基于Tiessen方法的土壤磷分级浸提过程的改进研究

发布时间：2018-02-02 06:05

本文关键词： 连续浸提无机磷组分有机磷组分难溶态磷组分　出处：《土壤通报》2017年01期 　论文类型：期刊论文

【摘要】：选取四川盆地的紫色土、水稻土、潮土和黄壤4种代表性土壤作为研究对象,采用改进的M法与Tiessen法对土壤磷组分进行分级研究。结果表明:两种方法测得的磷组分含量及其占全磷的百分率除HCl-Pi外,无机磷组分均为紫色土显著高于水稻土、潮土和黄壤(P0.05),而有机磷组分在这4种土壤中则差异不明显(P0.05)。总体来看,两种方法间差异显著的组分主要为KCl-Pi和Na OH-Pi(P0.05)。通过变异系数分析表明M法浸提的有机磷组分含量比Tiessen法重现性好。Pearson相关性分析表明两种方法测得的磷组分与全磷、速效磷、有机碳、全氮等的相关程度接近。回归分析表明,两种方法相同磷组分测定值间呈明显的线性关系(P0.01),能通过校正系数相互转换。因此,增加有机磷组分测定及磷组分浸提时间均为4 h的M法可代替Tiessen法分级测定土壤中的磷组分。
[Abstract]:The purple soil, paddy soil, tidal soil and yellow soil of Sichuan Basin were selected as the research objects. The improved M method and Tiessen method were used to classify the phosphorus components in soil. The results showed that the contents of phosphorus components and the percentage of total phosphorus in the two methods were except HCl-Pi. The inorganic phosphorus components in purple soil were significantly higher than those in paddy soil, while the organic phosphorus components in the four soils were not significantly different from those in paddy soil. The main components with significant difference between the two methods are KCl-Pi and NaOH-PiP0.05). The coefficient of variation analysis showed that the content of organophosphorus extracted by M method was better than that by Tiessen method. Pearson correlation analysis showed that the phosphorus components and total phosphorus determined by two methods were better than those by Tiessen method. The correlation degree of available phosphorus, organic carbon and total nitrogen was close. Regression analysis showed that there was a significant linear relationship between the determination values of the same phosphorus components of the two methods, which could be converted by correction coefficient. M method with organic phosphorus component determination and phosphorus extraction time of 4 h can be used instead of Tiessen method to determine phosphorus component in soil.
【作者单位】：四川农业大学环境学院;四川农业大学资源学院;
【基金】：国家科技支撑计划(2012BAD14B18-2)资助
【分类号】：S153.6
【正文快照】： 徐光荣,张世熔,钟钦梅,李婷,徐小逊,邓欧平,杨玲.基于Tiessen方法的土壤磷分级浸提过程的改进研究[J].土壤通报,2017,48(1):134-140XU Guang-rong,ZHANG Shi-rong,ZHONG Qin-mei,LI Ting,XU Xiao-xun,DENG Ou-ping,YANG Ling.Comparison Study onExtraction Methods of Phosph

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