جستجوی مقالات مرتبط با کلیدواژه "petunia" در نشریات گروه "باغبانی"

Organic fertilizers preserve food cycle, reduce pollution and remediation of soil physicochemical properties and stabilization of plants in soil. To investigate the effect of organic fertilizer (vermicompost, compost and manure) on physiological characteristics of Petunia hybrida, a factorial greenhouse experiment was conducted based on completely randomized design with three replications at Ferdowsi University of Mashhad. Treatments consisted of three irrigation levels (irrigation based on 100% of field capacity (FC), equivalent to 360 ml of water (D1), 50% of field capacity, equivalent to 180 ml water (D2), and 25% of field capacity, equivalent to 90 ml water (D3), in each 2-kg pot) and four fertilizer treatments (control, compost, vermicompost and manure). The measured morphophysiologic traits were plant height, number of lateral branches, number of leaves, number of flowers, volume of roots, dry weight of leaf, root, stem and flower, electrolyte leakage, stomatal conductance and photosynthetic pigments. Results showed that irrigation levels and fertilizer types were significant for all measured traits. The interaction of irrigation and fertilizer treatments showed that the highest amount of leaf dry weight, stem dry weight, plant height, number of flowers and stomatal conductance was obtained in the 100% FC and manure fertilizer. In 25% FC treatment, 10-flower weight was increased by 38, 29 and 61% in compost, manure and vermicompost, respectively, compared to control. Among the fertilizer treatments, the highest level of chlorophyll a was measured in control. However, the highest chlorophyll b, total chlorophyll and carotenoid content was observed in vermicompost treatment. Generally, manure and vermicompost had better effects in improving the performance and number of flowers of petunia under deficit irrigation.

In this complete random block study we aimed to assess the morphologic reactions of Petunia under water deficiency. We used four irrigation treatments (irrigation amount of 25%، 50%، 75%، and 100% of the field''s irrigation capacity. The study consisted of 8 repetitions during 6 months in the greenhouse. Data were analyzed using SPSS software، version 12. 0 and the mean data were compared with each other using the least standard deviation (LSD) at a 5% level. The results showed that the root''s length، weight، and dry weight، the wet to dry weight ration of the branch، number of branches، number of flowers، relative water content of the leaf، and chlorophyll content reduced. However، the flower period، profil content، and the potassium and sodium percentage increased. The Petunia can sustain low irrigation and can be used as a resistant plant to poor water conditions in green spaces.

Silicon is a non-essential element with benecial effects reported for several crops. The main goal of this experiment was to investigate the effects of silicon (Si), on growth and physiological characteristics of Persian Petunia. For this, a factorial trial based on completely randomized design was conducted with 4 levels of Si (0, 50, 100 and 150 mg L-1), in two growth stages (4-6 and 8-10 leave) with 4 replications. The experiment was done in a greenhouse. Si was applied via foliar spray once a two week before the flowering stage. Si increased flower diameter, flower tube length and leaf area by 35, 24 and 52 percent compare to control, respectively. Si at 50 and 100 mg L-1 concentrations also increased Flowering rate by 14 and 9 percent in comparison to control. Photosynthesis and maximum quantum efficiency of PSII (Fv/Fm) ratio were also increased with Si. Flowering rate and leaf area of 8-10 leaf plants were higher than 4-6 leaf plants. Interactions between Si concentrations and growth stages for the measured traits like flower diameter, flowering rate, flower tube length, leaf area, photosynthesis, Fv/Fm ratio, stomatal conductance and chlorophyll index, were not statistically significant. Generally Si improved growth and physiological characteristics of petunia.