drained) and Kanapaha (poorly drained) fine sand near Gainesville, Fla. Irrigation treatments included 1) reclaimed water, 2) reclaimed water plus fertigation, and 3) well water plus fertigation. The reclaimed water was formulated to simulate that of a sewage treatment plant at Vero Beach, Fla. Irrigation was applied at 20% soil moisture depletion, or at 19 or 25 mm·week regardless of rainfall. In both experiments, visual ratings of tree vigor, and measured tree height and trunk diameter, were significantly lower for trees watered with reclaimed water without fertilizer than for the others in both years. Moreover, there was no fourth leaf flush in 1991 with reclaimed water. There was a significant increase in leaf Na, Cl, and B concentrations for the reclaimed water and reclaimed water plus fertigation treatments in 1990; however, in 1991 only leaf B concentrations showed a similar trend. In 1991, there were no significant differences in leaf Cl concentrations. Visual symptoms of N deficiency were observed by the end of the first season in trees grown with reclaimed water. Irrigation levels generallv did not affect tree growth.

  • Collapse
  • Expand

 

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 11 11 3
PDF Downloads 42 42 5