Impact of pre-sowing treatment and sowing season on Douglas fir emergence rate in a specific seed lot

Antonín Martiník, Eva Palátová, Kateřina Houšková
2013 Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis  
MARTINÍK ANTONÍN, PALÁTOVÁ EVA, HOUŠKOVÁ KATEŘINA: Impact of pre-sowing treatment and sowing season on Douglas fi r emergence rate in a specifi c seed lot. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2013, LXI, No. 1, pp. 147-155 Not only in the Czech Republic there is a problem with low yield of Douglas fi r seedlings in forest tree nurseries. It can be caused mainly by two factors: the type of pre-sowing treatment and the temperature at the time of sowing. The aim
more » ... of sowing. The aim of this study is to fi nd out their infl uence on the emergence rate of Douglas fi r. We have tested one specifi c seed lot originated from the Czech Republic subject to the following variants of pre-sowing treatment: soaking for 48 hours, stratifi cation without a medium for 21 days and for 30 days a er 48 hours of soaking and stratifi cation for 30 days with a medium. The treated seeds were sown in a phytotron at temperatures of 13/8 °C -10/14 hours (day/night) (simulation of early sowing season in February or March) and at temperatures of 17/13 °C -14/10 hours (simulation of late sowing season in May). In case of the early sowing season, approximately half of the germinable seeds emerged in all treatment variants including the control variant (seeds without stratifi cation). The late sowing season resulted in diff erent emergence rate of the seeds that were subject to diff erent variants of pre-sowing treatment (24-51 %). Then, 21day and 30day stratifi cation were not suffi cient for the tested conditions of the early and late sowing season. None of the combinations of pre-sowing treatment and sowing time resulted in full use of the seed potential of the tested seed lot. Douglas fi r, germination capacity, yield of seedlings Address
doi:10.11118/actaun201361010147 fatcat:47cysut4czadnprs4sc4ycrm3u