AN INFLUENCE OF MICROCLIMATIC FACTORS AND IRRIGATION REGIME ON PRODUCTIVITY OF A BULGARIAN WHEAT VARIETY SADOVO 1
Abstract
Results of twelve-year field agricultural experiments during 1995-1996, 2002, 2004-2012 with a Bulgarian wheat variety Sadovo 1, conducted on a leached meadow-cinnamon soil of the experimental base of the Institute of Soil Science, Agrotechnology and Plant Protection in Southern Bulgaria are presented in this paper. The aim of the research was to assess an influence of meteorological factors and irrigation on water use efficiency of plants and grain yield of a spring soft wheat variety Sadovo 1. In the early years, from 1995 to 2007, experiments on controlled watering when a difference between the temperature of a canopy and the surrounding air (measured with infrared thermometer) reached 1°C was carried out in comparison with the control without irrigation. In 2008 three experiments with irrigation at different temperatures between the canopy and the surrounding air were carried out in comparison with a not irrigated control. In 2009 there were applied variants without irrigation at different growth stages spike development, ear formation and milk ripeness, as well as a variant of optimal irrigation and a control without irrigation. High correlations (>0,7) were shown between wheat yields and the climate factors and between wheat yields and irrigation depths. Single watering during interphase periods "heading" and "milk ripeness" increased the efficiency of water consumption and grain yield. The efficiency of water consumption (from 0.95 to 1.99 kg/m3) by the wheat variety Sadovo 1 was higher in the experiment with watering at the temperature difference of more than +1?C. With increasing the standard deviations of rainfall the efficiency of water consumption by plants and grain yield increased, too. When the standard deviations of the indicators of soil moisture decreased in the irrigation experiments, grain yield increased.
About the Authors
G. Stoimenov
Institute of Soil Science Agrochemistry and Plant Protection"N. Poushkarov"
Bulgaria
Bulgaria
Associate professor PhD eng., Department Soil Physics
V. Petrova
Institute of Soil Science Agrochemistry and Plant Protection"N. Poushkarov"
Bulgaria
Bulgaria
Associate professor PhD, Department Soil Physics
Y. Kirkova
Institute of Soil Science Agrochemistry and Plant Protection"N. Poushkarov"
Bulgaria
Bulgaria
Professor PhD eng., Department Soil Physics
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Review
For citations:
Stoimenov G., Petrova V., Kirkova Y. AN INFLUENCE OF MICROCLIMATIC FACTORS AND IRRIGATION REGIME ON PRODUCTIVITY OF A BULGARIAN WHEAT VARIETY SADOVO 1. Siberian Herald of Agricultural Science. 2016;(6):111-120.
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