Difference evaluation of three kinds of root of Aconitum carmichaelii in Sichuan based on UPLC analysis of six alkaloids and chemometrics Effects of microelements fertilizer ratio on growth of aconite daughter root Effects of microelements fertilizer ratio on growth of aconite daughter root Studies on the Formation of Prepared Daughter Root of Common Monkshood Fine root order morphology and proportion between mother roots and daughter roots in Fraxinus mandshurica and Larix gmelinii plantations