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    A preliminary study on the comparison of inhibitory effects induced by PEG 6000 and Euphorbia hirta in two crop plants
    (Artvin Çoruh Üniversitesi, 2021) Qadır, Saira; Salam, Iram Us; Khan, Afsheen; Quereshi, Ijaz Ahmed
    Euphorbia hirta is commonly found in all tropical regions of the world, as invasive weed with an adverse effect on other plants. The current study features two important aspects: (i), Effects of E. hirta roots exudates (0, 50, 75 and 100% concentrations) (ii), Influence of PEG 6000 “Polyethylene glycol” (8, 16 and 40 g/l concentrations) on germination and growth criterion of Cicer arietinum (Chick pea) and Phaseolus vulgaris (French bean). In this regard osmotic potential of all the solutions have been balanced. It is observed that the root leachates of spurge weed significantly (p < 0.05) affected the germination rate while PEG has no positive or negative effect on growth activity. The growth parameters in both crops have altered by spurge weed and PEG solutions while highest inhibition was recorded in root length root exudates (3.5 cm) of C. arietinum which is in contrast to PEG (11.97 cm), this might be due to the presence of allelochemicals. The prescribed treatments also raised their pH values, where highest pH (7.9) obtained from 100% spurge weed induction which is relatively a stronger basic nature rather than neutral control samples. Comparative studies of both test crops shows that C. arietinum has appeared to be more influential than P. vulgaris. Two-way ANOVA has produced a significant difference (p < 0.05) between the effects of both treatments on germination and growth of test crops while within group (concentrations of each treatment) are weakly significant (p < 0.1) to each other. This would rather intimates that the inhibition has strongly emerged as an allelopathic response on Cicer arietinum and Phaseolus vulgaris plants by the induction of spurge weed (Euphorbia hirta) root exudates.
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    Variation in biomass production of sunflower (Helianthus annuus) plants under the influence of Lemongrass (Cymbopogon erectus) extract
    (Artvin Çoruh Üniversitesi, 2020) Asad, Muhammad; Khan, Afsheen; Jahan, Bushreen
    Plant extract is being used for crop yield and biomass enhancement since long time. Using plants extract for the enhancement of growth of other plant is a worthwhile strategy so as to enhance crop yield and crop biomass. Current study is an attempt to increase growth in sunflower plants using lemongrass foliar extract. For this purpose, various trials based on computer modeling have conducted. Pot experiment of sunflower plants has performed in greenhouse conditions that have irrigated by different concentrations of lemongrass extract. Results show that lower concentrations produced significant gain in biomass of crop i.e. greater fresh and dry weight was achieved by 1% samples (7.4±0.8mg and 2.0±0.3mg respectively) while lowest fresh and dry weight attained by 3% samples (2.5±0.2mg and 1.1±0.1mg respectively). Absolute growth rate (AGR) and Relative growth rate (RGR) of the plants are obtained in sequential order of treatment. Control, 0.5% and 2% samples form close linear fit to the model while 0.5% samples produce long tailed positive correlation fit whereas 3% samples are negatively fitted to the model. CDF model produce closely fitted relationship of 1% and control samples while 3% samples negatively corresponded to normal fit. Therefore, current study suggests promoting an efficient agriculture strategy that would be helpful in biomass gain of the crops to sequester carbon and effectively take part in climate mitigation.
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    Vegetation of highly disturbed conifer forests around Murree, Pakistan
    (Artvin Çoruh Üniversitesi, 2020) Khan, Afsheen; Ahmed, Moinuddin; Ahmed, Farid; Saeed, Rafat; Sıddıquı, Faheem
    This phytosociological investigation is conducted in various disturbed forests around Murree hills. The main purpose of study is to explore community types, associated ground flora and their relation to soil characteristics. Eight community types and two monospecific tree stands have been recognized as follows: Pinus wallichiana (pure), Pinus roxburghii (pure), Pinus wallichiana-Quercus baloot, Pinus wallichiana-Cedrus deodara, Pinus wallichiana-Abies pindrow, Pinus wallichiana-Quercus dilatata, Quercus dilatata-Cedrus deodara, Pinus roxburghii-Pinus wallichiana, Pinus roxburghii-Cedrus deodara, Pinus roxburghii-Quercus dilatata. Pinus wallichiana dominates monospecifically in 8 stands while Pinus roxburghii -Pinus wallichiana community types found at 5 locations. Pinus wallichiana formed community type with Cedrus deodara and Abies pindrow at 4 locations separately. Highest stand density achieved in Pinus wallichiana-Cedrus deodara and Pinus roxburghii-Quercus dilatata community i.e. 128 trees/h. Highest basal area (48.06 (m²/ha) recorded from Pinus wallichiana (pure) stands. Pinus wallichiana-Pinus roxburghii communities correlated significantly (p < 0.05) with tree density. Range of DO. pH, Temperature, Conductivity, Salinity, ORP and chemical parameters in each community type has also shown and discussed.