Water use in a greenhouse in a semi-arid climate

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Greenhouse crop production in semi-arid climates is desirable because high solar radiation levels are consistent year round. The use of evaporative cooling will further increase yields and crop consistency. However, these regions typically receive less than 500 mm of rain annually, making water use management a critical concern. This study evaluated water use for irrigation (WU I) and pad-and-fan (WU PF) evaporative cooling systems in a single-span, polyethylene-covered greenhouse in Tucson, Arizona, from March to October 2006. A single-use, non-recirculating irrigation system delivered water to hydroponically grown tomatoes. The pad-and-fan system was computer controlled to maintain day/night air temperatures of 24°C/18°C. The total eight-month WU I and WU PF were 780 and 1450 L m -2, respectively. WU I increased steadily from 4.3 L m -2 d -1 during crop establishment to 7.2 L m -2 d -1 when the plants were mature. WU PF increased from 1.1 L m -2 d -1 during early spring to a peak of 11 L m -2 d -1 during the hottest, driest outside conditions. The water use efficiency (WUE, kg yield per m 3 water use) of the irrigation and pad-and-fan cooling systems was 30 and 16 kg m -3, respectively. When WUE was calculated by combining WU I and WU PF, the total greenhouse WUE was 11 kg m -3. Theoretically, using a 100% recirculating irrigation system could have produced a greenhouse WUE of 13 kg m -3. This study demonstrates that although greenhouses achieve high annual yields with low irrigation rates, using an evaporative cooling system reduces greenhouse WUE to field WUE levels. To minimize greenhouse water use while maintaining high crop yields, this study recommends further examination of the use of recirculating irrigation systems, variable-speed fans to improve climate control, alternative cooling systems, and drought-tolerant crops.

Original languageEnglish (US)
Pages (from-to)1069-1077
Number of pages9
JournalTransactions of the ASABE
Volume54
Issue number3
StatePublished - May 2011

Fingerprint

Greenhouses
semiarid zones
water use efficiency
Climate
Irrigation
fans (equipment)
water use
Fans
greenhouses
cooling systems
irrigation
Water
climate
Crops
cooling
irrigation system
water
irrigation systems
Evaporative cooling systems
crop

Keywords

  • Controlled environment
  • Evaporative cooling
  • Hydroponics
  • Irrigation
  • Pad-and-fan
  • Tomato production
  • Water use efficiency

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Biomedical Engineering
  • Food Science
  • Forestry
  • Soil Science

Cite this

Water use in a greenhouse in a semi-arid climate. / Sabeh, N. C.; Giacomelli, Gene A; Kubota, Chieri.

In: Transactions of the ASABE, Vol. 54, No. 3, 05.2011, p. 1069-1077.

Research output: Contribution to journalArticle

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title = "Water use in a greenhouse in a semi-arid climate",
abstract = "Greenhouse crop production in semi-arid climates is desirable because high solar radiation levels are consistent year round. The use of evaporative cooling will further increase yields and crop consistency. However, these regions typically receive less than 500 mm of rain annually, making water use management a critical concern. This study evaluated water use for irrigation (WU I) and pad-and-fan (WU PF) evaporative cooling systems in a single-span, polyethylene-covered greenhouse in Tucson, Arizona, from March to October 2006. A single-use, non-recirculating irrigation system delivered water to hydroponically grown tomatoes. The pad-and-fan system was computer controlled to maintain day/night air temperatures of 24°C/18°C. The total eight-month WU I and WU PF were 780 and 1450 L m -2, respectively. WU I increased steadily from 4.3 L m -2 d -1 during crop establishment to 7.2 L m -2 d -1 when the plants were mature. WU PF increased from 1.1 L m -2 d -1 during early spring to a peak of 11 L m -2 d -1 during the hottest, driest outside conditions. The water use efficiency (WUE, kg yield per m 3 water use) of the irrigation and pad-and-fan cooling systems was 30 and 16 kg m -3, respectively. When WUE was calculated by combining WU I and WU PF, the total greenhouse WUE was 11 kg m -3. Theoretically, using a 100{\%} recirculating irrigation system could have produced a greenhouse WUE of 13 kg m -3. This study demonstrates that although greenhouses achieve high annual yields with low irrigation rates, using an evaporative cooling system reduces greenhouse WUE to field WUE levels. To minimize greenhouse water use while maintaining high crop yields, this study recommends further examination of the use of recirculating irrigation systems, variable-speed fans to improve climate control, alternative cooling systems, and drought-tolerant crops.",
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AU - Kubota, Chieri

