scholarly journals RIPARIAN AND SWAMP FORESTS AND SCRUB OF THE PINÉ PLATEAU (TRENTINO, NORTHERN ITALY)

2021 ◽  
Vol 55 ◽  
pp. 97-108
Author(s):  
Franco PEDROTTI
Keyword(s):  
Floristic Composition ◽  
Alnus Glutinosa ◽  
Northern Italy ◽  
Alnus Incana ◽  
Central Alps ◽  
Black Alder ◽  
Salix Cinerea ◽  
Vegetation Series

The riparian and swamp forests/scrub of black alder (Alnus glutinosa), white alder (Alnus incana), grey willow (Salix cinerea) and bay willow (S. pentandra) of the Piné Plateau (Trentino, central Alps) are described here in terms of their floristic composition. They are assigned to the following associations: Filipendulo vulgarisAlnetum glutinosae, Stellario nemorum-Alnetum glutinosae, Carici elongatae-Alnetum glutinosae, Carici elataeAlnetum glutinosae, Frangulo-Salicetum cinereae and Salicetum pentandro-cinereae. In addition, information regarding the distribution of the previous woody communities in the Trentino-Alto Adige Region and their corresponding vegetation series and geosigmeta are provided.

scholarly journals Carbon and Macronutrient Budgets in an Alder Plantation Grown on a Reclaimed Combustion Waste Landfill

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 430 ◽  
Author(s):  
Bartłomiej Woś ◽  
Agnieszka Józefowska ◽  
Marek Pająk ◽  
Marcin Chodak ◽  
Jan Frouz ◽  
...  
Keyword(s):  
Nitrogen Deficiency ◽  
Significant Proportion ◽  
Alnus Glutinosa ◽  
Available Phosphorus ◽  
Alnus Incana ◽  
Tree Biomass ◽  
Black Alder ◽  
Waste Landfill ◽  
Nutrient Stocks ◽  
Total Tree

Combustion waste landfills are unfavorable for revegetation due to nitrogen deficiency, and therefore, the introduction of nitrogen-fixing organisms, such as alder species (Alnus sp.), may be promising for reclamation and restoration of these sites. We investigated the carbon and macronutrient stocks in the combustion waste technosols and biomass of black alder (Alnus glutinosa) and grey alder (Alnus incana) 10 years after introduction onto a combustion waste landfill. The alder species were planted with or without lignite addition in planting holes, the latter acting as control plots. Black alder biomass was higher than that of grey alder. The total macronutrient stocks were higher in the uppermost technosol layer (0–30 cm) than in the biomass nutrient stocks. However, the K and P stocks in the black alder biomass were still greater than the exchangeable K+ and available phosphorus (Pav) stocks in technosols. This is important for the nutrition of the trees planted in combustion waste landfills and confirms the Pav deficit in investigated technosols. The differentiation of nutrients in biomass shows that the largest stock was found in the wood of trunks and branches (40–70% of the stock of individual biomass macronutrients). Although foliage biomass represented approximately 7% of the total tree biomass, the nutrient stocks therein represented a significant proportion of total nutrient stocks: approximately 27–29% nitrogen, 17–22% calcium, 28% magnesium, 7–10% potassium and 12–16% phosphorus. This is particularly important in the context of the turnover of nutrients from litterfall and soil organic matter and the circulation of nutrients in the ecosystem developed on combustion waste technosols.

scholarly journals Significance of diarylheptanoids for chemotaxonomical distinguishing between Alnus glutinosa and Alnus incana

Holzforschung ◽  
2017 ◽  
Vol 72 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Vera Vidaković ◽  
Miroslav Novaković ◽  
Zorica Popović ◽  
Milan Janković ◽  
Rada Matić ◽  
...  
Keyword(s):  
Natural Populations ◽  
Principal Component ◽  
Alnus Glutinosa ◽  
Alnus Incana ◽  
Hybrid Species ◽  
Black Alder ◽  
Liquid Chromatography Tandem Mass ◽  
Group Population ◽  
Chemotaxonomic Markers ◽  
Hybrid Group

