振荡方式对土壤磷素分级的影响  

Effect of Oscillation Modes on Soil Phosphorus Fraction

作　　者：薛艳凌 陈新平 张伟[1,2] Xue Yanling;Chen Xinping;Zhang Wei(College of Resources and Environment,Southwest University,Chongqing 400715;Academy of Agricultural Sciences,Southwest University,Chongqing 400715)

机构地区：[1]西南大学资源环境学院,重庆400715 [2]西南大学农业科学研究院,重庆400715

出　　处：《中国农学通报》2020年第33期80-86,共7页Chinese Agricultural Science Bulletin

基　　金：国家重点研发计划项目“南方山地玉米化肥农药减施技术集成研究与示范”(2018YFD0200700);中国博士后科学基金会面上资助项目“紫色土上三种典型蔬菜磷高效利用的根际过程及调控机制”(2018M643394);中央高校基本业务费专项资金(XDJK2019C062)。

摘　　要：探究不同振荡方式对磷形态的影响有助于理解磷分级的测定条件,本研究利用Tiessen磷素分级方法,通过分析2种振荡方式对土壤磷形态的影响揭示外界条件对土壤磷形态测定的影响。结果表明:2种振荡方式对水溶性磷和残留态磷含量有显著影响,振荡过程中横置离心管提取的水溶性磷浓度是竖置的1.8倍;横置离心管振荡提取的残留态的磷浓度较竖置降低了19 mg/kg;而对总磷、总有机磷、总无机磷及其他各形态的有机磷和无机磷则均无影响。从组成比例上,横置离心管提取测定磷形态导致水溶性磷的分布比例较竖置离心管提取测定提高6%。采用横置离心管振荡的方式提取的土壤水溶性磷和残留态磷浓度高于竖置方式。The study aims to evaluate the effect of different oscillation modes on soil P fractions, which contributes to understanding the determination conditions of P fractions.We used Tiessen method to reveal the influence of external conditions on the P fractions in soil treated with two oscillation modes.The results showed that the two modes of oscillation significantly affected the water-soluble P and residual P concentration.Compared to vertical placement, digestion with horizontal oscillation increased water-soluble P for 1.8 folds and decreased residual P concentration by 19 mg/kg.The two modes had no effect on total P, total organic P,total inorganic P and other P forms concentration.The distribution percentage of water-soluble P for horizontal oscillation increased by 6% compared to vertical placement.The water-soluble P and residual P concentration extracted by means of horizontal placement was higher than that by means of vertical oscillation.

关 键 词：振荡方式 Tiessen法磷分级 磷素形态 土壤有效磷 酸性紫色土 水溶性磷 残留态磷 

分 类 号：S158.2[农业科学—土壤学]