【摘要】 为揭示闽西紫色土水土流失区不同保措施对土壤碳、氮、磷的影响机制,采集宁化县水保科教园径流小区5种不同水保措施下的表层土壤,分析其土壤碳(C)、氮(N)、磷(P)的生态化学计量特征,结果表明:(1)不同水保措施下,土壤磷含量稳定,土壤碳、氮变化较大;不同水保措施对土壤碳、氮影响大,土壤磷受水保措施影响小。(2)不同水保措施下土壤C/N比变化相对稳定,C/P与N/P比变化范围较大。紫色土C/N/P比值显著低于全国平均水平。(3)土壤C/P、N/P、C/N受水保措施影响较大,土壤C/P、N/P、C/N比值受多种因素的影响。研究结论可为闽西紫色土区治理水土流失提供科学依据。更多还原

【Abstract】 In order to reveal the influence mechanism of different soil conservation measures on soil carbon,nitrogen and phosphorus in the purple soil area of western Fujian Province,It was collected the surface soil under five different soil conservation measures in the runoff area of the Soil Conservation Science and Education Garden of Ninghua County for the analysis of the eco-stoichiometric characteristics of soil carbon(C),nitrogen(N) and phosphorus(P).The results showed that:(1) under different soil conservation measures,the content of phosphorus in soil was stable,soil carbon and nitrogen changed greatly.Different soil conservation measures had a great impact on soil carbon and nitrogen,and soil phosphorus was less affected by soil conservation measures.(2) Under different soil conservation measures,the change of C/N ratio was relatively stable,while the change range of C/P and N/P ratio was larger.The C/N/P ratio of purple soil was significantly lower than the national average.(3) Soil C/P,N/P and C/N were greatly affected by water and soil conservation measures,and soil C/P,N/P and C/N ratio are affected by various factors.The conclusion can provide scientific basis for controlling soil erosion in the purple soil area of western Fujian Province.更多还原