|Table of Contents|

Spatial Distribution and Influencing Factors Analysis of Cropland Soil Total Nitrogen in Huangshui River Basin(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年16
Page:
131-138
Research Field:
Publishing date:

Info

Title:
Spatial Distribution and Influencing Factors Analysis of Cropland Soil Total Nitrogen in Huangshui River Basin
Author(s):
DAI Zijun1; ZHAO Xia1; SHI Pingchao1; 2
(1.Physical Geography and Environmental Process Key Laboratory of Qinghai Province，Qinghai Normal University，Xining，Qinghai 810008；2.Agriculture and Animal Husbandry Science and Technology Bureau of Songtao Miao Autonomous County，Songtao，Guizhou 554100)
Keywords:
soil total nitrogen; cropland soil; Geo-statistics; spatial distribution; influencing factors
PACS:
-
DOI:
10.11937/bfyy.20170507
Abstract:
Soil total nitrogen (TN) is one of the important indicators reflecting soil quality.Huangshui River Basin is the main grain producing area in Qinghai Province.At present，the soil research on Huangshui River Basin was mainly concentrated in the evaluation of soil nutrient in cropland，soil microbial dynamic distribution research.Studying for spatial distribution and influencing factors of cropland TN content was rarely reported in this Basin.Therefore，based on the 38 topsoil (0-20 cm) TN data of existing literatures on cropland in Huangshui River Basin，combined traditional statistics and geostatistics，analyzed spatial distribution and influencing factors of cropland topsoil TN in Huangshui River Basin.The result indicated that the mean TN content was about 1.33 g?kg-1，the coefficient of variation was 47.37%，belonged to a moderate variation.And TN content of spatial distribution decreased from north to south while an alternative trends of first increasing and then decreasing from east to west，regarding to Ordinary Kriging analysis.As for the distribution trends of TN content regarding to national standard，high-level value (>1.50 g?kg-1) was mainly distributed in the high-altitude of Datong county and Haiyan county，low-level value (<1.00 g?kg-1) was mainly distributed in the low-altitude of Minhe county and Huangzhong county.Among which，about 65.5% area of the basin reached beyond the average level (1.30 g?kg-1).Temperature，altitude and precipitation were three main influencing factors of TN content distribution in this basin，according to correlation analysis，variance analysis and regression analysis，which accounts for 35.7%，29.0% and 21.3% of TN variability，respectively，soil type and fertilization showed certain amount of correlation with TN while very low impacts value due to data lacking.The results showed that the spatial distribution of cropland topsoil TN in Huangshui River Basin，provided useful reference for the scientific management of cropland，and provided a basis for rational fertilization work.

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Last Update: 2017-08-31