Za uspješno pošumljavanje sredozemnog krškog područja trebalo bi zadovoljiti niz uvjeta, od kojih su najvažniji vrsta drveća i kvaliteta sadnica za pošumljavanje. Kako bi se utvrdio učinak pojedinog kontejnera na razvijenost (kvalitetu) nadzemnog i podzemnog dijela sadnica, analizirana su morfološka svojstva jednogodišnjih (1 + 0) sadnica alepskoga bora (Pinushalepensis Mill.) uzgajanih u različitim kontejnerima. U ovom istraživanju, korištena su četiri tipa kontejnera: Multipot 53/12 (‘’Bosnaplast 12’’), Multipot 33/18 (‘’Bosnaplast 18’’), T 7/24 (PVC tuljak 7/24) i T 8/24 (PVC tuljak 8/24). Varijable koje su proučavane u laboratoriju bile su: visina stabljike, promjer vrata korijena, biomasa nadzemnog dijela, biomasa korijena i ukupna biomasa biljke. Iz izmjerenih varijabli izračunata su dva morfološka indeksa: omjer nadzemni/podzemni i Dicksonov kvalitativni index. Skenerom STD 1600 i softwareom WinRhizo Pro utvrđene su morfološke dimenzije korijena: ukupna duljina, broj vrhova, površina plašta i volumen korijena. Za usporedbu morfoloških karakteristika sadnica prema tipu kontejnera korištena je analiza varijance (ANOVA) i višestruki Turkeyev post hoc test. Rezultati istraživanja morfoloških svojstava biljaka na uzorku od 20 sadnica po tipu kontejnera pokazali su značajno veće vrijednosti u većim kontejnerima (T 7/24 i T 8/24) u odnosu na manje kontejnere (MP 53/12 i MP 33/18). Analiza korijena sadnica alepskoga bora iz najmanjih kontejnera (MP 53/12) pokazuje izraziti stupanj deformacije istog, kod nešto većih kontejnera (MP 33/18) deformacija korijena prisutna je u znatno manjoj mjeri, ali je zato nedovoljna proraslost korijena kod sadnica uzgajanih u većim kontejnerima, iako kod njih nisu zapažene deformacije. Zbog izrazitih deformacija korijena sadnica alepskoga bora u kontejneru MP 53/12, a koji su posljedica neadekvatnih dimenzija istog i općenito, tehnološke zastarjelosti Multipot (‘’Bosnaplast 12 i 18’’) kontejnera, preporuča se njihovo
postupno napuštanje iz rasadničarske proizvodnje, te daljnjim istraživanjima raditi na pronalaženju novih, modernijih rješenja koja će biti prilagođena proizvodnji što kvalitetnijih sadnica namijenjenih pošumljavanju sredozemnog krškog područja.For successful afforestation in Mediterranean karst areas several important criteria must be fulfilled, especially adequate tree species selection and high-quality seedlings.Considering above mentioned conditions, morphological features of one-year old Aleppo pine (Pinus halepensis Mill.) seedlings were analyzed. Seedlings were grown in diff erent types of containers to establish the effect of container type on development (quality) of above- and belowground parts of the seedlings. Four types of containers were used: MP53/12, MP33/18, T7/24 and T8/24. Studied seedling variables (morphological features) include: seedling height, root collar diameter, biomass of the aboveground part of the seedlings and total seedling biomass. Two morphological indexes were calculated from measured variables: S/R ratio and DQI. Morphological dimensions of root systems (total root length, number of root tips, surface area and root volume) were scanned with ST 1600 scanner and measured with WinRhizo Pro software. Morphological features with regard to container type were evaluated with analysis of variance (ANOVA) and multiple Turkey’s post hoc test.
Morphological features of seedlings derived from the samples of 20 seedlings per container type, mostly showed significantly higher values in larger containers (T7/24 and T8/24) compared to smaller containers (MP53/12 and MP33/18). Root analyses also showed that roots of seedlings from smallest containers (MP53/12) were deformed to a high degree. In larger containers (MP33/18) root deformation was largely reduced. On the other hand, bind of roots into growing medium in seedlings grown in large containers was insuffi cient, although the roots were not deformed.
Seedlings of Aleppo pine (Pinus halepensis Mill.) grown in container MP53/12 have developed highly deformed root systems because of inadequate dimensions of this container and its technological absoluteness. Therefore is recommended to gradually abandon the use of MP53/12 and MP33/18 containers from nursery production. Further research is needed to eventually define new, modern solutions adapted to production of high-quality seedlings for aff orestation of Mediterranean karst area