AbstractDiarylheptanoids are a group of secondary metabolites widely distributed in the Betulaceae family and characteristic forAlnusspecies. In this study, the chemotaxonomic power of diarylheptanoids, such as hirsutanonol-5-O-β-d-glucopyranoside, rubranoside A, oregonin, platyphylloside, alnuside A and hirsutanonol, has been investigated in combination with principal component analysis (PCA) for differentiation ofAlnusspecies. Concentrations of six diarylheptanoids in the bark extracts of two natural populations ofAlnus glutinosa(black alder) andAlnus incana(gray alder) were determined by ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). PCA clearly shows the separation of three groups. Populations I (A. glutinosa) and II (A. incana) both consisted of individuals of the corresponding species. Four individuals from both sampled populations formed a separate group (population III), which possibly represents a hybrid group. Accordingly, diarylheptanoids may serve in combination with PCA as chemotaxonomic markers at the species level, which may also reveal hybrid species.

scholarly journals Glossiness Evaluation of Coated Wood Surfaces as Function of Varnish Type and Exposure to Different Conditions

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 558
Author(s):  
Emilia-Adela Salca ◽  
Tomasz Krystofiak ◽  
Barbara Lis ◽  
Salim Hiziroglu
Keyword(s):  
Artificial Aging ◽  
Chemical Resistance ◽  
Heat Exposure ◽  
Value Added ◽  
Alnus Glutinosa ◽  
Practical Applications ◽  
Black Alder ◽  
Structural Differences ◽  
Wood Surfaces ◽  
Water Borne

The objective of this study was to evaluate the glossiness of black alder wood (Alnus glutinosa L.) samples coated with two varnish types as a function of exposure to dry heat and artificial aging. The chemical resistance of the coated samples to cold liquids was also evaluated. Based on the findings in this work, it appears that the varnish types and their structural differences influenced the overall glossiness of the coated samples. The UV varnish exhibited higher gloss values than those coated with the water-borne product within the range of silky gloss and silky matte grades. The heat exposure influenced the surface glossiness of the UV-coated samples more than the samples coated with water-borne varnish. The overall gloss values of the samples decreased with the exposure time to artificial aging, resulting in no layer cracks. The cold household liquids left less visible traces on the surfaces and alcohol was found to be the strongest agent. This study could have practical applications in the furniture industry to produce value-added furniture units according to their specific conditions of indoor use.

scholarly journals Response of black alder (Alnus glutinosa (L.) Gaertn.) to selective thinning of various intensities

2020 ◽  
Vol 144 (7-8) ◽  
pp. 378-378
Author(s):  
Simon Lendvai ◽  
Jurij Diaci ◽  
Dušan Roženbergar
Keyword(s):  
Alnus Glutinosa ◽  
Black Alder

