摘要
采用田间试验的方法,研究了不同氮肥形态对氮素在马铃薯不同器官中的吸收和运转分配及产量的影响。试验结果表明:铵态氮肥对马铃薯地上干物质积累量的增加作用最明显,施氮处理马铃薯块茎干物质积累量比对照增加50.37%～71.38%;马铃薯各器官中含氮量随生育期推进逐渐下降,其中,茎和叶下降幅度较大;马铃薯各器官中氮含量生育前期表现为叶片>地上茎>根,进入块茎形成期以后,则叶片>根>地上茎>块茎。施氮在马铃薯生育前期有利于茎对氮素的吸收和储存,后期又可以促进茎中的氮素向叶片和块茎转移。施氮各处理产量较对照增加19.28%～63.86%,NH4+-N处理对氮的吸收、积累与分配影响最大,且产量最高,达到39 410.2 kg.hm-2。
The effect of nitrogen forms on N uptake,translocation and distribution in organs and yield of potato was studied in field experiments.The results showed that ammonium nitrogen fertilizer had the most remarkable increasing effect on potato upland dry matter accumulation;Compared with CK,potato tuber dry matter accumulation was increased from 50.37% to 71.38% by nitrogen treatments;Organs nitrogen content was decreased gradually with growing time,which stem and leaf was decreased in large amplitude.During the earlier growing stage,leaves and shoots reduced a little larger than roots for the nitrate content of different plant tissue,and it manifested as leavesrootsstemstubers after tuber initiation stage.Nitrogen treatment was beneficial to N absorption and storage in stems during the earlier growing stage,and it could promote N transfer to leaves and tubers later.Nitrogen treatments increased potato yield by 19.28%~63.86%,among which ammonium nitrogen fertilizer had the most influential effect in N absorption,accumulation and distribution,and its yield was the highest,which reached 39 410.2 kg·hm-2.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2012年第2期39-44,共6页
Soil and Fertilizer Sciences in China
基金
黑龙江省科技厅重大项目(GA06C101)
黑龙江省农垦总局重点项目(HNK11A-05-10)
黑龙江省研究生创新科研重大项目(YJSCX2011-270HLJ)
关键词
氮肥形态
氮积累
氮分配
产量
马铃薯
nitrogen forms
nitrogen accumulation
nitrogen distribution
yield
potato
作者简介
焦峰（1980-），男，在读博士研究生，助理研究员，主要从事土壤肥力和作物营养生理研究。
翟瑞常 通讯作者。
