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[1]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.

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Differentiation Characteristics of Topsoil Nutrients of the Micro-topography in Gneiss Mountainous Area of Pingshan County, Hebei Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 06 Page number: 84-90 Column: Public date: 2017-11-24

Title:: Differentiation Characteristics of Topsoil Nutrients of the Micro-topography in Gneiss Mountainous Area of Pingshan County, Hebei Province

Author(s):: YUAN Zhen, WEI Songpo, JIA Liming, ZHANG Yaxiong, LIU Longlong; Province-Ministry Co-constructed Key Laboratory of Silviculture and Conservation, Ministry of Education, Beijing Forestry University, Beijing 100083, China

Keywords:: gneiss mountainous area; micro-topography; soil nutrients; spatial variability; grey correlation analysis

CLC:: S151.9

DOI:: -

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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