FENG Jiaoyin,HUANG Changmou,SHI Xiyuan,et al.Changes of Soil Physical and Chemical Properties of Forest Land in the Early Stage of Eucalyptus and Erythrophleum fordii Mixed Forest[J].Research of Soil and Water Conservation,2017,24(03):295-300.
桉树与格木混交初期土壤理化性质的变化
- Title:
- Changes of Soil Physical and Chemical Properties of Forest Land in the Early Stage of Eucalyptus and Erythrophleum fordii Mixed Forest
- Keywords:
- Eucalyptus grandis×Eucalyptus urophylla; Erythrophleum fordi; mixed forests; soil physical and chemical properties; phenolic compounds
- 分类号:
- S792.39
- 摘要:
- 以2年生桉树人工林及桉树、格木混交林为对象，对其造林初期林地土壤理化性质的变化进行研究，探讨其土壤理化性质、土壤酶活性与土壤酚类物质间的关系。结果表明：（1） 两种林分根区土壤pH值较小，0—20 cm土壤pH值大于20—40 cm，混交林林间0—20 cm土壤自然含水率、容重、最大持水量、总孔隙度、通气度均较桉树纯林大；对林间20—40 cm土层而言，桉树×格木混交林容重、总孔隙度、通气度、排水能力均比桉树纯林大，自然含水率、最大持水量相反。（2） 混交林林间0—20 cm土壤脲酶活性最大，为1.46 mg/（g·h），脲酶、磷酸酶及多酚氧化酶活性均表现为桉树根区大于格木根区，且较桉树纯林桉树根区大。（3） 桉树纯林根区总酚、复合酚含量最大，混交林林间0—20 cm水溶酚含量最大，土壤水溶酚含量范围为0.62~2.04 μg/g。桉树纯林造林初期土壤中酚类物质含量较低，未造成土壤酚类物质的积累；桉树与格木混交初期能改善土壤理化性质，提高土壤酶活性；土壤理化性质、土壤酶活性与酚酸物质含量间存在着一定的相关性。
- Abstract:
- Study on the changes of soil physical and chemical properties of forest land in the early stage of afforestation was carried out with 2-year-old Eucalyptus grandis×Eucalyptus urophylla plantations and the mixed forest of Eucalyptus grandis×Eucalyptus urophylla and Erythrophleum fordii as the samples. The relationship between soil physical, chemical properties, soil enzyme activities and soil phenolic substances was investigated. The results show that: (1) the pH values of soil in the root zone of the two kinds of forest stands were small. The pH value in the 0—20 cm soil layer is greater than that in the 20—40 cm layer. The soil natural moisture content, bulk density, maximum moisture content, total porosity and aeration degree in the mixed forest in 0—20 cm soil layer were higher than those in the pure forest. For 20—40 cm depth in the forest, the bulk density, total porosity, ventilation and drainage capacity were higher than those in the pure forest, but the natural water content and maximum water holding capacity were instead. The urease activity in mixed forest in the 0—20 cm soil layer was 1.46 mg/(g·h), which reached the maximum. The activity of urease, phosphatase and polyphenol oxidase in the mixed forest showed that in the Eucalyptus grandis×Eucalyptus urophylla root zone was bigger than Erythrophleum fordii root zone, and there were minimum in the Eucalyptus grandis×E. urophylla root zone in the pure forest. The content of total phenols and compound phenols were the largest in the root zone in the pure forest. The content of water soluble phenol in the 0—20 cm soil layer of mixed forest was maximum. The content range of soil water soluble phenol was 0.62~2.04 μg/g. The contents of phenolic compounds in soil were low in the early stage of pure forest, it did not accumulated in the soil. Eucalyptus grandis×Eucalyptus urophylla and Erythrophleum fordii mixed planting could improve soil physical and chemical properties and soil enzyme activity in the early stage. There was a certain correlation between soil physical and chemical properties, soil enzyme activities and the contents of phenolic acids.
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备注/Memo
收稿日期:2016-05-23;改回日期:2016-06-07。
基金项目:国家自然科学基金（31260176）；广西自然科学基金（2015GXNSFAA139081）
作者简介:冯娇银(1970-),女(壮族)广西南宁人,本科,主要从事人工林培育与经营方面的林业生产与管理工作。E-mail:121954148@qq.com
通讯作者:杨梅(1970-),女,吉林长春人,教授,博士,主要从事森林培育方面的研究及教学工作。E-mail:fjyangmei@126.com