Effects of different organic fertilizers on anatomical structure and hydraulic characteristics of the grape root systems
This experiment explores the application effects of different organic fertilizer combinations on grape growth,providing a theoretical basis for scientific fertilization in vineyards.This study used'Ballado Red'and'Shine Muscat'grapes on SO4 rootstock as materials.Four treatments were applied:A:pig dung(40 kg);B:cow dung(13 kg),sheep dung(13 kg),pig dung(14 kg);C:cow dung(26.5 kg),sheep dung(13.5 kg);D:cow dung(20 kg),sheep dung(20 kg).The differences in root anatomical structure and hydraulic properties were observed using the paraffin section method.The results showed that the root pericarp thickness of treatments B,C and D was lower than that of treatment A,with treatment D having the lowest value.The root vascular cambium thickness,phloem radius,xylem radius,xylem average vessel maximum diameter,minimum diameter,and average vessel area of treatments B,C and D were higher than those of treatment A,with the increase in treatment D being the most significant.The root specific water conductivity and embolism vulnerability index of treatment D were the highest,followed by treatments C and B,with treatment A having the lowest values.That all,reasonable application of organic fertilizer can significantly increase the xylem radius and phloem thickness of roots,promote root thickening and growth,increase xylem tube diameter,improve root specific water conductivity,and enhance the absorption and utilization of soil water and nutrients by roots.Principal component analysis indicated that the best fertilization treatments for grape root growth were 20 kg cow manure and 20 kg sheep manure(treatment D).
万方数据
维普
