[1]刘 勇,李国雷,李瑞生,等.密度调控对油松人工林土壤肥力的影响[J].西北林学院学报,2008,23(06):18.
 LIU Yong,LI Guolei,LI Ruisheng,et al.Effected of Tree Density on Soil Fertility in Pinus tabulaeformis P lantations[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2008,23(06):18.
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密度调控对油松人工林土壤肥力的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第23卷
期数:
2008年06期
页码:
18
栏目:
森林生物、生理、生态、植物、气象等
出版日期:
2008-11-30

文章信息/Info

Title:
Effected of Tree Density on Soil Fertility in Pinus tabulaeformis P lantations
作者:
刘 勇 1 李国雷 1 李瑞生 2 郭 蓓 1 徐 扬 1
1.北京林业大学 省部共建森林培育与保护教育部重点实验室,北京 100083;2.北京市园林绿化局,北京 102100
Author(s):
LIU Yong 1 LI Guoˉlei 1 LI Ruiˉsheng 2 GUO Bei 1 XU Yang 1
1. Key Laboratory for Silviculture and Conservation, Ministry of E ducation, Beijing Forestry University, Beijing 100083, China; 2 Beijing Municipal Bureau of Landscape and Forestry, Beijing 100029, China
关键词:
油松人工林间伐土壤肥力主成分分析
Keywords:
Pinus tabulaeformis plantation thinning soil fertility pri nciple component analysis
文献标志码:
A
摘要:
2001年,在北京市延庆县营盘村附近中山,对保存密度为3 300株·hm -2 的25 a生油松人 工林设置27.3%、41.7%、48.5% 和57.6%4个间伐强度的处理。4 a后,通过比较土壤物理性质、 化学性质和土壤酶的变化,探讨用土壤肥力评价间伐效果的可行性。结果表明:土壤有效磷含量、 速效钾含量、毛管孔隙度随间伐强度的增大而增大,非毛管孔隙度与间伐强度成反比。 5种土壤酶 活性、最大持水量和毛管持水量均以间伐强度48.5%时最大。碱性磷酸酶活性峰值均出现在4 月,脲酶活性、有机质含量、速效钾含量、有效磷含量高峰值多出现在10月。脲酶活性谷值均出现 在6月,多酚氧化酶、碱性磷酸酶谷值出现在10月。土壤过氧化氢酶活性、碱性磷酸酶活性、脲酶 活性、最大毛管持水量和毛管持水量可以作为油松林地土壤肥力评价的指标。用土壤肥力评价间 伐效果可行、易测,25 a生保留密度3 300株·hm -2 的油松人工林以57.6%左右的间伐强度土壤 肥力维持最优。
Abstract:
As the main afforestation tree species in the warm temper ature humid and semiˉhumid climatic reˉ gion in China, it is important to study the soil fertility and u nderstory vegetation from the aspect of susˉ tainable management for Pinus tabulaeformis plantations. In 2001, the ef fects of thinning intensities with four different treatments of 27.3%(Ⅰ), 41.7%(Ⅱ), 48.5%(Ⅲ) an d 57.6%(Ⅳ), on the soil fertility were manipulated in the 25ˉyearˉold P.tabulaeformis stands with pre served density of 3300 trees·hm -2 , in middle hilly lands of Yingpan, Yanqing Country, Bejing. In 2005, whether the thinning effect could be evaluated by soil fertility or not was carried out through the c omparison of soil physiochemical properties and soil enzymes in the four stands. The results showed that con trary to non capillary soil porosity, both capillary soil porosity and the content of soil available P and K were enhanced by thinning intensity. Howˉ ever, five types of enzymes, maximum soil moisture capacity and ca pillary moisture capacity were optiˉ mized in the stands with Ⅲ thinning intensities. Also, the maximum a ctivity of alkaline phosphatase was showed in April mostly and that of urease, organic C, available K and available P were in October. For the four stands, the lowest value of urease was exhibited in June, w hile those of both polyphenol oxidase and alkaline phosphatas were in October. Among the sixteen indexes, soi l catalase, alkaline phosphatase, ureˉ ase, maximum capillary moisture capacity, and capillary moisture cap acity could be perceived as indicators to assess soil fertility. Specifically, the method for the evaluat ion of the thinning effect by soil fertility was feasible and simple. Generally, for the 25ˉyearˉold forest with stand ing density of 3 300 trees·hm -2 , the reasonable thinning intensity should be about 57.6%.

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备注/Memo

备注/Memo:
收稿日期:2007ˉ12ˉ16 修回日期:2008ˉ06ˉ08 基金项目:国家自然科学基金项目(30
471380);北京市教委项目(JD100220648) 作者简介:刘勇,男,博士,教授,博士生导师
,主要研究方向是森林培育学。Eˉmail:lyong@bjfu.edu.cn。
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