施肥对土壤硝态氮含量及分布的影响及合理施肥研究  

Effcet of Applying Fertilizer on Content and Distribution of NO_3^--N in Chao Soil and Reasonable Fertilzer Application

作　　者：黄绍敏[1] 张鸿程[1] 宝德俊[1] 皇甫湘荣[1] 

机构地区：[1]河南省农科院土肥所,河南郑州450002

出　　处：《土壤与环境》2000年第3期201-203,共3页Soil and Environmental Sciences

基　　金：农业部重点科研计划"高新技术与基础研究"项目!(95农-高科-17-03-02)

摘　　要：通过3 a 6季作物收获后测定不同施肥方式下潮土1 m土层中的硝态氮，结果表明无论是0～20 cm、80～100 cm还是0～100 cm土层，其硝态氮含量顺序均是N＞NK＞NP＞NPK＞SNPK＞MNPK；0～20 cm土层中硝态氮相对值随降雨量增大而减小，降水量大则硝态氮向下淋溶较多；施有机肥或秸秆还田有减轻淋溶的作用。0～60 cm土层中硝态氮相对值在测定时期及处理之间差异均不显著。The content of NO3--N in 0～100 cm Chao soil after harvest with different fertilizer treatment through 3 years were analyzed. The results indicated that the NO3--N content in 0～20 cm, 80～100 cm and 0～100 cm soil layers was decreased in the order: N> NK> NP> NPK> SNPK > MNPK. The NO3--N content in 0～20 cm layer decreased with precipitation, that was to say precipitation could accelerate NO3--N leaching down, but manure and straw could reduce the leaching. The percentage of NO3--N distributed in 0～60 cm soil layer varied little in different fertilizer treatments.

关 键 词：施肥方式 潮土 土壤硝态氮 合理施肥 

分 类 号：S147.2[农业科学—肥料学] S153.61[农业科学—农业基础科学]