林间草地土壤氮、磷、钾空间异质性研究

徐智; 王志军; 范文静; 杨光

doi:10.3969/j.issn.1001-5485.2015.01.012

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raybet体育在线院报 ›› 2015, Vol. 32 ›› Issue (1) : 57-61. DOI: 10.3969/j.issn.1001-5485.2015.01.012

水土保持与生态建设

林间草地土壤氮、磷、钾空间异质性研究

徐智¹, 王志军², 范文静³, 杨光⁴

作者信息 +

Spatial Heterogeneity of Nitrogen, Phosphorus and Potassiumof Soil in Forest Grassland

XU Zhi¹,WANG Zhi-jun²,FAN Wen-jing³,YANG Guang⁴

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文章历史 +

摘要

以林间草地土壤水解性氮、有效磷、速效钾含量与土层和植被分布格局之间的关系为研究对象,利用统计学方法研究了土壤上层(0~30 cm)水解性氮、有效磷、速效钾小尺度上的空间异质性,掌握其变异规律。研究结果表明:①土壤表层水解性氮、有效磷和速效钾含量均明显高于底层;②距离树木较近的点各层土壤水解性氮、有效磷、速效钾含量较高,而取样地以草本植物为主的点上土壤水解性氮、有效磷、速效钾含量次之,路边土壤取样点的土壤水解性氮、有效磷、速效钾含量最低;③水解性氮、有效磷及速效钾含量均与土壤厚度呈极显著(P<0.01)或显著(P<0.05)负相关;除速效钾外,土壤水解性氮和有效磷的分布在植被类型的影响下具有极显著(P<0.01)或显著(P<0.05)差异;植被土层对土壤水解性氮、有效磷及速效钾的分布均有显著(P<0.05)的互作作用。

Abstract

Statistical approaches were employed to research the small-scale spatial heterogeneity of hydrolytic nitrogen, available phosphorus, and rapidly available potassium in the soil of forest grassland. The relationship between the content of nitrogen, phosphorus, and potassium and the distribution of vegetation were obtained. Results revealed that 1) contents of hydrolytic nitrogen, available phosphorus and rapidly available potassium in soil surface were significantly higher than those in the bottom;2) contents of hydrolytic nitrogen, available phosphorus and rapidly available potassium at sampling points in each soil layer in the adjacent of trees were the highest, followed by those at points where the ground is dominated by herbaceous and points at roadside;3) contents of hydrolytic nitrogen, available phosphorus and rapidly available potassium were in highly-significant (P<0.01) or significant (P<0.05) negative correlation with soil thickness. Apart from potassium, the distribution of hydrolytic nitrogen and phosphorus had highly significant (P<0.01) or significant (P<0.05) difference under the influence of vegetation types. Vegetation and soil layer had significant (P<0.05) interaction effect on the distribution of soil hydrolytic nitrogen, phosphorus and potassium.

导出引用

徐智, 王志军, 范文静, 杨光. 林间草地土壤氮、磷、钾空间异质性研究[J]. raybet体育在线院报. 2015, 32(1): 57-61 https://doi.org/10.3969/j.issn.1001-5485.2015.01.012

XU Zhi,WANG Zhi-jun,FAN Wen-jing,YANG Guang. Spatial Heterogeneity of Nitrogen, Phosphorus and Potassiumof Soil in Forest Grassland[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(1): 57-61 https://doi.org/10.3969/j.issn.1001-5485.2015.01.012

中图分类号： S714

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