| pH、氮素形态和Ca2+对玉米幼苗根系发育的影响 |
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| 引用本文： | 杨丽琴,夏小燕,汪晓丽,司江英,封克.pH、氮素形态和Ca2+对玉米幼苗根系发育的影响[J].扬州大学学报(农业与生命科学版),2007,28(4):47-51. |
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| 作者姓名： | 杨丽琴 夏小燕 汪晓丽 司江英 封克 |
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| 作者单位： | 1. 扬州大学,环境科学与工程学院,江苏,扬州,225009;常州轻工职业技术学院,江苏,常州,213164
2. 扬州大学,环境科学与工程学院,江苏,扬州,225009 |
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| 基金项目： | 国家自然科学基金资助项目(30270783) |
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| 摘 要： | 通过设定不同pH、氮素形态、外源Ca2 浓度,观察玉米植株根系在水培营养液中的发育情况。结果表明:硝态氮(NO3--N)可促进玉米植株侧根的生长和生物量的积累,而铵态氮(NH4 -N)处理的植株根平均直径大于NO-3-N处理。NH4 -N的毒害可能是较高浓度的NH4 取代细胞膜上的Ca2 ,从而破坏细胞膜结构。增加外源Ca2 浓度,可在一定程度上缓解H 和NH4 对玉米根发育的抑制作用。
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| 关 键 词： | 玉米 pH 氮素形态 钙 根系发育 |
| 文章编号： | 1671-4652(2007)04-0047-05 |
| 修稿时间： | 2006年12月10 |
Effects of pH levels, nitrogen forms and calcium ion on root development of maize seedlings |
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| YANG Li-qin,XIA Xiao-yan,WANG Xiao-li,SI Jiang-yin,FENG Ke.Effects of pH levels, nitrogen forms and calcium ion on root development of maize seedlings[J].Journal of Yangzhou University:Agricultural and Life Science Edition,2007,28(4):47-51. |
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| Authors: | YANG Li-qin XIA Xiao-yan WANG Xiao-li SI Jiang-yin FENG Ke |
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| Abstract: | This paper investigated the growth and development of maize roots treated with different pH levels,nitrogen forms(ammonium and nitrate) and Ca2 supply in nutrient solution.The results showed that with NO-3-N more lateral roots were observed and seedlings accumulated more biomass.The seedlings supplied NH 4-N as nitrogen nutrition had bigger average diameter of roots than that supplied NO-3-N.The reason of NH 4 toxity may be that NH 4 with high concentration replaced Ca2 in cell membrane,and furthermore the structure of cell membrane was damaged.Adding calcium into the nutrient solution reduced the negative effects of H and NH 4-N on the growth and development of maize roots. |
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| Keywords: | maize pH nitrogen form calcium roots develoment |
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