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The actual consumption of water by selected cultivated and weed species of plants and the actual values of evapotranspiration of the stands as determined under field conditions

Author

Listed:
  • Jan PIVEC

    (Department of Agricultural Ecology and Biometeorology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences in Prague, Prague, Czech Republic)

  • Václav BRANT

    (Department of Agricultural Ecology and Biometeorology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences in Prague, Prague, Czech Republic)

Abstract

In the years 2005 to 2008, the consumption of water by selected cultivated and weed species under the field conditions and the values of the actual evapotranspiration in selected stands of cultivated crops were evaluated. The values of the transpiration flow were measured with a T4.2 EMS Brno (CZ) 12 channel sap-flow meter, and the actual evapotranspiration by BREB method (Bowen Ratio-Energy Balance) using the equipment of the same firm. The recording of the values obtained during the measurements was carried out in 10-min intervals. The sap flow was measured on the following weed plants Amaranthus retroflexus, Artemisia vulgaris, Cirsium arvense, Conyza Canadensis, and Lactuca serriola as weeds in the cultivated crops of Brassica napus and Zea mays. The actual evapotranspiration using the BREB method was determined over the stands of Beta vulgaris, Brassica napus, Hordeum vulgare, Medicago sativa, and Zea mays. On the basis of the measurements carried out, the average daily values of the sap flow of the evaluated plants ranged from 0.016 to 0.193 kg/day of water per plant. The maximum daily values ranged from 0.025 to 0.309 kg/day of water per plant. The average daily value of the evapotranspiration flow in Hordeum vulgare during the period under observation amounted to 2.9 mm, while the daily values ranged from 1.2 to 4.6 mm H2O/day. In the other evaluated plants, the daily values of evapotranspiration ranged from 0.9 mm to 5.9 mm/day of water, on average 3.4 mm/day of water (Beta vulgaris), and from 1.7 mm to 5.2 mm/day of water, on average 3.2 mm/day of water (Brassica napus).

Suggested Citation

  • Jan PIVEC & Václav BRANT, 2009. "The actual consumption of water by selected cultivated and weed species of plants and the actual values of evapotranspiration of the stands as determined under field conditions," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 4(SpecialIs), pages 39-48.
  • Handle: RePEc:caa:jnlswr:v:4:y:2009:i:specialissue2:id:476-swr
    DOI: 10.17221/476-SWR
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    References listed on IDEAS

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    1. Hanson, Blaine R. & May, Donald M., 2006. "Crop coefficients for drip-irrigated processing tomato," Agricultural Water Management, Elsevier, vol. 81(3), pages 381-399, March.
    2. Corbeels, M. & Hofman, G. & Van Cleemput, O., 1998. "Analysis of water use by wheat grown on a cracking clay soil in a semi-arid Mediterranean environment: weather and nitrogen effects," Agricultural Water Management, Elsevier, vol. 38(2), pages 147-167, December.
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