YUAN Zhen,WEI Songpo,JIA Liming,et al.Differentiation Characteristics of Topsoil Nutrients of the Micro-topography in Gneiss Mountainous Area of Pingshan County, Hebei Province[J].Research of Soil and Water Conservation,2017,24(06):84-90.
河北平山片麻岩山区微地形表层土壤养分异质性分析
- Title:
- Differentiation Characteristics of Topsoil Nutrients of the Micro-topography in Gneiss Mountainous Area of Pingshan County, Hebei Province
- Keywords:
- gneiss mountainous area; micro-topography; soil nutrients; spatial variability; grey correlation analysis
- 分类号:
- S151.9
- 摘要:
- 以河北平山片麻岩山区7种微地形（坡顶、塌陷、巨石背阴、缓台、陡坎、谷坡、U形沟）及原状坡的表层土壤养分测定数据为基础，对比分析不同微地形及原状坡之间表层土壤养分的异质性，为片麻岩山区植被恢复提供科学依据。结果表明：（1）微地形、坡向、风化层厚度均影响了表层土壤养分的变化，而微地形是引起这种变化的主要因子。（2）微地形的表层土壤养分特征多数优于原状坡。其中，U形沟、塌陷和巨石背阴处有机质含量最大（68.94 g/kg，60.71 g/kg，62.77 g/kg），显著高于其他微地形和原状坡，坡顶处最小（22.58 g/kg）。（3）全氮与全磷含量规律基本一致，都在U形沟、塌陷和巨石背阴处最大，缓台和坡顶处较小。全钾含量在坡顶、陡坎、谷坡处最大（11.88 g/kg，12.56 g/kg，11.67 g/kg），塌陷、巨石背阴处较小（9.39 g/kg，9.69 g/kg）。（4）碱解氮含量在U形沟、塌陷和巨石背阴处最大（6.87 mg/kg，6.54 mg/kg，5.93 mg/kg），显著高于其他微地形及原状坡，坡顶处最小（3.75 mg/kg）。U形沟处速效磷含量最大（3.55 mg/kg），塌陷、巨石背阴、陡坎和谷坡次之，这5种微地形显著高于坡顶和原状坡，坡顶处最小（1.27 mg/kg）。速效钾含量在坡顶、陡坎达到最大（60.09 mg/kg，58.27 mg/kg），这2种微地形显著高于其他微地形和原状坡。（5）通过对7种微地形和原状坡的3个坡向的表层土壤养分进行灰色关联分析，得出U形沟、塌陷和巨石背阴的土壤养分条件最好，坡顶和原状坡的土壤养分条件最差。
- Abstract:
- Based on the determination data of topsoil nutrients in gneiss mountainous area in Pingshan County of Hebei Province, we analyzed the differences of topsoil nutrients on seven micro-topographies including slope crest, collapse, stone shadow, platform, scarp, brae and U-gully, with the undisturbed slope as the control, in order to provide scientific reference for the revegetation of gneiss mountainous area. The results showed that:(1) according to correlation analysis, micro-topography, aspect and the weathered layer thickness influenced the change of topsoil nutrients, among which micro-topography was the main factor; (2) the topsoil nutrient conditions on most of the micro-topographies were better than the undisturbed slope; U-gully, collapse, stone shadow contained significant higher organic matter contents (68.94 g/kg, 60.71 g/kg, 62.77 g/kg) than other micro-topographies and the undisturbed slope, and the lowest on slope crest (22.58 g/kg); (3) changes of total nitrogen content and total phosphorus content are similar, and the thire contents were highest on U-gully, collapse, stone shadow, the lowest on platform, slope crest; total potassium contents on slope crest, scarp, brae were the highest (11.88 g/kg, 12.56 g/kg, 11.67 g/kg), while the least contents (9.39 g/kg, 9.69 g/kg) were observed on collapse, stone shadow; (4) U-gully, collapse, stone shadow contained significantly higher available nitrogen contents (6.87 mg/kg, 6.54 mg/kg, 5.93 mg/kg) than the other micro-topographies and the undisturbed slope, the lowest on slope crest (3.75 mg/kg). U-gully had the highest available phosphorus content (3.55 mg/kg), followed by collapse, stone shadow, scarp and brae; contents of available phosphorus on the five micro-topographies were significantly higher than the undisturbed slope and slope crest(1.27 mg/kg) which had the lowest available phosphorus content; available potassium contents on slope crest (60.09 mg/kg) and scarp (58.27 mg/kg) were significantly higher than other micro-topographies and the undisturbed slope; (5) through the grey correlation analysis on the topsoil nutrients of seven micro-topographies, it can be concluded that the conditions of topsoil nutrients on U-gully, collapse, stone shadow were best, worst on slope crest and the undisturbed slope.
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备注/Memo
收稿日期:2016-12-01;改回日期:2016-12-18。
基金项目:“十二五”国家科技支撑计划项目（2015BAD07B02）困难立地植被恢复技术研究与示范
作者简介:袁振(1990-),男,河南项城人,硕士研究生,主要从事困难立地植被恢复。E-mail:279938085@qq.com
通讯作者:贾黎明(1968-),男,山西忻州人,教授,博士生导师,主要从事森林培育理论与技术。E-mail:jlm@bjfu.edu.cn