干旱胁迫对玉米根系生长及根际养分的影响

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干旱胁迫对玉米根系生长及根际养分的影响

更新时间：2024-11-07

- 干旱胁迫对玉米根系生长及根际养分的影响
- Effect of Drought Stress on Root Growth and Rhizosphere Nutrients of Maize (Zea mays L.)
- 水土保持学报 2006年第3期页码：170-172
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  中国科学院科研项目
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- 纸质出版：2006
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干旱胁迫对玉米根系生长及根际养分的影响[J]. 水土保持学报, 2006,(3):170-172.

Effect of Drought Stress on Root Growth and Rhizosphere Nutrients of Maize (Zea mays L.)[J]. 2006, (3): 170-172.
干旱胁迫对玉米根系生长及根际养分的影响[J]. 水土保持学报, 2006,(3):170-172. DOI：

Effect of Drought Stress on Root Growth and Rhizosphere Nutrients of Maize (Zea mays L.)[J]. 2006, (3): 170-172. DOI：

摘要

通过盆栽模拟干旱试验，测定了干旱胁迫下玉米根系生长情况和根际土壤中速效N、P、K的含量。结果表明，干旱胁迫抑制了玉米拔节期和抽雄-开花期玉米根系的生长，减弱了玉米根系的吸收能力。干旱胁追下玉米根际NH4^＋-N、NO3^--N、速效P和速效K均发生根际富集现象。其中有效N和速效K含量高于正常供水．而速效P却呈现低于正常供水的趋势。干旱胁追抑制玉米根系生长、减弱根系吸收能力是玉米减产的重要原因。

Abstract

Root growth and available N

P and K in rhizospheric soil of maize were investigated with a pot experiment simulating drought stress.The results showed that drought stress restrained root growth of maize at jointing and tasseling-anthesis.The absorption area of maize root was decreased under drought stress.Soil NH~ _4-N

NO~-_3-N

available P and K were accumulated in rhizosphere of maize under drought stress

and soil available N and K were higher than normal water supply

but available P trended to lower than normal water supply.Root growth and absorption ability were weakened under drought stress

which were important reasons of the reduction of maize yield.

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