不同形态氮肥对磷肥生物有效性的影响  

Effects of Different Forms of Nitrogen on Phosphorus Availability to Plant

作　　者：于飞[1] 周健民[1] 王火焰[1] 陈小琴[1] 

机构地区：[1]中国科学院南京土壤研究所,江苏南京210008

出　　处：《土壤通报》2005年第3期371-374,共4页Chinese Journal of Soil Science

基　　金：国家自然科学基金(NFC40071051);973项目基金(G1999011802)

摘　　要：利用盆栽试验研究了潮土中不同形态氮肥对磷肥生物有效性的影响。结果表明:不同形态氮肥处理均有抑制油菜生长初期磷素累积的作用,氯化铵处理抑制作用最突出,其次是尿素,再次是硫酸铵、硝酸铵和硝酸钙处理;油菜生长后期不同形态氮肥处理均逐渐显著促进油菜的磷累积,但氯化铵处理的促进作用仍然低于其它氮肥处理,这与不同形态氮肥处理对油菜生长的影响较一致。土壤有效磷含量受不同形态氮肥处理影响较小,而水溶性磷含量因施用不同形态氮肥均表现显著地下降,氯化铵和硫酸铵处理使土壤水溶性磷下降较多,硝酸铵、硝酸钙和尿素处理使土壤水溶性磷下降较少。The effects of different form nitrogen on phosphorus fertilizer bioavailability in calcareous soil were investigated in a pot experiment.The results indicated as follows.At the initial stages,all form nitrogen restrained phosphorus uptake of the rape,firstly the NH_4Cl treatment,secondly the urea,finally the (NH_4)_2SO_4 , NH_4NO_3 and Ca(NO_3)_2 treatment.But as time went by,the phosphorus uptake increased significantly,which were similar to those effects on the dry matter production.Different form of nitrogen influenced soil available phosphorus little, but influenced soil solution phosphorus greatly.All forms of nitrogen made the amount of phosphorus secreased.The effects of NH_4Cl and (NH_4)_2SO_4 treatment were comparatively greater,while those of NH_4NO_3, Ca(NO_3)_2 and Urea comparatively less.

关 键 词：形态 氮肥 磷肥 有效性 

分 类 号：S143.1[农业科学—肥料学] S565.401[农业科学—农业基础科学]