Puutuha mõju hariliku kuuse kasvule Ulila ammendatud freesturbaväljal
Laen...
Kuupäev
2023
Kättesaadavus
05.09.2023
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Eestis on ligi 9500 hektarit ammendunud freesturbavälju, mis on tuleohtlikud ning
oluliseks CO2 emissiooni allikaks. Et mõju keskkonnale vähendada, tuleks alad
rekultiveerida. Jääksoode taastamisvõimalusi on mitmeid, kuid üks edukamaid ja
säästlikumaid viise on nende metsastamine. Käesoleva töö eesmärgiks oli uurida puutuha
mõju hariliku kuuse (Picea abies) kasvule ning võrrelda puutuha kogusega 5 t/ha ja 10
t/ha töödeldud katsealadel mõõdetud puude kõrguse ja diameetri andmeid. Eeldati, et
harilik kuusk kasvab paremini suurema puutuha kogusega (10 t/ha) töödeldud katsealal.
Soome katsetulemuste põhjal ei kasva harilik kuusk hästi puutuhaga väetamise järel
jääksoos, kuid meie katsetulemuste andmete põhjal võiks soovitada kuuske kasvatada
turbamuldadel jõulukuuseistandikena. Suuremad muutused toimusid Ulila jääksoo (Tartu
mk) tuhaga töödeldud katsealade vahel kuuskede kõrguse aastases juurdekasvus; katsealal
PT10 oli antud näitaja 1,6 korda suurem katseala PT5 tulemusest. Katsealade PT10 ja PT5
kõrguse aastased juurdekasvud olid tuhaga töötlemata kontrollala tulemusest vastavalt
15,7 ja 11,6 korda suuremad. Puude kasv hoogustus juba mõned aastad peale istutamist
tänu puutuhas sisalduvatele makro- ja mikroelementidele. Tuhaga töötlemata kontrollalale
istutatud kuused olid kuuendaks aastaks välja surnud.
Nearly 9500 hectares of milled peat fields have been exhausted in Estonia, which are flammable and important sources of CO2 emissions. Areas should be recultivated to reduce environmental impacts. There are many ways to restore a residual peatlands, but one of the most successful and economical ways is afforestation. The aim of this work was to investigate the effect of wood ash on the growth of Norway spruce (Picea abies) and to compare the height and diameter data of trees measured in experimental areas treated with the amount of wood ash 5 t/ha and 10 t/ha. It was assumed that Norway spruce grows better in the experimental area treated with a higher amount of wood ash (10 t/ha). Based on Finnish test results, Norway spruce does not grow well in residual bogs after fertilizing with wood ash, but based on our test results, it could be recommended to grow spruce on peat soils as a breeding ground for Christmas trees. Bigger changes occurred in the annual height growth of spruces in the experimental areas of Ulila cut-away peatland (Tartu mk), when in experimental area PT10 this indicator was 1.6 times higher than the result of experimental area PT5. The annual height growth of experimental areas PT10 and PT5 was 15.7 and 11.6 times higher, respectively, than the result of the control area not treated with ash. Tree growth accelerated a few years after planting due to the macroand micronutrients contained in wood ash. Spruce trees planted in the untreated control area were dead by the sixth year.
Nearly 9500 hectares of milled peat fields have been exhausted in Estonia, which are flammable and important sources of CO2 emissions. Areas should be recultivated to reduce environmental impacts. There are many ways to restore a residual peatlands, but one of the most successful and economical ways is afforestation. The aim of this work was to investigate the effect of wood ash on the growth of Norway spruce (Picea abies) and to compare the height and diameter data of trees measured in experimental areas treated with the amount of wood ash 5 t/ha and 10 t/ha. It was assumed that Norway spruce grows better in the experimental area treated with a higher amount of wood ash (10 t/ha). Based on Finnish test results, Norway spruce does not grow well in residual bogs after fertilizing with wood ash, but based on our test results, it could be recommended to grow spruce on peat soils as a breeding ground for Christmas trees. Bigger changes occurred in the annual height growth of spruces in the experimental areas of Ulila cut-away peatland (Tartu mk), when in experimental area PT10 this indicator was 1.6 times higher than the result of experimental area PT5. The annual height growth of experimental areas PT10 and PT5 was 15.7 and 11.6 times higher, respectively, than the result of the control area not treated with ash. Tree growth accelerated a few years after planting due to the macroand micronutrients contained in wood ash. Spruce trees planted in the untreated control area were dead by the sixth year.
Kirjeldus
Bakalaureusetöö
Metsanduse õppekaval
Märksõnad
bakalaureusetööd, puutuhk, jääksoo, Picea abies, kõrgus, diameeter, energiavarustus, alternatiivenergia, Roheline Ülikool (töö toetab EMÜ Rohelise Ülikooli põhimõtteid)