Improvement of quality of young sessile oak (Quercus petraea Liebl.) exclusively by intraspecific competition
2000
Fischer, H.
The first life-phase of forest stands is of vital importance for the production of high quality wood. It is the most dynamic phase of forest stand development. The purpose of the survey is to determine how oak stands develop by examining similar afforested sites of various age. The study is located 50 km west of Goettingen where a step by step afforestation with sessile oak is established. "Natural conditions" were investigated by describing a theoretical time sequence. The ageincreases from stand to stand. The range is between 5 and 24 years. A total number of 7 different ages is available where no silvicultural treatment has been undertaken. - The paper deals with quality alteration, especially ramification. Five categorieswere used to characterize crown morphology. The intraspecific competition, resulting from stand density has an important influence on growth within the time sequence. The younger stands up to 10 years of age, contained a high percentage of poorly-formedcrowns (type 4 and 5). The portion of trees described as "monocorm" (type 1) grew from 10% among the 5-year-old stands to 36% among the oldest, aged 24 years, and the portion of in brush-like and fork type trees becomes insignificant over the time.
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