EFFECT OF HARVEST DATES, MYCORRHIZA AND SOME BIOSTIMULANTS ON SOME CHARACTERISTICS VEGETATIVE AND ROOT GROWTH AND SOME COMPONENTS OF VOLATILE OIL FROM THE ACTIVE COMPOUNDS IN THE SWEETSCENTED GERANIUM PLANT(Pelargonium Graveolens L.HERIT)⃰

Abstract

The experiment was carried out in one of the fields of Research Station B at the College of Agricultural Engineering Sciences / University of Baghdad - Al-Jadiriya on the fragrant plant for the spring season 2021 in order to study the effect of harvest date, mycorrhiza, biostimulants and the interaction between them on some characteristics of vegetative and root growth and the essential oil yield of sweet scented geranium plants from some compounds Medically effective. The experiment was carried out according to a randomized complete block design (RCBD) with a split plot design, with three replications. The experiment included a study of three factors, as the factor of harvest dates represents the main panels with two harvest dates, which are after 60 and 90 days from planting, while the secondary panels include the treatment of mycorrhizal fungal vaccine by two treatments, namely, not adding mycorrhizal fungal vaccine to the root system and adding it. As for the sub-secondary panels,they include Thestimulation treatments consisted of four treatments: the measurement treatment and the spraying of the foliage with the amino acid phenylalanine at a concentration of 300 mg l̄¹. And the treatment of spraying the foliage with moringaleaves extract at a concentration of 10 gm l̄̄ and the treatment of spraying the shoot with licorice root powder extract at a concentration of 10 gm l̄̄. The results that were reached showed: The treatment exceeded the date of the second harvest in most of the vegetative growth indicators, which included plant height (54.62 cm), leaf area (48.76 cm2) and the content of soft leaves of total chlorophyll (10.04 mg 100 g-1 and leaf yield of wet weight) 550.4 g) and the dry weight of leaves (96.9 g), as well as an increase in the surface area of ​​the roots (40.50 dm 2) and the volatile oil content in the dried leaves from the percentage of each of Citronellal (24.86%) and Geraniol (15.58%) and Linalool (5.97%) The application of mycorrhizae significantly increased all vegetative growth characteristics such as plant height (53.67 cm), total number of leaves per plant (374.3 leaves), leaf area (51.46 dm2) and the content of fresh leaves of total chlorophyll (10.39 mg 100 mg - 1) The weight of the fresh yield of the leaves (539.6 g), the weight of the dry yield of the leaves (98.2 g), the surface area of ​​the roots (54.83 dm 2), as well as the volatile oil content of the dried leaves from the percentages of each of Citronellal (23.59%) and Geraniol (14.89). %) and Linalool (5.07%) spray treatment showed Foliar with Moringa leaf extract an increase in the total number of leaves (384.8 leaves), the leaf area (58.23 dm2), the content of the fresh leaves of total chlorophyll (11.04 mg 100 g-1), the fresh weight of the leaf yield (104.3 g) and the dry weight of the leaf yield (54.67 g) and the area The surface surface of the roots (58.23 dm 2) the content of volatile oil in the dried leaves as a percentage of each of the compound Citronellal (23.35%), Geraniol (14.92%) and Linalool (4.89%).