| 铵态氮与硝态氮配比对落叶松幼苗生长的影响 |
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| 引用本文： | 刘春娜,崔晓阳,郭亚芬,郑红. 铵态氮与硝态氮配比对落叶松幼苗生长的影响[J]. 东北林业大学学报, 2011, 39(1): 28-30 |
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| 作者姓名： | 刘春娜 崔晓阳 郭亚芬 郑红 |
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| 作者单位： | 东北林业大学,哈尔滨,150040 |
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| 摘 要： | 以兴安落叶松幼苗为研究材料,采用水培试验方法,研究不同NH+4-N与NO-3-N配比对落叶松幼苗生长的影响.结果表明,落叶松幼苗在以NH+4-N为主的营养液中生长较好.营养液中NO-3-N比增加,则幼苗生长下降,过量的NO-3-N可抑制幼苗根系生长,降低幼苗的地下部与地上部干质量比.营养液中NH+4-N的比例增加,植株...
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| 关 键 词： | 落叶松(Larix gmelinii)幼苗 铵态氮 硝态氮 养分 介质pH值 |
Effects of Different Ratios of NH_4~+ -N/NO_3~- -N on Growth of Larix gmelinii Seedings |
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| Liu Chunna,Cui Xiaoyang,Guo Yafen,Zheng Hong. Effects of Different Ratios of NH_4~+ -N/NO_3~- -N on Growth of Larix gmelinii Seedings[J]. Journal of Northeast Forestry University, 2011, 39(1): 28-30 |
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| Authors: | Liu Chunna Cui Xiaoyang Guo Yafen Zheng Hong |
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| Affiliation: | Liu Chunna,Cui Xiaoyang,Guo Yafen,Zheng Hong(School of Forestry,Northeast Forestry University,Harbin 150040,P.R.China) |
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| Abstract: | An experiment was conducted to study the effects of NH4+ -N,NO3- -N and their different supply ratios on the growth of Larix gmelinii seedlings by water culture system in greenhouse.Results showed that L.gmelinii seedlings grew better at higher NH+4-N concentration.The growth of seedlings declined with increasing ratio of NO3- -N.Excessive NO3- -N inhibited root growth and the root/shoot ratio of the seedlings significantly decreased as the NH4+ -N/NO3- -N ratio was over 75%.Increasing NH4+ -N ratio in nutr... |
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| Keywords: | Larix gmelinii seedlings NH4 -N NO3--N Nutrients pH value of medium |
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