腐植酸水溶肥对枇杷幼苗养分吸收的影响

Effects of Humic Acid Water-soluble Fertilizer on Nutrient Absorption of Loquat Seedlings

    摘要
  • 摘要:
    目的 探究喷施腐植酸水溶肥对枇杷幼苗生长及养分吸收的影响，筛选出能够促进枇杷幼苗生长和养分吸收的浓度。
    方法 采用盆栽试验，以‘大五星’枇杷幼苗为材料，以喷施清水为对照，比较喷施不同稀释倍数（1600、1300、1000和700倍液）腐植酸水溶肥后枇杷幼苗生物量和养分吸收数量。
    结果 喷施适宜浓度腐植酸水溶肥有助于提高枇杷幼苗根系、地上部分的生物量、全氮、全磷和全钾含量，促进对氮、磷、钾的吸收和转运，提高其转运效率和转运贡献率。所有浓度处理对枇杷幼苗根系和地上部分的氮、磷、钾收获指数均无显著影响。灰色关联度分析表明枇杷幼苗生物量与全氮、全磷、全钾含量密切相关。
    结论 枇杷幼苗期推荐施用996 ~ 1154倍液腐植酸水溶肥（腐植酸 ≥ 40 g L−1，N + P2O5 + K2O ≥ 350 g L−1）。

     

    Abstract:
    Objective The aims were to explore the effects of spraying humic acid water-soluble fertilizer on the growth and nutrient absorption of loquat seedlings, and to screen out the suitable concentrations of this water-soluble fertilizer for loquat growth.
    Method The different dilutions (1600, 1300, 1000, and 700 times) of humic acid water-soluble fertilizer were sprayed on the loquat seedlings 'Dawuxing' with pot experiment, and the biomass and nutrient absorption of loquat seedlings were determined.
    Result Spraying appropriate concentration of humic acid water-suitable fertilizer increased the biomass, total nitrogen, total phosphorus and total potassium contents of loquat seedlings, wich promoted the absorption and transport of nitrogen, phosphorus and potassium, and improved its transport efficiency and transport contribution rate. Compared with the control, all concentration treatments had no significant effect on the nitrogen, phosphorus and potassium harvest indices of loquat seedling roots and aboveground parts. Grey correlation analysis showed that the biomass of loquat seedlings was closely related to the contents of total nitrogen, total phosphorus and total potassium.
    Conclusion It is recommended to apply 996 to 1154-fold dilution humic acid water-soluble fertilizer ( humic acid ≥ 40 g L−1, N + P2O5 + K2O ≥ 350 g L−1 ) in loquat seedling stage.

     

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