Comparison of the optical properties of the fruit tree stems: the sweet cherry, cherry, pear, common plum and walnut trees

摘要: The studies conducted in the 400 – 700 nm range of wavelength showed that, studied fruit trees, reflectance irradiation from stems was similar and equaled 9 15% falling irradiation. Together with age absorbance increased, but transmittance through cork to chlorophyll layer bark decreased. Spectral research that increasing wavelength, there a decrease an increase cork. In PAR range, current-year pear trees 26%, cherry walnut 20%, sweet common plum 14%. 3-year-old about 15%, 10%, walnut, 6 %. 500 Jan Pilarski, Krzysztof Tokarz 90 5% 2% 1% cherry, cherry. older stems, decreased 1.6 %, other species below 1%. 600 51% pear, 40% 30% plum, 10% lowest only 6%.