in this study, nutrition, nutrient return and nutrient retranslocation were compared between two stands of alnus subcordata (n-fixing tree) and taxodium distichum (coniferous deciduous tree), planted on a weak drained soil in north of iran (tashbandan, amol). in each tree stand, n, p, k, ca and mg concentration of fresh and senescent leaves and soil were measured. the concentrations of n and mg...

The urban environment is stressful and trees experience multiple stresses, including drought, flooding, extreme heat, all of which are likely to increase under future climate warming increasing urbanisation. In the selection tree species maximise ecosystem services, tolerance site characteristics such as flooding severe drought critical importance. This study evaluated suitability a rare specie...

Drought stress is a major environmental factor limiting plant growth. Selection of drought-tolerant plants critical importance in vegetation restoration and forestation programs. Alnus subcordata Acer velutinum are two valuable, dominant, endemic species the Hyrcanian forests. There fast-growing significant diffuse-porous hardwood afforestation reforestation. One-year old seedlings both were ex...

Caucasian alder is a large tree and one of the commercial species in the Caspian forests. We investigated the wound healing rate (WHR) and compared the diameter growth (DG) of 66 wounded and 66 unwounded alder trees 15 years after selected logging in these forests. The conditions of the wounds after 15 years were as follows: 56.1% had closed, 25.7% were open, and 18.2% had decayed. The mean WHR...

in order to identify daldinia species in guilan province, several specimens were collected during 2011–13. a total of six taxa, including daldinia caldariorum (on morus alba); d. childiae (on parrotia persica, pterocarya fraxinifolia, morus alba, quercus sp., prunus sp., citrus sinensis, gleditschia caspica, buxus sempervirens, carpinis betulus and alnus subcordata); d. gelatinoides (on m. alba...