جستجوی مقالات مرتبط با کلیدواژه "جذب مواد معدنی" در نشریات گروه "زیست شناسی"

Among the factors that reduce the production of agricultural products, weeds are of particular importance, which lead to huge losses in agriculture. In order to investigate the competition of lambsquarters weed with parsley medicinal plant, a factorial experiment was conducted in the form of a completely random basic design with three repetitions in the greenhouse of Damavand Technical and Vocational School in 1402. Experimental treatments include different levels of weed germination time (7 days before parsley sprouting, simultaneously, 7, 14 and 21 days after parsley sprouting) and plant density (zero, 1 and 2 parsley plants in the pot). The results of the experiment showed that plant height, fresh and dry weight of shoot, yield per unit area (pot), petiole diameter, absorption of nutrients and vitamin C were affected by the time of germination and weed density. The lowest amount of studied traits was observed in the treatment of 7 days, early greening of lambsquarters. The highest percentage of essential oil (0.94%) in the 21-day greening treatment of lambsquarters and the lowest percentage of essential oil were related to the greening time of -7 and 0 days, which were statistically classified in the same category. Also, the highest percentage of essential oil (0.98%) was related to the treatment of zero density of lambsquarters (control), and the lowest (0.64%) was related to the density of lambsquarters 2 plants in a pot. Therefore, it is recommended to plant parsley early so as not to reduce its quantitative and qualitative yield, although weed density should not be neglected.