The effects of clear‐felling subalpine coniferous forests on soil physical and chemical properties in the eastern Tibetan Plateau
The effects of clear‐felling subalpine coniferous forests on soil physical and chemical properties in the eastern Tibetan Plateau
复制标题
DOI：
10.1111/j.1475-2743.2010.00324.x
复制
发表时间：
2011-06
影响因子：
3.8
通讯作者：
X. Pang;Weikai Bao;Ning Wu
中科院分区：
文献类型：
--
作者：
X. Pang;Weikai Bao;Ning Wu
确定砍伐后的土壤质量变化对于指导森林的可持续管理非常重要。在这项研究中，我们确定了在青藏高原东部进行皆伐后4年、5年、10年和17年土壤理化性质的变化。这些属性也进行了比较，从邻近的原始森林的土壤。结果表明：（1）皆伐后0-20 cm和20-40 cm土壤容重持续增加;（2）皆伐后0-20 cm土壤C和全N持续下降;（3）皆伐对土壤速效养分和交换性阳离子有显著影响。几乎所有的土壤性质都显示出在短时间内从清除砍伐和随后的季节性放牧的牛恶化的趋势。因此，改善管理对于保持土壤质量和保持皆伐林分的长期养分平衡至关重要。停止放牧等人类活动应成为砍伐区土壤恢复的主要战略。
Establishing soil quality changes following clear‐felling is important for guiding the sustainable management of forests. In this study we identified changes after 4, 5, 10 and 17 yr in soil physical and chemical properties from clear‐felling in the eastern Tibetan Plateau. These properties were also compared with those of soil from an adjacent primary forest. The results show that: (i) bulk density at 0–20 and 20–40 cm soil layer continuously increased; (ii) soil C and total N in the 0–20 cm soil layer continuously declined following clear‐felling; and (iii) available soil nutrients and exchangeable cations were significantly influenced by clear‐felling. Almost all soil properties showed deteriorating trends within a short time from clear‐felling and subsequent seasonal grazing by cattle. Therefore, improved management is imperative for sustaining soil quality and maintaining the long‐term nutrient balance in clear‐cut stands. The cessation of anthropogenic activities such as grazing should be the main strategy for soil restoration in clear‐felled areas.