淹水条件下不同氮肥对水稻土中磷肥转化的动态影响  

Effect of different nitrogen fertilizers on dynamic transformation of phosphorus fertilizer in paddy soil under flooding condition

作　　者：于飞[1] 周健民[1] 王火焰[1] 陈小琴[1] 杜昌文[1] 

机构地区：[1]土壤与农业可持续发展重点实验室/中国科学院南京土壤研究所,江苏南京210008

出　　处：《中国土壤与肥料》2006年第6期29-32,共4页Soil and Fertilizer Sciences in China

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

摘　　要：利用室内土培试验研究了淹水条件下不同氮肥对水稻土(黄泥土)中磷肥转化的动态影响。结果表明,培养1 d时,不同氮肥对土壤有效磷含量无显著影响,但显著降低土壤的水溶性磷含量;之后,硝酸铵和硝酸钙处理显著增加土壤有效磷和水溶性磷含量;氯化铵和硫酸铵处理表现降低土壤水溶性磷含量的作用,而对土壤有效磷含量仍无显著影响;尿素处理15 d和35 d时有增加土壤有效磷和水溶性磷含量的作用,而70 d和105 d时土壤有效磷和水溶性磷含量与对照处理差异不大。The effect of different nitrogen fertilizers on dynamic transformation of phosphorus fertilizer in paddy soil under flooding condition was studied in indoor incubation experiments. The results showed that all nitrogen fertilizers hardly influenced soil available phosphorus on the first day incubation, while greatly reduced soil solution phosphorus. And then, the NH4NO3 and Ca （NO3）2 treatments increased both soil available and solution phosphorus notably, and the NH4Cl and （NH4）2SO4 treatments decreased soil solution phosphorus a little, affected soil available phosphorus little. And to the urea treatment, both soil available and solution phosphorus were increased on the fifteenth and thirty - fifth day incubation, and had little difference from the control on the seventieth and one hundred and fifth day incubation.

关 键 词：氮肥 磷肥 转化 水稻土 淹水 

分 类 号：S143[农业科学—肥料学]