Effects of Leaf Loss by Artificial Defoliation on the Growth of Different Poplar and Willow Varieties

The cultivation of fast-growing tree species in short rotation coppices has gained popularity Germany recent years. resilience these to phyllophagous pest organisms is crucial for their profitable management, since the loss a single annual increment can lead uncompensable economic losses. To study effects leaf on growth poplar and willow varieties that are frequently cultivated under local conditions, three sample including five (Populus spp.) (Salix were established randomized block design with four artificial defoliation variants and, one site, different regarding number treatments. After up treatments within two growing seasons, results show negative height fresh weight aboveground biomass plants. Our data also suggests lasting effect plant re-growth after end treatment. In general, had greater impact poplars than willows. We conclude even minor have an but actual clearly depend species, variety as well extent defoliations, which determine ability plants compensatory growth.