摘要
在盆栽试验条件下,研究不同水平磷、硒交互作用及其对稻株生长和硒吸收累积的影响。结果表明:水稻土中施用一定量的硒,可促进稻株生长;施硒量过多,无论供磷量多少,植株均会受到伤害,生物量降低;供硒量增加,水稻中硒含量持续增加;硒在稻株各器官中含量由高到低依次为根、秸秆、糙米和糠。土壤施磷0.08 g·kg-1,秸秆中硒含量和累积总量低于对照,施磷量增加到0.40 g·kg-1,秸秆中硒含量和累积总量增加,分蘖期与对照差异显著;成熟期变化趋势与此相似,但差异不显著。
The interactions between phosphorus and selenium in paddy soil and its effect on the transfer of selenium from soil to rice were studied in greenhouse with three rates of phosphorus and selenium supplied respectively. The results showed that suitable rate of selenium supplied could promote the rice growth and excessive rate of selenium supply could decrease the biomass of rice regardless of phosphorus rates. The total selenium contents of shoot and root increased greatly with the increment of selenium supply. The order of selenium content in rice plant was root, straw, chaff and grain. The contents of selenium in straw supplied with 0. 08 g·kg-1P were lower than those of no phosphorus supply. With the increasing of phosphorus supplied to 0. 4 g·kg-1P, the contents of selenium in straw increased instead. The differences influenced by phosphorus rates were significant during tillering stage and were not obvious during mature period.
出处
《江苏农学院学报》
CSCD
2003年第4期67-70,共4页
Jiangsu Agricultural Research
基金
国家重点基础研究发展规划项目(973-G1999011802)
关键词
水稻
硒吸收
硒累积
磷
硒
交互作用
生长
phosphorus
selenium
paddy soil
interactions
selenium accumulation in rice
