Effects of Chemical and Biofertilizers on Yield and Production Factors of Valerian (Valeriana officinalis L.)

A field experiment was conducted to evaluate the effects of bio and chemical fertilizers on yield and production factors of valerian (Valeriana officinalis L.) at the Homad-Absard Agricultural Complex in Damavand city, Tehran Province, Iran, through a factorial experiment based on a randomized complete blocks design with ۳ replications during ۲۰۱۷ to ۲۰۲۰. Experimental factors consist Nitroxin and Phosphate Barvar۲ biofertilizers each with ۲ levels of inoculation and control, and also the urea (۴۶% N) chemical fertilizer in ۵ levels (۰, ۳۰, ۶۰, ۹۰ and ۱۵۰ kg/ha). Measured parameters were root diameter (mm), root length (cm), leaf width (cm) and leaf length (cm) root dry weight (kg/ha), shoot dry weight (kg/ha), valernic acid content (%) and valernic acid yield (g/ha). Results showed that the biofertilizers had significant effect (p≤ ۰.۰۱) on the all quantity and quality parameters studied. Unlike the urea chemical fertilizer at all levels which had a negative effect on the yield and amount of valernic acid (%), biofertilizers increased it. Maximum and minimum amount of valernic acid (%) were measured in control (۰.۴۶۵%) and ۱۵۰ kg/ha urea (۰.۲۱۵%) respectively. The highest and lowest root dry weight were obtained in interaction of Nitroxin+Phosphate barvar۲ + ۱۵۰ kg urea (۶۶۵ kg/ha) and control (۲۲۱ kg/ha) respectively. Results of this experiment showed that biofertilizers with positive effects on experimental parameters are able to replace the chemical fertilizers.

کلیدواژه ها:

Biofertilizer ، Medicinal plants ، Plant nutrition ، Root yield ، Valernic acid