نتایج جستجو برای: birch tree
تعداد نتایج: 174023 فیلتر نتایج به سال:
The use of liquid instead of solid culture medium for the micropropagation of plants offers advantages such as better access to medium components and scalability through possible automation of the processes. The objective of this work was to compare a new temporary immersion bioreactor (TIB) to solid medium culture for the micropropagation of a selection of tree species micropropagated for comm...
Nurse crops of widely spaced pioneer trees are a silvicultural approach to protect the regeneration of frost sensitive target tree species. If overstorey nurse crops are harvested, they can provide additional short-term benefits through increased biomass production, e.g., for bioenergy. However, the intensification of biomass exports from forests might impact negatively on ecosystem nutrient po...
A forested brownfield within Liberty State Park, Jersey City, New Jersey, USA, has soils with arsenic, chromium, lead, zinc and vanadium at concentrations above those considered ambient for the area. Using both satellite imagery and field spectral measurements, this study examines plant productivity at the assemblage and individual specimen level. Longer term growth trends (basal area increase ...
Deep planting is recommended in Nordic countries only for normal-sized container seedlings planted on mounds. Its effects smaller-sized are poorly understood. We studied the of depth early field performance small-sized silver birch (Betula pendula Roth) and Scots pine (Pinus sylvestris L.) seedlings. Silver (mean height 16 cm) were to depths 3, 6 8 cm spot mounds May 2016. 9 2, 5 inverted Septe...
Bronze birch borer (Agrilus anxius Gory) (Coleoptera: Buprestidae), a specialist wood-borer endemic to North America, is prone to periodic outbreaks that have caused widespread mortality of birch (Betula spp.) in boreal and north temperate forests. It is also the key pest of birch in ornamental landscapes. Amenity plantings have extended the distribution of birch in North America, for which we...
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