Knin

Javor negundovac (Acer negundo L.) je listopadno drvo iz Sjeverne Amerike, a u Hrvatsku je uvezen početkom 20. stoljeća. Cijenjen je u pčelarstvu, šumarstvu, krajobraznom uređenju te je vrlo invazivna vrsta. Od ukrasnih karakteristika vrste mogu se izdvojiti deblo, kora, habitus, grane, listovi, cvjetovi i plodovi. Zbog svoje velike prilagodljivosti podnosi vrlo siromašna tla te položaje koji su izloženi suncu, suši, hladnoći i sjeni. Najrasprostranjeniji je u kontinentalnom i submediteranskom dijelu Hrvatske. A. negundo se s vremenom dosta raširio tako da je na području Hrvatske svrstan u invazivnu alohtonu vrstu. Prema literaturnim izvorima navedena vrsta za sada ne pričinjava ozbiljnije štete autohtonoj vegetaciji. Negundovac (Acer negundo L.) slabo je zastupljena dendrološka vrsta na gradskim krajobraznimpovršinama Knina, kao soliter, u drvoredu ili u skupinama. Metodom promatranja je također uočeno da u pogledu održavanja i njege stabala A. negundo na krajobraznim površinama nužno posvetiti više pažnje u formiranju krošnje. Nisu uočena njegova stabla van gradskih krajobraznih površina. Anketno istraživanje je provedeno tijekom druge polovice 2017. godine na uzorku od 50 ispitanika s područja grada Knina i okolice. Temeljem anketnog istraživanja ispitanici su dodijelili vrlo dobre ocijene ukrasnim karakteristikama i ugodnosti prisustva A. negundo na krajobraznim površinama Knina. Ponešto su lošije ocijenili ulogu navede vrste u pčelarstvu, šumskim melioracijama i urbanom šumarstvu. Veći broj ispitanika ne zna da je A. negundo vrlo invazivna vrsta. Ash-leaf maple or boxelder (Acer negundo L.) is a deciduous tree that originates from North America. It was imported into Croatia at the beginning of the 20th century. It is highly valued in bee-keeping, forestry and landscape architecture and it is a highly invasive species. Amongst the ornamental characteristics it is important to highlight its tree trunk, tree bark, habitus, branches, leaves, flowers and fruits. Due to its high adaptability it tolerates very poor soils and positions exposed to the sunlight, drought, cold and shade. It is the most widespread in the continental and sub-Mediterranean parts of Croatia. In time A. negundo became considerably widespread and hence, it was considered as an invasive alien species in Croatia. According to the references provided from professional literature, the previously mentioned tree species does not currently do any serious damage to the autochthonous vegetation. Ash-leaf maple (Acer negundo L.) is a sparsely distributed woody species in urban landscape surfaces of Knin, as a solitary tree, in tree lines or in groups of trees. Moreover, using the observation method concerning maintenance and care of A. negundo on landscape surfaces, it was noted that more attention needs to be paid to the formation of the tree top. These trees have not been found outside the urban landscapes. The survey research was conducted in the second half of 2017 on a sample comprising of 50 respondents originating from the city of Knin and its outskirts. Based on the findings of the survey research the respondents gave very good grades to ornamental characteristics and the comfort of the presence of A. negundo on the landscape surfaces of Knin. The role of the previously mentioned tree species received slightly lower grades in bee-keeping, forest meliorations and urban forestry. A considerable number of those surveyed was unaware of the fact that A. negundo is a highly invasive tree species.