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N2 - Greenhouse crop production in semi-arid climates is desirable because high solar radiation levels are consistent year round. The use of evaporative cooling will further increase yields and crop consistency. However, these regions typically receive less than 500 mm of rain annually, making water use management a critical concern. This study evaluated water use for irrigation (WU I) and pad-and-fan (WU PF) evaporative cooling systems in a single-span, polyethylene-covered greenhouse in Tucson, Arizona, from March to October 2006. A single-use, non-recirculating irrigation system delivered water to hydroponically grown tomatoes. The pad-and-fan system was computer controlled to maintain day/night air temperatures of 24°C/18°C. The total eight-month WU I and WU PF were 780 and 1450 L m -2, respectively. WU I increased steadily from 4.3 L m -2 d -1 during crop establishment to 7.2 L m -2 d -1 when the plants were mature. WU PF increased from 1.1 L m -2 d -1 during early spring to a peak of 11 L m -2 d -1 during the hottest, driest outside conditions. The water use efficiency (WUE, kg yield per m 3 water use) of the irrigation and pad-and-fan cooling systems was 30 and 16 kg m -3, respectively. When WUE was calculated by combining WU I and WU PF, the total greenhouse WUE was 11 kg m -3. Theoretically, using a 100% recirculating irrigation system could have produced a greenhouse WUE of 13 kg m -3. This study demonstrates that although greenhouses achieve high annual yields with low irrigation rates, using an evaporative cooling system reduces greenhouse WUE to field WUE levels. To minimize greenhouse water use while maintaining high crop yields, this study recommends further examination of the use of recirculating irrigation systems, variable-speed fans to improve climate control, alternative cooling systems, and drought-tolerant crops.

AB - Greenhouse crop production in semi-arid climates is desirable because high solar radiation levels are consistent year round. The use of evaporative cooling will further increase yields and crop consistency. However, these regions typically receive less than 500 mm of rain annually, making water use management a critical concern. This study evaluated water use for irrigation (WU I) and pad-and-fan (WU PF) evaporative cooling systems in a single-span, polyethylene-covered greenhouse in Tucson, Arizona, from March to October 2006. A single-use, non-recirculating irrigation system delivered water to hydroponically grown tomatoes. The pad-and-fan system was computer controlled to maintain day/night air temperatures of 24°C/18°C. The total eight-month WU I and WU PF were 780 and 1450 L m -2, respectively. WU I increased steadily from 4.3 L m -2 d -1 during crop establishment to 7.2 L m -2 d -1 when the plants were mature. WU PF increased from 1.1 L m -2 d -1 during early spring to a peak of 11 L m -2 d -1 during the hottest, driest outside conditions. The water use efficiency (WUE, kg yield per m 3 water use) of the irrigation and pad-and-fan cooling systems was 30 and 16 kg m -3, respectively. When WUE was calculated by combining WU I and WU PF, the total greenhouse WUE was 11 kg m -3. Theoretically, using a 100% recirculating irrigation system could have produced a greenhouse WUE of 13 kg m -3. This study demonstrates that although greenhouses achieve high annual yields with low irrigation rates, using an evaporative cooling system reduces greenhouse WUE to field WUE levels. To minimize greenhouse water use while maintaining high crop yields, this study recommends further examination of the use of recirculating irrigation systems, variable-speed fans to improve climate control, alternative cooling systems, and drought-tolerant crops.

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KW - Pad-and-fan

KW - Tomato production

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