不同海拔高度下梵净山土壤碳、氮、磷分布特征

发布时间：2018-01-01 16:33

本文关键词：不同海拔高度下梵净山土壤碳、氮、磷分布特征　出处：《水土保持研究》2016年03期 　论文类型：期刊论文

【摘要】：为探明梵净山地区海拔高度与土壤性质间的关系,在不同海拔高度采集不同深度土层土样,测定土壤有机质、全氮、全磷、碱解氮、有效磷含量。结果表明:在不同采样深度下,随着土层深度的增加,土壤有机质、全氮、全磷、碱解氮、有效磷以及碳氮比、碳磷比和氮磷比均逐渐下降。在不同海拔高度下,受气候、生物和地形等因素的影响,0—20cm层土壤中有机质、碱解氮含量与海拔高度显著相关,有机质含量随海拔的增加呈先增加后下降的趋势,在海拔1 450m达到最大值,碱解氮含量随海拔的增加而增加;20—40cm层土壤各项指标与海拔高度相关度不紧密;40—60cm层土壤中,有机质、全氮含量、碳磷比、氮磷比与海拔高度显著相关,均随海拔的增加而增加。
[Abstract]:In order to investigate the relationship between elevation and soil properties in Fanjingshan area, soil samples of different depths were collected at different altitudes to determine soil organic matter, total nitrogen, total phosphorus and alkali-hydrolyzed nitrogen. The results showed that with the increase of soil depth, soil organic matter, total nitrogen, total phosphorus, alkali-hydrolyzed nitrogen, available phosphorus and the ratio of carbon to nitrogen were increased at different sampling depths. The ratio of carbon to phosphorus and nitrogen to phosphorus decreased gradually. At different elevations, the soil organic matter and alkali-hydrolyzed nitrogen content in 0-20cm layer affected by climate, biology and topography were significantly correlated with altitude. The content of organic matter increased first and then decreased with the increase of altitude, and reached the maximum value at 1 450 m above sea level, and the content of alkali-hydrolyzed nitrogen increased with the increase of altitude. The correlation between soil indexes of 20-40cm layer and altitude was not close. In 40-60 cm soil, organic matter, total nitrogen content, C / P ratio and N / P ratio were significantly correlated with altitude, and all increased with the increase of altitude.
【作者单位】：贵州大学;贵州梵净山国家级自然保护区管理局;贵州省生物研究所;贵州医科大学;
【基金】：梵净山科研专项贵州省省院合作项目(黔科合院地合20130072) 贵州省科技厅社发攻关资助项目(黔科合SY字[2013]3157号) 贵州省社发攻关课题(黔科合SY字[2013]3152)
【分类号】：S714.2
【正文快照】： 土壤碳、氮、磷是植物生长的必需元素,其分布特征影响植物的整个生长过程。海拔高度是影响土壤碳氮磷含量分布的重要因素之一,海拔高度的变化会造成气候、植物类型与土壤类型等的改变,从而影响土壤理化性质与养分供应情况。目前已有诸多研究结果表明,海拔高度与土壤碳氮磷存在

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