| 不同pH和氮素形态对作物幼苗生长的影响 |
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| 引用本文： | 司江英,汪晓丽,陈冬梅,封克.不同pH和氮素形态对作物幼苗生长的影响[J].扬州大学学报(农业与生命科学版),2007,28(3):68-71. |
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| 作者姓名： | 司江英 汪晓丽 陈冬梅 封克 |
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| 作者单位： | 扬州大学,环境科学与工程学院,江苏,扬州,225009 |
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| 摘 要： | 在pH 4.0和6.0的条件下研究铵态氮(NH4 -N)和硝态氮(NO3--N)对玉米、白羽扇豆、水稻和小麦幼苗生长的影响。结果表明:不同介质pH和氮素形态均能对玉米、白羽扇豆、水稻和小麦幼苗的干物质积累和体内的分布产生影响。就玉米而言,不论供应何种形态的氮素,低pH均明显有利于干物质的积累,但低pH条件下NH4 -N最不利于小麦干物质积累;而对水稻来说,低pH条件下供应NO3--N最不利于干物质积累。pH 6.0条件下玉米、白羽扇豆和小麦3种植物均显示出较大的根冠比,表明较高的pH条件有助于同化产物向根部的运输和在根部的积累。
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| 关 键 词： | 玉米 NH4 -N NO3--N pH 干物质积累 |
| 文章编号： | 1671-4652（2007）03-0068-04 |
| 修稿时间： | 2007-01-10 |
Effects of NH+4-N and NO-3-N on crop seedling growth under different pH levels |
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| SI Jiang-ying,WANG Xiao-li,CHEN Dong-mei,FENG Ke.Effects of NH+4-N and NO-3-N on crop seedling growth under different pH levels[J].Journal of Yangzhou University:Agricultural and Life Science Edition,2007,28(3):68-71. |
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| Authors: | SI Jiang-ying WANG Xiao-li CHEN Dong-mei FENG Ke |
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| Institution: | Coll of Environ Sci and Engin , Yangzhou Univ , Yangzhou 225009, China |
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| Abstract: | Solution culture experiments were carried out to study the effects of different pH levels(pH 4.0,6.0) and N sources(NH 4-N,NO-3-N) on crop seedling growth.Maize,white lupin,rice and wheat were used in the experiment.Results showed that different pH and N forms could affect both accumulation of dry matter and its distribution between shoots and roots.In terms of maize,lower pH obviously increased the accumulation of dry matter.However,lower pH made wheat accumulate least dry matter,and coexistance of lower pH and NO3-N decreased the dry matter accumulation of rice.It was interesting that all of 4 plants used in this experiment showed relatively larger ratios of root to shoot under pH 6.0,namely higher pH was favorable to transfermation of assimilates from aerial parts to roots and to their accumulation in roots. |
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| Keywords: | maize NH 4-N NO-3-N pH dry matter accumulation |
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