Litterfall production and composition, fall pattern and nutrient content were studied in a mixed stand of Pinus nigra and Pinus pinaster (El Pozuelo), as well as in a pure stand of Pinus nigra (Beteta) in the Cuenca Mountains in order to determine the effect of two-season prescribed burning treatments. Needles were the most abundant fraction. Pinecone fraction decreased after burning in the mixed stand and the opposite occurred in the pure stand. The inflorescence fraction showed a decrease in the spring-burned plots at El Pozuelo and Beteta. Bark, branch and miscellaneous fractions were affected mainly by meteorological events. Low-intensity prescribed burning was not found to cause significant perturbations. The perturbation was mitigated over the years. An immediate effect of prescribed burning in spring was seen at El Pozuelo and Beteta, although it was more significant for the pure stand. The effect of prescribed burning in autumn at Beteta had a delayed response. As regards nutrient contents, no differences in carbon concentrations were detected. Overall, an increasing trend in N, P, K concentrations in needles after the burning treatment was found. Calcium was not a limiting factor. Magnesium content exhibited no clear trend.

中文翻译：

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两季低强度规定烧伤对凋落物生物量和养分含量的影响

在昆卡山脉的黑松和松树 (El Pozuelo) 的混合林分以及纯黑松 (Beteta) 林分中研究了凋落物的产生和组成、下降模式和营养成分，以确定效果两个季节规定的灼烧治疗。针是最丰富的部分。在混合林中燃烧后松果分数下降，而在纯林中则相反。El Pozuelo 和 Beteta 的春烧地块的花序部分减少。树皮、树枝和其他部分主要受气象事件的影响。没有发现低强度的规定燃烧会引起显着的扰动。多年来，这种扰动得到了缓解。在 El Pozuelo 和 Beteta 看到了规定的春季燃烧的立竿见影的效果，虽然对于纯粹的立场来说更重要。Beteta 秋季规定的燃烧效果有延迟反应。至于营养成分，没有检测到碳浓度的差异。总体而言，发现燃烧处理后针头中 N、P、K 浓度呈上升趋势。钙不是限制因素。镁含量没有表现出明显的趋势。