【摘要】 通过土壤旱作和淹水两种培养方式 ,研究了外源混合稀土积累对黄褐土肥力性状的影响。结果表明 ,在旱培条件下稀土处理浓度与土壤有效氮含量之间有显著的线性正相关 ,淹水条件下有显著的线性负相关 ;两种培养条件下 ,稀土处理降低土壤有效磷含量 ,对交换态盐基离子含量无显著影响 ,但增加电导率和水溶态离子 ,尤其是Ca2 + 离子的含量。更多还原

【Abstract】 China has the largest reserves and output of rare earths (REs) in the world, and the application of REs in agriculture has been carried out early and has made great progress However, long term use of REs may cause large amount of accumulation of REs in soil and exert negative effect on soil chemical and biological properties In the past few years, many researches have been focused on the effects of exogenous REs on soil fertilizer, the composition of soil solution, soil microbes and enzymes, especially the changes of the availability of macronutrients in soil such as nitrogen, phosphate etc because the use of REs fertilizer has attracted more attention due to their important role in agricultural production and ecological balance In this paper, the contents of soil available N, P, exchangeable and water soluble cations K + , Na + ,Ca 2+ , Mg 2+ as well as soil electric conductivity were determined respectively, and the effects of exogenous rare earths (REs) on the fertility of yellow cinnamon soil were studied through soil culture in both dry and flooding conditions The results showed that the concentrations of the applied REs had significant positive correlation with the contents of soil available N in dry condition, and significant negative correlation with that in flooding condition REs treatments led to the decrease of the contents of soil available P in both dry and flooding conditions There was no significant effects of REs on soil exchangeable cations, but the applications of REs increased electric conductivity and the contents of water soluble cations, especially that of Ca 2+更多还原