不同种植年限紫穗槐根际非根际土壤磷组分含量特征  

Phosphorus contents in the rhizosphere and bulk soil under Amorpha fruticosa established in different years

作　　者：李金辉[1] 卢鑫[1] 周志宇[1] 赵萍[1] 金茜[1] 周媛媛[1] 

机构地区：[1]草地农业生态系统国家重点实验室兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草业学报》2014年第6期61-68,共8页Acta Prataculturae Sinica

基　　金：国家科技支撑计划资助项目(2007BAD80B05);国家自然科学基金项目(31201849)资助

摘　　要：以不同种植年限的紫穗槐根际和非根际土壤为试验对象,采用Tiessen等修正后的Hedley土壤磷素分级方法,对其有效磷、全磷及不同形态磷组分进行了分析研究。结果表明,不同年限根际土壤有效磷含量均高于非根际土壤。从无机磷含量特征可以看出除了H2O-Pi(水溶磷)和Conc.HCl-Pi(浓HCl提取无机磷)外,其余无机磷均是Y60的含量最高。不同形态磷:除Y28的NaHCO3-Po(0.5 mol/L NaHCO3提取有机磷)外,其他株龄的NaHCO3-Pi(0.5mol/L NaHCO3提取无机磷),NaOH-Pi(0.1mol/L NaOH提取无机磷),NaHCO3-Po,NaOH-Po(0.1mol/L NaOH提取有机磷),Conc.HCl-Po(浓HCl提取有机磷)含量均是根际高于非根际土壤相应磷指标含量。根际土壤有效磷与Dil.HCl-Pi和Conc.HCl-Po含量显著相关(P<0.05),H2O-Pi与Total-P含量显著相关(P<0.05),根际和非根际土壤有效磷与pH值和根际全磷含量相关性均不显著(P>0.05)。The rhizosphere and bulk soil of Amorpha fruticosa established in different years were studied.Available phosphorus（P）,total P and P fractions were analysed using the method of Hedley which was a soil P classification method revised by Tiessen.Available P levels in the rhizosphere were higher than those out of the rhizosphere.The Y60 had the highest inorganic P content than the other except for H2O-Pi and Conc.HCl-Pi.The NaHCO3-Pi,NaOH-Pi,NaHCO3-Po,NaOH-Po,and Conc.HCl-Po in the rhizosphere were higher than those in bulk soil in different aged Amorphaexcept for NaHCO3-Po in Y28.Available P in the rhizosphere had a significant relationship with Dil.HCl-Pi and Conc.HCl-Po.H2O-Pi and total P had a significant relationship.Available P and pH in the rhizosphere and out of the rhizosphere did not have a significant relationship with total P in the rhizosphere.

关 键 词：毛乌素沙地 紫穗槐 不同种植年限 根际土壤 磷组分 

分 类 号：S793.2[农业科学—林木遗传育种]