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黄花甸子流域土壤全氮含量空间分布及其影响因素

李龙,姚云峰**,秦富仓,高玉寒,张美丽   

  1. (内蒙古农业大学生态环境学院, 呼和浩特 010018)
  • 出版日期:2015-05-18 发布日期:2015-05-18

Spatial distribution pattern of soil nitrogen in Huanghuadianzi watershed and related affecting factors.

LI Long, YAO Yun-feng, QIN Fu-cang, GAO Yu-han, ZHANG Mei-li   

  1. (College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010018, China)
  • Online:2015-05-18 Published:2015-05-18

摘要:

以内蒙古赤峰市敖汉旗黄花甸子流域为研究对象,运用地统计学方法分析流域内土壤全氮含量的空间分布特征及地形因子和土地利用方式对其的影响.结果表明:流域内各土层土壤全氮含量均呈岛状分布,其高值区均集中分布在流域西北部,呈现出明显肥岛状;低值区主要在流域南部连片分布.全氮主要富集在表层土壤中,且随着土壤深度的增加而降低.土壤全氮含量随着海拔的增加均呈现出先增高后降低的趋势;随坡度的增加而显著降低;不同坡向上表现为阴坡>半阴坡>半阳坡>阳坡.不同土地利用方式下土壤全氮平均含量由高到低表现为农地>林地>草地.
 
 

Abstract: This research was conducted in Huanghuadianzi watershed in Aohan, Chifeng, Inner Mongolia. Geostatistic was used to study the spatial distribution of soil nitrogen and their affecting factors. The results showed that the soil nitrogen contents in all layers distributed as an island shape, and the high value areas were mainly distributed in the northwest of the watershed as an obvious fertile island shape, while the low value areas were mainly distributed in the south of the watershed. Nitrogen was mainly concentrated in the surface soil, and its content decreased with the increase of soil depth. The soil nitrogen content at first increased then decreased with the altitude, decreased with the slope, and showed the order of shady slope>semishady slope>semisunny slope>sunny slope in different aspects. The average soil nitrogen contents in different land use types ranked as cropland >woodland > grassland.