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[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。
[Objective] The research aimed to study the response of their root morphology to different NH4 + / NO3- fertilizers by using the red spruce and Pinus tabulaeformis as test materials. [Method] The tree species and different NH 4 + / NO 3 - fertilization treatments were set as 2 factors. The randomized block design was adopted. Three indexes of root length, surface area and volume were selected for analysis. [Result] The root growth of Picea koraiensis and Pinus tabulaeformis NH4 + / NO3- (1/4 treatment) became stable. After 90 days, the root length of Pinus tabulaeformis 1/4 was 300.8 cm, the surface area was 43.6 cm2 and the volume was 0.784 cm3, which was significantly better than other treatments. However, there was no significant difference between treatments of Picea koraiensis. The specific root length and specific root area data showed that the 4/1 treatment resulted in the highest absorption efficiency and the lowest 1/4 treatment for the two species, but the difference was not significant. [Conclusion] In order to further study the law of demand for coniferous species in greenhouse nursery to different proportion of nitrogen forms and provide the basis for their rapid growth.