Područje poplavnih šuma crne johe (Alnus glutinosa (L.) Gaertn.) u Sloveniji čini samo 0,4 % (približno 4708 ha) ukupne površine šumskog zemljišta (Čater i sur., 2001.). Veći kompleks takvih sastojina u Sloveniji su Črni i Polanski Log, a istraživanje je provedeno na području potonjeg (slika 1). Kako čiste sastojine johe odlikuju brojne specifičnosti, potrebno im je prilagoditi šumskouzgojne postupke. Da bi se utvrdio odgovarajući intenzitet prorjede takvih sastojina, 1967. godine u Polanskom Logu postavljene su pokusne plohe. Od tada do 2018. godine na plohama je izvršeno pet do sedam mjerenja. Sva stabla na plohama su bila obrojčana. Izvršeno je mjerenje prsnih promjera i procjena sljedećih elemenata na stablima: pripadnost etaži, vitalnost, uzgojna perspektiva, uzgojna uloga, duljina krošnje i kvaliteta (tablica 3). Svaka ploha bila je podijeljena u tri polja (40 x 50 m) s različitim metodama rada: bez intervencije, umjereno i intenzivno prorjeđivanje. Uzgojni postupci koji su poduzeti tijekom praćenja pokusa prikazani su u tablici 2. Danas su te sastojine u zreloj fazi razvoja, stoga smo u ovom radu analizirali reakcije crne johe na različite intenzitete prorjeđivanja i dobivene rezultate usporedili s preporukama autora tradicionalnih uzgojnih modela i modela koji se temelje na situacijskoj njezi šuma. Ustanovili smo da se na plohama s intenzivnim prorjeđivanjem gustoća sastojine koja je u dobi između 50 i 70 godina i na kraju je ophodnje kreće od 295 do 690 kom/ha (slika 3), dok se na plohama bez intervencije ova vrijednost kreće u rasponu od 370 do 790 kom/ha. Drvne zalihe u istom su se razdoblju kretale u rasponu od 277 do 458 m<sup>3</sup>/ha na plohama s intenzivnim prorjeđivanjem, dok su na plohama bez intervencije bile veće, u rasponu od 309 do 516 m<sup>3</sup>/ha (slika 4). U to su se doba temeljnice nalazile u rasponu između 23 i 41 m<sup>2</sup>/ha na plohama s intenzivnim prorjeđivanjem, a na plohama bez intervencije u rasponu od 26 do čak 51 m<sup>2</sup>/ha (slika 5). Tijekom cijelog razdoblja praćenja ploha, stabla su, bez obzira na metodu rada, narasla za tri do četiri debljinska stupnja (slika 2). Na plohama s umjerenim prorjeđivanjem i onima bez intervencije, debljinski prirast stabala bio je skoro jednak (0,33 cm godišnje) (slika 6). Statistički je značajan veći debljinski prirast stabala na plohama s jako intenzivnim prorjeđivanjem (0,37 cm godišnje). Debljinski prirast dominantnih stabala bio je nešto veći, od 0,46 cm godišnje na plohama bez intervencije do 0,50 cm godišnje na plohama s jako intenzivnim prorjeđivanjem, ali statistički značajne razlike između metoda rada nisu utvrđene (slika 6). Međutim, otkrili smo da kod dominantnih stabala ne postoje statistički značajne razlike s obzirom na njihovu slojevitost, vitalnost, tendenciju, dužinu krošnje i kvalitete s obzirom na korištenu metodu rada. U usporedbi s uzgojnim modelima koji su se koristili za manji broj odabranih stabla, gustoća i temeljnica ispitivanih sastojina je znatno veća, a debljinski prirast manji. Autori tradicionalnih i modela s manjim brojem odabranih stabala zagovaraju rano prorjeđivanje takvih sastojina (tablica 1). Veće razlike nastaju u konačnom broju stabala po hektaru i u intenzitetu intervencije. Razlog malog debljinskog prirasta i razlike između metoda rada na našim plohama pripisali smo nedovoljnom intenzitetu i djelomično nedosljednoj provedbi postupka prorjeđivanja. Ipak, ukazala se potreba za intenzivnim prorjeđivanjem i pospješivanjem rasta stabala najvećeg prsnog promjera, vitalnosti i tendencije, lijepo oblikovane i duge krošnje (slika 7, slika 8).

scholarly journals Effects of botanical antifeedants on Melolontha melolontha grub feeding on Scots pine roots

2014 ◽  
Vol 56 (3) ◽  
pp. 135-140 ◽  
Author(s):  
Iwona Skrzecz ◽  
Alicja Sowińska ◽  
Wojciech Janiszewski
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Pure Water ◽  
Alnus Glutinosa ◽  
Open Area ◽  
Antifeedant Activity ◽  
Tree Roots ◽  
Black Alder ◽  
Melolontha Melolontha ◽  
Extent Of Damage

Abstract The aim of the study was to evaluate the possibility of using botanic antifeedants to reduce the damage caused by Melolontha spp. grubs. To achieve the objective, the experiments were established in semi-field conditions to estimate the antifeedant activity of rutin, quercetin (flavonoids from buckwheat Fagopyrum esculentum) and an extract from black alder Alnus glutinosa leaves against Melolontha melolontha grubs. The grubs were placed individually in the pots with a soil in which 2 year old Pinus sylvestris trees were planted. The pots were put in garden pavilions placed in the open area. Then the soil in the pots were watered with the emulsions of rutin, quercetin, an extract from A. glutinosa leaves, and with pure water-comparative variant. After 4 months, the weight and mortality of grubs were compared, as well as the weight of tree roots in all pots. There was no effect of the antifeedants on the development and extent of damage caused by M. melolontha grubs. The results do not indicate the use of botanic antifeedants in the protection of forests against the cockchafer grubs

Sign in / Sign up

Export Citation Format

Share Document