Zmiany wilgotności i temperatury wewnątrz szyszek sosny zwyczajnej (Pinus sylvestris L.) łuszczonych dwuetapowo

Autorzy

• Monika Aniszewska Szkoła Główna Gospodarstwa Wiejskiego, Wydział Leśny, Katedra Maszyn Rolniczych i Leśnych
  ul. Nowoursynowska 164
  02-787 Warszawa, Polska
  Tel. +48 22 5934520, e-mail: monika_aniszewska@sggw.pl

Abstrakt

Temperature measurements were taken: (1) under opening scales, (2) at the seed, and (3) in the stem, of pine cones. Changes in temperature were only examined during the second stage of a two-stage seed extraction process. During this phase a permanent dehydration temperature of 50°C was used, following comparison over a ranges of temperatures, between a lower limit of 35°C and a higher limited of 50°C. The temperature was slowest to increase in the cone’s stem, and fastest to increase under opening scales. The temperature at the seed remained constant at around 43°C for the first hour of dehydration, before increasing to 50°C. The two-stages method of cone extraction employed here, with a permanent dehydration temperature of 50°C in second stage, can be used in extraction cabinets equipped with seed extractors that allow the continuous control of air humidity. The time spent soaking during the inter-stage break should last 5 minutes. Viability of seeds obtained in two-stages process was 78% to 89%.

Słowa kluczowe

• pine cone
• thermocouple
• seed extraction
• scale