Evening primrose is a beautiful ornamental plant, but at
the same time it has medicinal properties that m ak e this plant of great
value and importan ce . In this context , the present resea rch ai ms to
investigat e the effect of phosphorus sources and biofertilizers (EM and
phosphorein) on growth, flowering, seeds yield, chemical constituents,
of Oenother a biennis L. plant . This study w as conducted at the
Experime nt al Farm and in the Laboratory o f Horticulture Dep artmen t ,
Faculty of Agric . at Moshtohor, Benha Univ., Egypt during 2018/ 2019
and 2019/ 2020 seasons. The results indicated that, plants which were
applied wit h phosphorus sources, biofertilizers as well as their
combination trea tments scored high ly signifi cant increases in all of
studied characteristics of vegetative, flowering , seeds yield , chemical
composition , fixed oil percentage , and fatty acids determin at i on of the
plant . The maximum values of most parameters mentioned above were
gained by the combined treatment of monopotassium phosphate with
EM in 1
st
and 2
nd
seasons. Additionally, the highest values of flowering
parameters and P % were recorded by MAP tr eatment combined with
phosphorein in both seasons . Furthe rmore , the highest seeds oil
percentage ( 27.22 and 28.3 7) were reco rded by the combined treatment
between monopotassium phosphate and phosphorein, in the first and
second s easons, respecti vely. The gained fixed oil composition four
com ponents were identified, i.e. palmitic acid, oleic acid, linoleic acid
and α -linolenic acid. It can be concluded that the monoamonium
phosphate (MAP) or monopotassium phosphate with EM or
phosphorein were the best for improving growth, seeds yield, fixed oil
productivity, chemical constituents and fixed oil compone nts of
Oenothera biennis L. plant . |
