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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。
The effects of different water and nitrogen control on agronomic traits and yield of maize cultivated in dryhouse were studied. The results showed that under the condition of water stress, compared with the normal nitrogen application, nitrogen stress had the tendency of increasing yield. However, when the water was relatively abundant, the nitrogen stress decreased, Nitrogen fertilizer could promote the accumulation of dry matter more than nitrogenous fertilizer. Nitrogen fertilizer could promote the uptake of soil moisture by the root system. Appropriate drought could promote the root development of the plant Under the dual water and nitrogen stress, root senescence is the most serious.