不同地被物处理方式对红壤坡地养分状况的影响  

Effects of Different Ground Cover Treatments on Nutrient Status of Red Soil Slope Land

作　　者：陈志[1,2] 王伟峰[3] 代云川 孙丽[2] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650593 [2]云南省地矿局第一水文地质工程地质大队,昆明650041 [3]内蒙古林业科学研究院生态功能与森林碳汇研究所,呼和浩特010010 [4]云南师范大学旅游与地理科学学院,昆明650500

出　　处：《水土保持研究》2016年第3期54-57,64,共5页Research of Soil and Water Conservation

摘　　要：选择3种不同水保措施的径流小区,即百喜草(Paspalum natatu)全园覆盖处理、全园敷盖处理和全园裸露处理,分析和测定了不同坡位和深度土层中土壤有机质、全N和全P空间异质性之间的关系。结果表明:(1)有机质含量随着土层增加整体呈先增加后减少的趋势,在自上而下坡面上,有机质含量全园覆盖区无明显变化,全园敷盖区有递增趋势,全园裸露区则先增加后减少;(2)全N含量随着深度加深均呈下降趋势,各处理间无显著性差异。在坡面上,全N含量大小为:全园覆盖区>全园敷盖区>全园裸露区,且全园敷盖处理在坡面中部有富集作用,全园覆盖和全园裸露处理自上而下呈下降趋势;(3)全P含量随着土层加深,全园覆盖区逐渐减少,全园敷盖区和全园裸露区先增加后减少。在坡面上,全P含量大小为:全园敷盖区>全园覆盖区>全园裸露区,且在坡面中部有富集作用。该研究可为亚热带地区红壤坡地养分恢复途径提供科学依据。Three runoff residence communities with different measures for water conservation were chosen to investigate the three residence communities which are covered by Paspalurn natatu, the entire covered park, the entire mulched park and no vegetation park. The soil organic matter in different slopes and depths, and the relationship of the spatial heterogeneity between TN, TP had measured and analysed. The results indica- ted that; （1） the organic matter content increased first and then reduced with the increase of soil layers. The organic matter content had no significant change from the top to bottom of the slope. The organic matter content of the entire covered park increased, and the organic matter content in the no vegetation park increased first and then reduced;（2） TN reduced as the soil layers became deeper, and therers no significant difference between the treatments, the TN content on the slope presented as the sequence： the entire covered park〉the entire mulched park〉no vegetation park, the treatment of the entire mulched park had concentra- tion effect on the middle of the slope, and TN contents of the treatments of the entire covered park and no vegetation park decreased from the top to the bottom;（3） TP content reduced as the soil depth increased, reduced gradually in the entire covered park and increased first and then reduced in the entire mulched park and no vegetation park, on the slope, the TP content followd the order; the entire mulched park〉the entire covered park〉no vegetation park, and it had concentration effect on the middle of the slope. This study could provide scientific basis for recovery of the nutrients of the red earth slope land in subtropical zone.

关 键 词：地被物处理 红壤坡地 土壤养分 百喜草 

分 类 号：S156.6[农业科学—土壤学]