Biostimulant ArGrow mõju kase-, männi- ja kuusetaimede kasvutunnustele
| dc.contributor.advisor | Lutter, Reimo (juhendaja) | |
| dc.contributor.author | Lehemets, Hannes | |
| dc.contributor.department | Metsakasvatuse ja metsaökoloogia õppetool | est |
| dc.date.accessioned | 2025-06-04T10:00:46Z | |
| dc.date.available | 2025-06-04T10:00:46Z | |
| dc.date.defensed | 2025-06-03 | |
| dc.date.issued | 2025 | |
| dc.description | Bakalaureusetöö Metsanduse õppekaval | est |
| dc.description.abstract | Metsade uuendamine istutamise teel on üks olulisemaid tegevusi metsakasvatuses. Kõik uuendamisega seotud metsakasvatuslikud tööd on kulukad ja nõuavad palju ressursse. Uuendamisega kaasnevate kulude, nagu hooldamine ja täiendistutus, vähendamiseks on Põhjamaades kasutusele võetud arginiin-fosfaadil põhinev biostimulant ArGrow. Biostimulant ArGrow parandab puude juurestiku arengut, mis soodustab metsakultuuri kasvukiirust ja ellujäämust. Bakalaureusetöö eesmärgiks oli analüüsida ArGrow biostimulandi mõju männi, kuuse ja kase kasvutunnustele nelja kasvuaasta möödudes peale istutamist. Töös kasutatud andmed on kogutud 2021–2024. aasta sügisel. Välitööde käigus mõõdeti puude kõrgust ja diameetrit, mille põhjal arvutati tüve ruumalaindeks. Lisaks hinnati puude ellujäämust algsest istutustihedusest. Andmed sisestati MS Excelisse ning statistiline analüüs teostati programmis RStudio. Töö tulemustest selgus, et biostimulant avaldas statistiliselt usaldavat mõju kase, kuuse ja männi potitaime kasvutunnustele peale neljandat kasvuaastat. Kahekordne biostimulandi doos suurendas männi potitaimede keskmist kõrgust 16%, diameetrit 21% ja tüve ruumalaindeksit 104% võrreldes kontrollalaga. Kase potitaimede puhul suurendas biostimulant kõrgust 22%, diameetrit 18% ja tüveruumalaindeksit 72%. Kuuse potitaimede vastavad suurenemised olid 14%, 15% ja 61% võrreldes kontrollalaga. Lisaks näitasid varasemate aastate andmed, et biostimulandi mõju kasvutunnustele on aja jooksul kasvanud. Biostimulandil puudus mõju paljasjuurse kase pott-põld taime kasvutunnustele ja kõikide taimetüüpide ellujäämusele. | est |
| dc.description.abstract | Forest regeneration through planting is one of the most important activities in silviculture. All silvicultural treatments related to regeneration are costly and require significant resources. To reduce regeneration-related expenses such as tending and replanting, the Nordic countries have adopted the use of the biostimulant ArGrow, which is based on arginine phosphate. The biostimulant ArGrow enhances the development of tree root system, thereby promoting the growth rate and survival of planted seedlings. The aim of this bachelor’s thesis was to analyze the effect of the ArGrow biostimulant on the growth characteristics of pine, spruce, and birch four growing seasons after planting. The data used in this study were collected in the end of the growing season of 2021–2024. During fieldwork, tree height and diameter were measured, and stem volume index was calculated. Additionally, tree survival was assessed based on the initial planting density. Data were entered into MS Excel and statistical analysis was conducted using RStudio. The results of the study showed that the biostimulant had a statistically significant effect on the growth characteristics of container-grown birch, spruce, and pine after the fourth growing season. A double dose of the biostimulant increased the average height of container-grown pine seedlings by 16%, diameter by 21%, and stem volume index by 104% compared to the control site. In the case of container-grown birch seedlings, the biostimulant increased height by 22%, diameter by 18%, and stem volume index by 72%. The corresponding increases for container-grown spruce seedlings were 14%, 15%, and 61% compared to the control site. Furthermore, data from previous years indicated that the effect of the biostimulant on growth characteristics has increased over time. The biostimulant had no effect on the growth characteristics of bare-root birch plug-field seedlings or on the survival rate of any seedling type. | eng |
| dc.identifier.uri | http://hdl.handle.net/10492/9983 | |
| dc.publisher | Eesti Maaülikool | |
| dc.rights | info:eu-repo/semantics/openAccess | eng |
| dc.rights | Attribution 4.0 International (CC BY NC ND 4.0) | eng |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | bakalaureusetööd | est |
| dc.subject | biostimulant | est |
| dc.subject | ArGrow | |
| dc.subject | kask | est |
| dc.subject | mänd | est |
| dc.subject | kuusk | est |
| dc.title | Biostimulant ArGrow mõju kase-, männi- ja kuusetaimede kasvutunnustele | est |
| dc.title.alternative | Effect of biostimulant ArGrow on growth characteristics of birch, pine and spruce plants | eng |
| dc.type | Bachelor Thesis | eng |
| rioxxterms.freetoread.startdate | 03.09.2025 |