不同水氮调控对玉米农艺性状及产量的影响

Effect of Different Water and Nitrogen Supply on Yield and Agronomic Characters of Maize

通过不同水氮调控对旱棚栽培玉米的农艺性状和产量的影响研究表明,水分胁迫条件下,较正常施氮量,氮胁迫有增产趋势;而水分相对充足情况下,氮胁迫相对减产,但不显著;在水分充足的条件下,氮肥对株高和叶面积起促进作用;水分对干物质积累的作用高于氮肥;氮肥可以促进根系对土壤水分的吸收,适当的干旱可以促进植株根系发育;水氮双重胁迫下根系衰老最为严重。

Effect of different water and nitrogen supply on yield and agronomic characters of maize was studied under controllable rain-protected shed.The results showed that low nitrogen stress increased yield of maize compared with control under water stress condition.While low nitrogen stress decreased yield of maize under sufficient water condition,but not significantly.Nitrogen fertilizer increased plant height and leaf area under sufficient water condition.Effect of water on dry matter accumulation was higher than that of nitrogen.Nitrogen promoted absorption of soil water in root,and the root grew well under proper drought condition.The root system aged seriously under combined stress of drought and nitrogen.