The influence of fertilizers and biostimulators on the quality and quantity production of winter wheat

In 2008-2009 and 2009-2010 crop years an experience took place at the Ezăreni-Iaşi farm in where it was intended measured the effect of chemical fertilizer and biostimulators on yield and protein content on winter wheat grain, Boema variety. On average for the two agricultural years, first place it was occupied by fertilized with N90P90K90 variant, which to obtained 6588 kg/ha, followed by dose N60P60K60 with 6524 kg / ha, the differences from unfertilized variant being very significant. Applying BCO 4K biostimulator, the production growth was only 24 kg/ha, and to the BCO2K biostimulator application, decreased by 129 kg/ha, the differences were not statistically assured. The influence of fertilization on the protein content averaged over the two years highlight, the dose of N160P90K90, at which the protein content of wheat grain was 14.5%. It can be observed that increasing the doses of applied fertilizers, can be increase the protein content of grain

Influence of foliar fertilisers on biochemical and physiological properties in Nepeta racemosa Lam.

The purpose of this study was to evaluate some elements of physiology and biochemistry in Nepeta racemosa Lam. in the pedo-climatic conditions of the Moldavian forest steppe. The parameters were quantified under conditions of differentiated fertilisation with three foliar products (KSC 1, KSC 2, and Corona K). Biochemical analysis by GC/MS revealed the highest concentration of the following components: nepetallic acid (Untreat - 54.33%, KSC 1 - 55.50%, KSC 2 - 56.90%, Corona K - 53.77), eucalyptol (Untreat . 9.87%, KSC 1 - 10.70%, KSC 2- 12.80%, Corona K - 10.78%), 3-hydroxy- (4S, 4aS, 7S, 7aS)-dihydronepetalactone (Untreat - 5.87%, KSC 1 - 5.37%, KSC 2 - 4.87, Corona K - 3.67%), and (4aS, 7S, 7aS)-trans, cis-nepetalactone (Untreat - 4.30%, KSC 1 - 5.00%, KSC 2 - 4.20%, Corona K - 5.23%). Polyphenols were present in large quantities in the Corona K variant, with 33.1 mg GA/g dw at the first harvest and 27.88 mg GA/g dw at the second harvest. The highest concentration of flavonoids was identified in the Corona K variant (26.34 mg QE/g dw - first harvest and 56.77 mg QE/g dw - second harvest). The antioxidant activity was between 14.76 and 38.54% at the first harvest, and from 12.18 to 22.95% at the second harvest. Chlorophyll pigments ranged from 13.12- 17.68 μg/ml-1 for chlorophyll a, 5.43-9.66 μg/ml-1 for chlorophyll b, and 2.07-3.34 μg/ml-1 for carotenoids. The highest grass production per m2 was achieved in the version fertilised with KSC 1 for both crops, with 986.66 g/m2 for the first harvest and 861.33 g/m2 for the second. Iridoids are a class of substances that are commonly used for pesticide role. The study aims to highlight these substances and determine whether differentiated fertilization influences. The presented data confirm the results in the literature for polyphenols and flavonoids, but also present chemotypic novelties in terms of chemical composition and represent a direction to follow for future research

Studies regarding the influence of some phenotypic parameters on raw material’s quality of different genotypes from Mentha genus

Peppermint (Mentha sp.) is one of the most cultivated medicinal plant worldwide due to its diverse range of products in which it can be used. The main natural product (Herba Menthae) is used in pharmaceutical industry, as an additive and flavor in food industry and the extracted essential oil is used in numerous cosmetic and selfcare products. This study’s purpose is to quantify a series of biometrical and physiological elements of some species which pertain to Mentha genus from USAMV’s “Collection of Medicinal Plants”, which influence the raw material’s quality and the quantity of essential oils. The studied mint species are Mentha viridis var. crispata (Schrod) Beck Ecotype 2, Mentha longifolia (L.) Hudson Ecotype 2, Mentha spicata var. viridis L., Mentha longifolia (L.) Hudson Ecotip 1, Mentha viridis var. crispata (Schrod) Beck Ecotype 1. The study followed the influence of the leaf surface, the content of chlorophyll pigments, but also the total leaf number on the production of volatile oil. Being a very important parameter in the reception and estimation of needed quantity of raw material, drying efficiency was determined for each cultivar. The highest amount of volatile oil was obtained from two ecotypes of the Mentha viridis var. crispata (Schrod) Beck species, in a percentage of 0.54% and 0.58%, and the lowest amount from Mentha longifolia (L.) Hudson Ecotype 2. The results are showing that the quantity of volatile oil is influenced by the leaf surface, especially by the basal leaves. It is being proved that the amount of the volatile oil is influenced by the leaf surface, its placement and the chlorophyll pigments content and the cultivar factor, in the same environmental conditions