The effect of climate on radial growth of Quercus liaotungensis forest trees in Loess Plateau, China
The effect of climate on radial growth of Quercus liaotungensis forest trees in Loess Plateau, China
复制标题
DOI：
10.1016/j.dendro.2007.01.005
复制
发表时间：
2007-01-01
影响因子：
3
通讯作者：
Hou, Qingchun
中科院分区：
文献类型：
--
作者：
Du, Sheng;Yamanaka, Norikazu;Hou, Qingchun
通过对黄土高原荒漠化地区辽东栎天然林年轮生长的研究，探讨了气候对辽东栎年轮生长的影响。增量核心采样和交叉日期为120棵树从6个立场0.5-2.5公里。网站树轮年表创建使用一般dendrochronological技术。树轮指数与月气候变量的相关分析结果表明，径向生长量与前一年9月和当年4 ~ 6月的降水量呈正相关。年轮宽度在春季和夏季受到温度的负面影响。相比之下，前10月的温和温度显示出积极的影响。结果表明，降水是重要的，在生长季节的早期，土壤和空气干燥，高温往往会减少径向生长在这一地区。9月的雨季和温暖的10月可能提供有利于碳储存的条件，有利于土壤微生物活性，并促进根系生长和芽成熟，以对抗随后季节的胁迫的不利影响。两种气候变量的影响在各地块之间也存在一些差异，这可能是由于不同的结构和地理条件改变了微环境。研究结果可为该地区的造林管理提供参考。预计Q.辽东栎林宜建在空气和土壤干旱胁迫不严重的阴坡和半阴坡。(c)2007年，Elsevier GmbH。All rights reserved.
Annual ring growth of Quercus liaotungensis trees in natural forests bounded by desertified region in the Loess Plateau of China was investigated for the evidence of climatic influence. Increment cores were sampled and cross-dated for 120 trees from six stands 0.5-2.5 km apart. Site tree-ring chronologies were created using general dendrochronological techniques. The results of correlation analyses between tree-ring indices and monthly climatic variables indicated that radial growth was positively correlated with precipitation in September of the previous year and that from April to June of the current year. Ring widths were negatively affected by temperature during spring and summer. In contrast, mild temperature in the previous October showed a positive influence. The results suggest that precipitation is important in the early growing season when soil and air are dry, and that high temperatures tend to reduce radial growth in this region. September rainfalls and a warm October may provide conditions that facilitate carbon storage, favor soil microbial activity, and promote root growth and shoot maturation against detrimental effects of stresses in the following seasons. There were also some differences among plots in the effects of both climatic variables probably as a result of different structures and geographical conditions that modified microenvironments. The results may contribute to the reforestation management of the area. It is expected that Q. liaotungensis forests should be ecologically established in this region on shady and half-shady slopes where air and soil drought stresses are not serious. (c) 2007 Elsevier GmbH. All rights reserved.