| Autor: |
LEUGNER, JAN, MARTINCOVÁ, JARMILA, ERBANOVÁ, EVELÍNA |
| Předmět: |
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| Zdroj: |
Reports of Forestry Research / Zprávy Lesnického Výzkumu; 2019, Vol. 64 Issue 1, p10-15, 6p |
| Abstrakt: |
In order to determine the possible disturbance of the planting material by incorrect manipulation, the method of plant moisture stress (PMS) assessment was used. Two-year-old Scots pine (Pinus sylvestris L) seedlings collected on two different dates in two forest nurseries were used. Seedlings were exposed to controlled drying - loosely distributed on the shelves in the laboratory with exposed roots for 2, 4 and 6 hours. For fresh and exposed seedlings the plant water stress PMS was measured by the pressure chamber and the water content in the above-ground parts and roots gravimetrically as the differences between fresh weight and dry matter. Other seedlings of the same treatments were planted in outdoor conditions. Naked roots lost water 2 to 3 times faster than shoots. During drying significantly increased water stress PMS (3-7 bars in unexposed, more than 13 bars aft er 2 hours and 18.5 to nearly 30 bars aft er 4 and 6 hours of exposure). PMS significantly correlated with water content in roots and shoots. The high PMS values also corresponded to high mortality (no loss in unexposed seedlings, 25-55% aft er 2 hours and more than 80% aft er 4 and 6 hours of drying). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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