Effects of decay classes and diameter classes on physico-chemical properties of Pinus koraiensis log in a typical mixed broadleaved-Korean pine forest.
Effects of decay classes and diameter classes on physico-chemical properties of Pinus koraiensis log in a typical mixed broadleaved-Korean pine forest.
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DOI：
10.17521/cjpe.2016.0187
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发表时间：
2016-12
影响因子：
--
通讯作者：
Zhang Yu;Jin Guangze
中科院分区：
文献类型：
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作者：
Zhang Yu;Jin Guangze
AIMS原木是大多数森林生态系统的重要组成部分。它在维持土壤肥力、维持生物多样性以及碳(C)和养分的循环方面起着至关重要的作用。然而，原木的理化性质随腐朽级别和直径级别的不同而不同。以中国北部典型阔叶红松混交林为研究对象，研究衰退级和径级对原木理化性质的影响。学习，直径类。纤维素含量随着腐烂程度的增加而降低。与纤维素相反，木质素含量随着腐烂级别的增加而增加。而纤维素和木质素含量在径级间无明显变化趋势。原木含水率与C、N、P浓度和木质素含量(心材P浓度除外)呈显著正相关，与纤维素含量呈显著负相关(p<；0.05)。木材密度与C、N、P浓度和木质素含量呈负相关，与纤维素含量呈正相关(p<；0.05)。因此，原木的理化性质在腐朽级和径级上都有独特的规律，原木的物理性质(含水率和木材密度)是影响其化学含量变化的重要因素。
Aims Log is an important component for most of forest ecosystems. It plays crucial roles in maintaining soil fertility, sustaining biodiversity and cycling of carbon (C) and nutrient. However, physico-chemical properties of logs vary with decay classes and diameter classes. Our objective was to study effects of decay classes and diameter classes on physico-chemical properties of logs in a typical mixed broadleaved-Korean pine forest in northern China. study, diameter class. The cellulose content decreased with an increasing decay class. In contrast to the cellulose, the lignin content increased with an increased decay class. However, cellulose and lignin contents exhibited no dis-tinct trend among diameter classes. The moisture content of logs had a significant positive correlation with C, N, P concentrations and lignin content (except P concentrations of the heartwood), but had a significant negative correlation with the cellulose content ( p < 0.05). The wood density was negatively correlated with C, N, P concentrations and the lignin content, but it was positively correlated with the cellulose content ( p < 0.05). Therefore, physico-chemical properties of logs had unique patterns along both decay classes and diameter classes, and the physical properties of logs (the moisture content and wood density) were important factor affecting the variations of their chemical contents.