【摘要】 采用滴水穿透时间法(WDPT)测量在锡林浩特市采集的草原土壤样品(0～20cm,n=80)的斥水性(SWR),并对土壤物理化学参数如土壤含水量、有机质(SOM)含量和SWR的相关性进行分析。结果表明,土壤斥水性与含水量的关系符合正态分布,当土壤含水量为10.7%时,SWR达到峰值,平均为80s,斥水性与土壤粒径呈负相关(r=-0.753),土壤SWR值与总氮、速效氮含量和有机质含量呈正相关关系,与草地土壤中速效磷、速效钾和pH的相关性较低。上述研究结果揭示了土壤斥水性的影响因素,为提出土壤斥水性的改良措施提供依据。更多还原

【Abstract】 The objective of this study was to investigate the relationship between soil water repellency(SWR)and soil physical-chemical properties.The water content and organic matter of soil,sampling(0～20cm,n=80)in Xilin gol grassland were measured,and the SWR was analyzed using the water drop penetration time test(WDPT).Results showed that the relationship between SWR and soil water content accord with normal distribution.The average SWR was 80 s,and SWR reached its peaked when the soil water content was 10.7%.SWR and soil particle size were negatively correlated(r =-0.753).Soil WDPT values was positively correlated with total nitrogen,available nitrogen content and organic matter content,and had poorly correlated with available phosphorus,available potassium and pH in grassland soils.Our results can provide the influencing factors of SWR and provide the basis for the improvement measure of SWR.更多还原