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Responses of Glasshouse Grown Cotton to Irrigation with Carbon Dioxide‐Saturated Water
Author(s) -
Mauney J. R.,
Hendrix D. L.
Publication year - 1988
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1988.0011183x002800050023x
Subject(s) - photosynthesis , lint , irrigation , carbon dioxide , agronomy , biology , greenhouse , chlorophyll , horticulture , botany , ecology
Experiments were conducted to test the suitability of using irrigation water as a carrier for CO 2 to enhance growth and productivity of cotton ( Gossypium hirsutum L.). Potted plants (‘DPL 61’) were irrigated daily with CO 2 ‐saturated water in a greenhouse in Phoenix, AZ. Growth, productivity, and physiological responses of these plants were compared to those irrigated with deionized water. All plants were fertilized twice weekly with a modified Hoagland's solution. Yield as measured by boll load at maturity was increased 70 and 53% in two sets of experiments. Carbon dioxide exchange rate (CER) was increased 38%. Leaf chlorophyll content and starch content were also increased. None of the carbon in lint samples was derived from the CO 2 in the irrigation water. Leaf Zn and Mn were deficient in the control plants but were sufficient in the plants watered with CO 2 ‐saturated water. The CO 2 ‐saturated irrigation water increased uptake of Zn and Mn, which supported a more robust photosynthetic apparatus in the treated compared to the control plants. The greater photosynthetic activity during boll loading resulted in a significant increase in yield of the treated plants.