rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Identification of optimum potassium nutrition of greenhouse plants grown in recirculating subirrigation
  name:
    name part: Blessington, Trisha R.
    name part: 1975-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 2002
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    form: remote
    extent: xv, 130 leaves : illustrations ; 28 cm.
  abstract: Recirculating subirrigation has the potential to reduce run-off of water and fertilizers when growing greenhouse plants. Past studies have focused on nitrogen and phosphorous nutrition of plants grown in subirrigation. The overall objective of this research was to determine the optimum potassium nutrition of greenhouse plants grown in recirculating subirrigation. New Guinea impatiens 'Ovation Salmon Pink Swirl' were grown in recirculating subirrigation trays using 0 -12 mM K, with constant 1.5 mM P and 8.0 mM N. Optimum growth was noted at 1.0 - 1.5 mM K, which was half the recommended rate for New Guinea impatiens grown with top water. Growing medium conductivity and K concentration were highest in the top layer extract compared to the middle and bottom layer extracts. Experiment 2 was conducted to test the effects of increased K levels, up to 24 mM K, on different types of greenhouse plants. New Guinea impatiens 'Cameo' and 'Illusion' grew the best at 2 mM K, vinca 'Pacifica Apricot' at 2 - 8 mM K and petunia 'Trailing Wave Misty Lilac' at 4 - 16 mM K. At the upper range of optimum fertilizer levels, salinity damage was not a problem due to "upward leaching" which sequestered the salts in the top layer out of the active root zone. Experiment 3 compared the optimum K fertilizer rates of vinca 'Pacifica Red' grown in recirculating subirrigation and top water. The plants grew the best in subirrigation at 2 mM K and in top water at 4 mM K. Fertilizer salt stratification occurred in the top layer of the growing media of both irrigation techniques, but was most evident in subirrigation. Experiment 3 also focused on the nutrient analysis of these plants. Subirrigated plants were more efficient in accumulating total available K in the most functional plant parts, without leachate loss. In the top watered plants, 50 to 80% of the total available K was lost in the leachate. The nutrient analysis reemphasized that a recirculating subirrigation system is more efficient, due t…
  note: by Trisha R. Blessington.
  note: "Major subject: Horticulture".
  note: Vita.
  note: Also available online.
  note: Issued also on microfiche from Lange Micrographics.
  note: M.S. Texas A&M University 2002
  note: Includes bibliographical references (leaves 123-129).
  subject:
    topic: Major horticulture
  identifier: https://hdl.handle.net/1969.1/ETD-TAMU-2002-THESIS-B53
  related item:
    location:
      url: https://hdl.handle.net/1969.1/ETD-TAMU-2002-THESIS-B53
  record info:
    record content source: TXA
    record creation date: 021209
    record change date: 20220103134532.0
    record identifier: in00001724935