【摘要】 预测土壤需肥量是生产实际和土壤农化工作者关心的重要课题。本文应用了土壤磷等温吸附试验方法及“磷肥指标”测定方法,在上海地区几种主要土壤上,进行了预测麦子需磷量的田间对比试验,试验结果表明该二种方法对预测土壤需磷量都是可行的,其中以磷肥指标法较为简便。更多还原

【Abstract】 To evaluate the amount of fertilizer requirement of soil is an importantresearch question to agricultural practice and soil and agrochemistry workers.Usingthe methods of phosphorus of soil sorption by isotherms and phosphorus fertilizerindex,field experiments of evaluating the amount of phosphorus requirement for wheatwere carried out in some main soil in Shanghai.The results showed that bothmethods may be use to evaluate the amount of phosphorus requirement of soil,wher-eas the mtheod of phosphorus fertilizer index was more simple and convenient thanthe method of phosphorus by sorption isotherms of soil.更多还原