摘要： 通过基质盆栽冬小麦,研究了氮硫交互作用对小麦苗期生长及养分吸收的影响.研究结果表明,氮、硫对苗期小麦的生长都有一定影响,氮的增产效果远大于硫,当氮肥用量为200 mg/盆时,小麦生物量的最大增产幅度89%;在低氮水平下,硫肥的增产效果最佳,最高可增产12%.硫肥的施用可以提高苗期小麦植株体内硫的累积量,在氮素胁迫的情况下最为显著,可提高1倍以上;同时降低植株体内氮的累积,但降低幅度不大.氮素充足时,地上部与地下部生物量之比为2.～3.9,氮素胁迫条件下,小麦的地上部和地下部的生物量相当,说明氮素养分不足时,小麦合成的有机物质更倾向于分配给根系,促进根系的生长,这可能是小麦抵抗胁迫环境条件的生理机制之一.

关键词: 氮, 硫, 冬小麦, 苗期

Abstract: Effect of interaction between nitrogen and sulfur on wheat growth during seedling stage and its nutrient uptake was studied.The result showed that both nitrogen and sulfur affected wheat growth.The wheat yield was increased by 89% while 200 mg nitrogen applied perpot at the same sulfur level.At low nitrogen level,sulfur had the best effect on wheat growth and in creased sulfur concentration in the wheat plant.The application of sulfur also caused a little decrease of nitrogen concentration in the wheat plant.When available nitrogen was enough,wheat plant yield of aerial part was 2.4~ 3.9 times as that of roots.The wheat plant yield of aerial and roots were nearly equal.It accounted for that under nitrogen dress condition more dry-matterpartitioned to roots to promote root growth and to advance root resistance to bad conditions.

Key words: Nitrogen, Sulfur, Wheat , Seedling period

中图分类号: 

• S512.1