黄兰清, 王晓明, 吴丽君, 等. 配方施肥对‘紫精灵’紫薇容器苗生长及养分积累的影响[J]. 西南林业大学学报（自然科学）, 2023, 43(5): 31–38 . DOI: 10.11929/j.swfu.202206043
引用本文: 黄兰清, 王晓明, 吴丽君, 等. 配方施肥对‘紫精灵’紫薇容器苗生长及养分积累的影响[J]. 西南林业大学学报（自然科学）, 2023, 43(5): 31–38 . DOI: 10.11929/j.swfu.202206043
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Huang Lanqing, Wang Xiaoming, Wu Lijun, Tang Li, Zeng Huijie, Li Yongxin, Cai Neng. Effects of Formula Fertilization on Container Seedling Growth and Nutrient Accumulation of Lagerstroemia indica 'Zijingling'[J]. Journal of Southwest Forestry University, 2023, 43(5): 31-38. DOI: 10.11929/j.swfu.202206043
Citation: Huang Lanqing, Wang Xiaoming, Wu Lijun, Tang Li, Zeng Huijie, Li Yongxin, Cai Neng. Effects of Formula Fertilization on Container Seedling Growth and Nutrient Accumulation of Lagerstroemia indica 'Zijingling'[J]. Journal of Southwest Forestry University, 2023, 43(5): 31-38. DOI: 10.11929/j.swfu.202206043
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配方施肥对‘紫精灵’紫薇容器苗生长及养分积累的影响

Effects of Formula Fertilization on Container Seedling Growth and Nutrient Accumulation of Lagerstroemia indica 'Zijingling'

    摘要
  • 摘要: 以2年生‘紫精灵’紫薇容器苗为试验材料，采用“3414”施肥试验方案，设置氮、磷、钾3因素，每个因素4个水平，共14个处理，研究不同处理对‘紫精灵’紫薇生长及养分积累的影响，并建立株高总增长量与氮、磷、钾肥料效应模型，使用频次分析法优化肥料效应方程模型，得到优化的施肥量，为‘紫精灵’紫薇的科学施肥提供理论指导和技术支持。结果表明：1）T6（N2P2K2）处理的生长指标表现最佳，其株高总增长量、冠幅总增长量、花序长与宽及花径分别较不施肥处理（T1）增加了69.04%、24.16%、92.30%、65.57%、20.01%，差异显著。2）叶片全氮、全磷、全钾含量均分别随着氮、磷、钾施肥量的增加而增加。3）拟合的氮、磷、钾肥施用量与株高总增长量的肥料效应模型的相关性达到极显著水平，模型拟合成功；使用频次分析法优化肥料效应模型，得出本研究的基质配比下‘紫精灵’紫薇株高总增长量达39.09 cm以上时的肥料施用量为N：13.70～17.60 g/株、P2O5：6.62～8.60 g/株、K2O：7.25～9.12 g/株。综合考虑环保及肥料经济效益等因素，在培育‘紫精灵’紫薇容器苗时可选用频次分析法得出的施肥方案，该方案能显著促进幼苗快速生长。

     

    Abstract: Two-year-old container seedlings of Lagerstroemia indica 'Zijingling' were used as experimental materials, and the '3414' fertilization experiment scheme was adopted, with the setting of three factors: nitrogen, phosphorus and potassium, and 4 levels of each factor, a total of 14 treatments. The effects of different treatments on the growth and nutrient accumulation of L. indica were studied, and the model of total increase of plant height and fertilizer effect of N, P and K was established. The fertilizer effect equation model was optimized by using frequency analysis method, and the optimized fertilizer application rate was obtained, which provided theoretical guidance and technical support for scientific fertilization of L. indica. The results can be seen as follows: 1) T6 (N2P2K2) had the best growth index, with the total increase of plant height, total increase of crown width, inflorescence length and width and flower diameter increased by 69.04%, 24.16%, 92.30%, 65.57% and 20.01%, respectively, compared with the treatment without fertilization (T1); 2) The contents of total nitrogen, total phosphorus and total potassium in leaves increased with the increase of fertilizer application rate of nitrogen, phosphorus and potassium, respectively; 3) The correlation between the fitted fertilizer effect model of nitrogen, phosphorus and potassium application rates and the total increase of plant height reached a highly significant level, indicating that the model fitting was successful; the frequency analysis method was used to optimize the fertilizer effect model, and it was concluded that the fertilizer application rate of L. indica under the matrix ratio of this study was N: 13.70−17.60 g/plant, P2O5: 6.62−8.60 g/plant, K2O: 7.25−9.12 g/plant when the total increase of plant height was more than 39.09 cm. With the factors of environmental protection and economic benefits of fertilizer put into consideration, the fertilization scheme obtained by frequency analysis method can be selected amid the cultivation of container seedlings of L. indica, which can significantly promote the growth of seedlings in a rapid manner.

     

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