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| 亚热带几种林分类型土壤有机碳变化特征及与土壤性质的关系 | |
| 引用本文： | 安晓娟,李萍,戴伟,尹其悦,王丹,莫莉.亚热带几种林分类型土壤有机碳变化特征及与土壤性质的关系[J].中国农学通报,2012,28(22):53-58. |
| 作者姓名： | 安晓娟 李萍 戴伟 尹其悦 王丹 莫莉 |
| 作者单位： | 1. 北京林业大学水土保持学院,北京,100083 2. 北京市农业局土肥站,北京,100029 3. 中国林科院森林生态环境与保护研究所,北京,100091 |
| 基金项目： | 科技部林业公益性行业科研专项项目“江西大岗山森林生态系统健康维护与经营技术研究”（200804022E） |
| 摘 要： | 为了研究亚热带天然次生林不同更新方式对土壤有机碳特征影响，将江西大岗山天然次生林分别采伐更新为马褂木林、马尾松林、杉木林和马褂木-桤木混交林，在比较分析不同更新方式对土壤有机碳含量特征影响的基础上，进一步利用相关和逐步回归分析方法，研究了不同土壤性质对土壤有机碳的影响。结果表明：与次生林相比，几种更新林分在不同程度上降低了土壤有机碳含量，改变了土壤有机碳的层间分布特征。在0~40 cm的剖面内，土壤有机碳含量的降幅分别为：马褂木林＞马尾松林＞杉木林＞马褂木-桤木混交林；与其他更新对象相比，马褂木林作为更新树种会导致土壤有机碳含量的大幅降低，不利于土壤碳储量的增加。但与桤木混交后，却可以明显减少有机碳含量降幅，显示出良好的混交效果；分别建立的0~20 cm和20~40 cm土层的土壤有机碳含量和土壤性质的回归方程显示出较高的回归精度，比较标准化回归系数法处理显示，土壤全氮量、有效铁含量和碱解氮含量是导致不同层次土壤有机碳变异的主导影响因子。 |
| 关 键 词： | 土壤pH 土壤pH |
| 收稿时间： | 2012/4/12 0:00:00 |
| 修稿时间： | 5/7/2012 12:00:00 AM |
The Variation Characteristics of Soil Organic Carbon and Its Relationship with Soil Properties in Typical Subtropical Plantations |
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| An Xiaojuan , Li Ping , Dai Wei , Yin Qiyue , Wang Dan , Mo Li.The Variation Characteristics of Soil Organic Carbon and Its Relationship with Soil Properties in Typical Subtropical Plantations[J].Chinese Agricultural Science Bulletin,2012,28(22):53-58. | |
| Authors: | An Xiaojuan Li Ping Dai Wei Yin Qiyue Wang Dan Mo Li |
| Institution: | 1 (1 College of Soil and Water Conservation,Beijing Forestry University,Beijing 100083;2 Beijing Soil and Fertilizer Station,Beijing 100029;3 Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091) |
| Abstract: | In order to study the influence of soil organic carbon content by regeneration in typical subtropical plantations,the natural secondary forest in subtropical zone of Dagang Mountains of Jiangxi Province were cutting and regeneration of 4 plantations （Liriodendron chinense,Pinus massoniana,Cunninghamia lanceolata,Alnus-Liriodendron）.On the basis of comparative analysis of different update characteristics of soil organic carbon content,and further correlation analysis and stepwise regression analysis were also used to analyze the influence of soil physic-chemical properties on soil organic carbon.Results showed that all regenerations significantly decreased content of soil organic carbon and changed the distribution characteristics compared with the natural secondary forest.The soil organic carbon content in the depth of 0-40 cm all decreased in the order of Liriodendron chinense〉 Pinus massoniana〉 Cunninghamia lanceolata〉 Alnus-Liriodendron.Liriodendron chinense was not conducive to the increase in soil carbon stocks,because it led to enormous reduction of soil organic carbon content comparing with other regenerated plantations.When Liriodendron chinense and Alnus mixed,it significantly narrowed the decline of the organic carbon content and showed a good mixed effect.The regression formula of organic carbon content and soil properties in the depth of 0-20 cm and 20-40 cm were established with high regression estimation precision.The comparison with Beta suggested that soil nitrogen,available iron and alkali-hydrolyzable nitrogen were the leading factors of SOC content variation. |
| Keywords: | subtropical zone forest stands regeneration soil organic carbon soil properties |
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