东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

杉木人工林不同发育阶段土壤性质变化的研究

期刊名称：北京林业大学学报, 2010(03), 59-63.
时间：0
分类：S714.2[农业科学—林学] S718.8[农业科学—林学]
作者机构：[1]北京林业大学水土保持学院, [2]中国林业科学研究院森林生态环境与保护研究所, [3]中国林业科学研究院亚热带林业实验中心
相关基金：林业公益性行业科研专项（200804022E）; “十一五”国家科技支撑计划项目（2006BAD03A0702）; 国家自然科学基金项目（30590381）; 江西大岗山国家级森林生态站项目
相关项目：我国主要陆地生态系统对全球变化的响应和适应性样带研究

关键词：杉木人工林, 发育阶段, 土壤性质, Chinese fir plantation, developmental stages, soil properties

中文摘要：

通过对杉木幼龄林、中龄林、近熟林、成熟林和过熟林5个发育阶段下土壤主要理化性质和生物学性质的分析,探讨了杉木不同发育阶段对土壤性质的影响。结果表明：土壤密度、孔隙度、饱和持水量和田间持水量均受到林木生长的显著影响,这种影响在表层最强烈;土壤有机质含量、全氮量、碱解氮含量和速效钾含量以及土壤细菌、放线菌和真菌数量都表现出幼龄林阶段较高、其后开始明显下降且多数指标在近熟林阶段达到最低、成熟林阶段显著提高、至过熟林阶段达到整个生长发育最高水平的规律性变化。相关分析表明：土壤理化性质表现出的规律性变化与不同阶段下土壤微生物状况的改变密切相关。土壤有效磷含量仅在近熟林—成熟林阶段有显著增加,其他阶段变化不显著。在中龄林和近熟林阶段土壤出现明显的负向极化变化趋势,在该阶段进行整地、施肥等营林措施可能会对林木生长有良好的促进作用。

英文摘要：

In this study,physical,chemical and biological soil properties of Chinese fir（Cunninghamia lanceolata） plantations at five developmental stages,i.e.,young,middle,pre-mature,mature and over-mature,were determined,to investigate the effects of developmental stages on soil properties.Results show that bulk density,total porosity,saturated water holding capacity and field water holding capacity of soils were significantly affected by tree growth,especially at depths of 0-20 cm.The amounts of soil organic matter,total nitrogen,alkali-hydrolyzable nitrogen and readily available potassium,as well as the number of bacteria,fungi and actinomycetes showed higher values in young plantations,followed by decreases reaching a minimum in pre-mature plantations,and then significantly increased in mature plantations,with maximum values found in over-mature plantations.Correlation analysis showed that a regular change of soil properties was closely correlated with soil microorganisms at different developmental stages.The amount of available phosphorus in the soils significantly increased from pre-mature to mature plantations,but no significant variations were found at other developmental stages.Significantly negative polarization present in soils of middle and pre-mature plantations suggest that soil preparation and fertilization during these two stages could effectively improve tree growth.