红皮云杉、油松幼苗根系对NH_4~+/NO_3~-施肥的形态响应Morphological Response of Picea koraiensis and Pinus tabuliformis Root to Different NH_4~+/NO_3~- Fertilization
孙凯;柴源;腰政懋;徐程扬;
摘要(Abstract)：
[目的]采用红皮云杉和油松作为试验材料,研究它们的根系形态对不同NH4+/NO3-施肥的响应。[方法]设树种和不同NH4+/NO3-比例施肥处理2因子,采用完全随机区组设计,选取根系长度、表面积和体积3个指标进行分析。[结果]红皮云杉、油松NH4+/NO3-(1/4处理)使其根系生长趋势变得平稳。90 d后,油松1/4处理根系长度300.8 cm,表面积43.6 cm2,体积0.784 cm3,显著优于其他处理。而红皮云杉各处理间差异不显著。比根长和比根面积数据表明4/1处理使得2种树种吸收效率最高,1/4处理最低,但差异不显著。[结论]为深入研究温室育苗中针叶树种对不同氮形态比例的需求规律,实现其快速生长提供了依据。
关键词(KeyWords)： 红皮云杉;油松;NH4+/NO3-;根系形态
基金项目(Foundation):
作者(Author): 孙凯;柴源;腰政懋;徐程扬;
Email:
DOI: 10.13989/j.cnki.0517-6611.2012.13.140
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