The coppice is a very flexible cultural system producing several calibers adapting to the demands of the market. Small-caliber roundwood from sweet chestnut (Castanea sativa Mill.) coppices, formerly in great demand, is now less interesting for the market. Thus, the improvement of coppices management by applying alternative silvicultural models in order to obtain benefits and sustainability is essential. For this purpose, four permanent plots (P1–P4) were established in 1994 to monitor different coppice management systems. The plots were installed in a coppice which resulted from the final clear cut of a sweet chestnut high-forest stand in 1992, at 50 years old. Three silvicultural management models were tested in order to produce roundwood of small (P1), medium (P2), and large (P4) diameters. A control plot was established without any type of silviculture which corresponds to most of the existing chestnut coppices (P3 = without intervention). Thinnings were applied in the plots according to the respective management model. Twenty-four years after the sprouting of the coppice, the silvicultural models were evaluated according to their objectives in terms of growth, yield, and quality of the sawlogs. This assessment period corresponds to the end of the rotation period for P1, and the results are in accordance with expected values. In P2 and P4 the observed growth closely matches expectations for this growth stage of the coppice. The quality of the sawlogs is clearly superior to that of the plot without intervention. Comparing the mean dendrometric values, higher values were observed in plots where the models were applied. The results also show that when roundwood is used for saw-timber, silvicultural management is essential.

中文翻译：

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营林管理模式的应用是否会推动欧洲板栗品种的生长和茎品质向可持续性发展？

小灌木林是一种非常灵活的文化体系，可生产多种口径以适应市场需求。小栗子的小口径圆木（Castanea sativa以前需求很大的coppices现在对市场不再那么感兴趣。因此，通过应用替代的造林模式以获取利益和可持续性来改善经营管理至关重要。为此，1994年建立了四个永久性地块（P1-P4），以监视不同的小灌木林管理系统。这些地块安装在一个小灌木林中，这是由于1992年对50岁的板栗高森林林林进行了最后的明确砍伐。为了生产小直径（P1），中直径（P2）和大直径（P4）的圆木，测试了三种造林管理模型。建立没有任何类型的营林的对照地块，而营林类型则对应于大多数现有的栗科动物（P3 =无需干预）。根据各自的管理模型在地块上应用了间伐。在小灌木丛发芽二十四年后，根据林木生长，产量和锯木质量的目标，对造林模式进行了评估。该评估期对应于P1的轮换期结束，其结果与预期值一致。在P2和P4中，观察到的增长与对小灌木林的这个增长阶段的预期非常接近。锯木的质量明显优于未经干预的地块。比较平均树突值，在应用模型的图中观察到更高的值。结果还表明，当将圆木用于锯材时，必须进行造林管理。根据林木生长，产量和质量的目标，评估了造林模式。该评估期对应于P1的轮换期结束，其结果与预期值一致。在P2和P4中，观察到的增长与对小灌木林的这个增长阶段的预期非常接近。锯木的质量明显优于未经干预的地块。比较平均树突值，在应用模型的图中观察到更高的值。结果还表明，当将圆木用于锯材时，必须进行造林管理。根据林木生长，产量和质量的目标，评估了造林模式。该评估期对应于P1的轮换期结束，其结果与预期值一致。在P2和P4中，观察到的增长与对小灌木林的这个增长阶段的预期非常接近。锯木的质量明显优于未经干预的地块。比较平均树突值，在应用模型的图中观察到更高的值。结果还表明，当将圆木用于锯材时，必须进行造林管理。结果与预期值一致。在P2和P4中，观察到的增长与对小灌木林的这个增长阶段的预期非常接近。锯木的质量明显优于未经干预的地块。比较平均树突值，在应用模型的图中观察到更高的值。结果还表明，当将圆木用于锯材时，必须进行造林管理。结果与预期值一致。在P2和P4中，观察到的增长与对小灌木林的这个增长阶段的预期非常接近。锯木的质量明显优于未经干预的地块。比较平均树突值，在应用模型的图中观察到更高的值。结果还表明，当将圆木用于锯材时，必须进行造林管理。