白龙江干旱河谷不同植被土壤碳氮磷化学计量特征
作者:
作者单位:

(1.甘肃省白龙江林业管理局林业科学研究所,甘肃 兰州 730070;2.甘肃省白龙江森林生态系统国家定位观测研究站,甘肃 舟曲 746300)

作者简介:

赵栋(1985-),男,甘肃会宁人,高级工程师,硕士,主要从事森林生态和森林经营研究。E-mail:405694634@qq.com。

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基金项目:

基金项目:甘肃省自然科学基金项目 150RJZK179;甘肃省林业科技计划项目2016kj061,2015KJ049。


Effect of different vegetation types on soil ecological stoichiometry in Bailong river
Author:
Affiliation:

(1.Institute of ForestryScience,Bailongjiang Forestry Management Bureau of GansuProvience,Lanzhou Gansu730070;2.Gansu Bailongjiang National Forest Ecosystem ResearchStation,Zhouqu Gansu746300)

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    摘要:

    探讨不同植被类型土壤碳(C)氮(N)磷(P)含量及生态化学计量特征,了解不同植被类型土壤养分状况及对土壤的改良效果,为干旱河谷植被恢复重建中的植被空间分布格局及造林技术提供理论依据和技术指导。采用野外调查与室内分析相结合的方法,测定了干旱河谷刺槐( Robinia pseudoacacia)、狼牙刺(Sophora davidii)、河朔荛花( Wikstroemia chamaedaphne)、华西小石积( Osteomeles schwerinae)、酸枣( Ziziphus jujuba)和荆条( Vitex negundo)等主要人工林土壤的碳、氮和磷含量,运用模糊数学隶属函数法综合评价了不同林型对土壤营养和化学计量特征的影响。白龙江干旱河谷 6种植被类型土壤 C、N、P含量均处于中下水平;刺槐、狼牙刺、华西小石积、酸枣和荆条土壤 C∶N值随土层的加深而升高;6种植被类型土壤 C∶P、N∶P平均值均远远低于全球平均水平和我国平均水平。6种植被类型对土壤营养元素、化学计量和土壤物理性质改良效果最好的为河朔荛花,其次为荆条,再次为刺槐,因此推荐选择上述 3树种作为白龙江干旱河谷造林先锋树种。

    Abstract:

    In order to understand the artificial forest soil nutrient status and ameliorationeffects,the soil contents of carbon(C),nitrogen(N),and phosphorus(P)and ecological stoichiometric characteristics of different vegetation types were analyzed to provide the theoretical basis and technical guidance for the spatial distribution pattern and technology ofafforestation for vegetation restoration.The changes ofC,N and P contents of the six different vegetation types of artificialforest,i.e.Robinia pseudoacacia,Sophora davidii,Wikstroemia chamaedaphn,Osteomeles schwerinae,Ziziphus jujube, Vitex negundo,were measured with field investigation and laboratory analysis,and the effects of different vegetation typeson soil nutrient and stoichiometric characteristics were evaluated by fuzzy mathematic membership function method.ThesoilC,N and P contents in artificial forest of different vegetation types were relativelylow,and were in the middle and lower levels in dry-hot valley region in Bailongriver.The soil C∶N ratio of the Robinia pseudoacacia,Sophora davidii, Osteomeles schwerinae,Ziziphus jujube,Vitex negundowere increased with the increasing soildepth.The average soilC∶P and N∶P ratios of the six vegetation types were much lower than the average value of the global countries orChina.Themost effective vegetation type for amelioration on soil nutrientelements,stoichiometry and soil physical properties was the Wikstroemia chamaedaphne,followed by Vitex negundo and then by Robinia pseudoacacia.Therefore,these three species were recommended as the pioneer species of afforestation in dry-hot valley region in Bailongriver.

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引用本文

赵栋,王琪,连娥,魏海龙,郭星.白龙江干旱河谷不同植被土壤碳氮磷化学计量特征[J].中国土壤与肥料,2020,(4):178-185.

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  • 收稿日期:2019-07-23
  • 最后修改日期:
  • 录用日期:2019-10-30
  • 在线发布日期: 2020-09-14