نتایج جستجو برای: mixed and natural stands

تعداد نتایج: 16917246  

2010
Rong Mao De-Hui Zeng Dan Yang Lu-Jun Li Yun-Xia Liu

Nitrogen (N)-fixing species have a function to enrich N in soil. Mixing N-fixing shrub species into poplar stands can be assumed as a measure to increase productivity while improving soil fertility. To verify this assumption and to understand the temporal influences of N-fixing shrub species mixed into poplar plantations on soil fertility, we investigated selected soil chemical and microbial pr...

Journal: :Forests 2022

Forest plantations, particularly high-density planted stands, are considered to be more prone wind damage compared naturally regenerated stands. The resistance (mechanical stability) of plantations can, however, improved by close-to-natural management, for example, combining pioneer and shade-tolerant species. Presumably, the stability such stands would enhanced reduced competition canopy trees...

Journal: :Forestry: An International Journal of Forest Research 2019

2005
BRIAN ROY LOCKHART JAMES S. MEADOWS

Stand development involves changes in stand structure over time. Knowledge of stand development patterns is crucial for effective forest management, especially of southern bottomland hardwood forests. These forests contain more than 70 tree species, many of which have commercial timber and wildlife habitat value. I n this paper, current techniques i n stand development research are reviewed. Em...

Journal: :تحقیقات جنگل و صنوبر ایران 0
خسرو ثاقب طالبی دانشیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور ژینوس جشنی کارشناس ارشد جنگل داری، دانشکده منابع طبیعی دانشگاه تهران شیرزاد محمدنژادکیاسری استادیار پژوهش، مرکز تحقیقات کشاورزی و منابع طبیعی استان مازندران حمید محمدی نصرآبادی کارشناس ارشد جنگل داری، دانشکده منابع طبیعی دانشگاه تهران محبوبه پایدار کارشناس ارشد جنگل داری، دانشکده منابع طبیعی دانشگاه تهران

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2013
Eero Nikinmaa

The effects after 25 years of moose browsing on Scots pine stands in Lahemaa National Park were evaluated, emphasizing economic damage. A re-evaluation in 2001 examined stands that had been evaluated in 1975–1976. Moose damage significantly affected the tree species composition which changed over time as pine dominance increased and the number of mixed stands declined. The smaller proportion of...

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