应用数学模型模拟中国白浆土的磷素特征

The study on the feature of phosphorus in bleached baijiang soil in China using mathematical model

在中国东北黑龙江和吉林两省的具有代表性的4个白浆土区取12个土样,采用JFHaseman等人的方法研究了无机磷的吸附。结果表明,在不同平衡液中白浆土磷的等温吸附曲线与Langmuir吸附等温的公式拟和良好;应用Cooke方法和经验(P=Rt+B)公式描述了白浆土磷素释放特征,证明了磷素释放速率与速效磷含量、有机质含量、生物百分比产量呈显著正相关,相关系数可达0 992 、0 935 、0 999。图3,表3,参7。

Twelve samples were taken from four regions of typical bleached baijiang soil in Jilin and Heilongjiang provinces, northeastern China. The methods of J F Haseman were adopted to evaluated the adsorption of inorganic phosphors. The results showed that curves of isothermal adsorption in different balanced solutions have a similar trend with the Langmuir adsorption equation. The nature of P release in bleached baijiang soil is characterized by Cooke method and empirical formula(P=Rt+B).The results showed that there are a positive correlation between P-release and available P content, organic matter content, and ratio of biomass (r=0.992, 0.910^(**) and 0.935^(**) respectively).