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Trattamenti con acido gibberellico e biostimolante per favorire lo sviluppo di talee radicate di camelia
No full textApplication of Actiwave® for Improving the Rooting of Camellia Cuttings
No full textBiostimulants are generally able to improve mineral use efficiency, enhance plant tolerance to biotic and abiotic stresses and stimulate some physiological processes related to development. In our studies, Actiwave® was tested in floricultural crops such as Camellia japonica L. to speed up growth reducing the nursery. The experiments were performed on flowering camellia, using non-rooted cuttings treated with Actiwave® (Valagro Spa) and gibberillic acid (GA3). The Actiwave was applied providing 0.015 or 0.03 ml per cutting, while the GA3 was applied 1.25 or 2.5 mg per cutting. Treatments were repeated each month with eight applications in total. The biostimulant was distributed on the substrate with a volume of 100 ml. The GA3 instead was nebulized on the leaves and on the substrate of each cutting. Rooting was monitored during the whole experimental period. The measurements of fresh and dry weight were taken after 127 days. Results showed that both Actiwave® and GA3 stimulated the rooting compared with control. The two concentrations of Actiwave® had the same effect, with an average fresh root mass of 0.5 g. The treatment with GA3 was observed for a dose-effect response. The differences in dry weight were observed only on roots, and values were significantly higher in the treatments compared to the control
Impiego di biostimolanti naturali su specie da bordura e riduzione dell’apporto di fertilizzanti in vivaio
No full textONE, concime completo per la lattuga coltivata in orti famigliari e urbani
No full textThe cultivation of vegetables in the garden or on the balcony for own production is often performed as hobby from persons without any agricultural knowledge. Therefore the good agricultural practies are not followed. The most part of the growing practices are approximate, in particular fertilization. In this work a complete fertilizer has been evaluated for providing the mineral nutrients required from vegetables and stimulate the nutrient use efficiency. The product tested is ONE® commercialized from Valagro S.p.A. compared with control fertilized with the minimum lettuce requirements and solutions having the same concentrations of macro-nutrients present in ONE®. In order to separate the nutritional effect from the biostimulant effects.
Results showed that ONE treatments were able to speed up the growing rate of plants and these reached the commercial maturity earlier than other treatments. The yield in ONE® treatments were higher reaching 320 g/plant or 3 kg/m2 compared to 141 g/plant or 1.3 kg/m2 of the control. The chlorophyll content was higher in ONE treatments having a positive effect on the visual appearance of the vegetables. The nitrate content was very low below 500 mg/kg FW, much lower than the commercialization law limits. The sucrose content was higher in outer leaves compared the inner leaves, while opposite results were found for total sugars. In conclusion considering the yield and quality parameters the ONE at the 50% of the dose suggested on the label gave the best results in Iceberg lettuce
Effect of biostimulants on quality of baby leaf lettuce grown under plastic tunnel
No full textApplications of biostimulants might be used for stimulating the nutrient use
efficiency and improving quality of baby leaf vegetables. The aim of this work was to
evaluate the use of biostimulant for reducing the nitrate content and improving the
commercial quality. The field trials were performed under plastic tunnel in the
North Italy vegetable production area (Bolgare, BG, Italy) during spring (April-
May) and summer (July). The application of biostimulant (Actiwave®, Valagro
S.p.a) was performed by spray using a modified fertigation machine. The
concentrations of Actiwave applied were 0, 3, 4.5 or 6 ml m-2. The effect of
treatments was evaluated by the following determinations: yield, leaf nitrate content,
total chlorophyll, total carotenoids, anthocyanins and total phenols content. In
additional the health status of leaves was determined by chlorophyll a fluorescence
measurements. Results obtained showed that the 4.5 and 6 ml m-2 Actiwave
significantly increased the yield. The leaf nitrate content ranged between 900 and
1100 mg kg-1 FW and was slightly lower in the 3 ml m-2 treatment. The highest
chlorophyll and carotenoids were found in lettuce treated with 6 ml m-2 Actiwave
concentration. The anthocyanins and total phenols were slightly higher at higher
concentration of bistimulant. Actiwave treatments did not affect the main
chlorophyll a fluorescence parameters. This result might be due to an increase of
light use efficiency in treated plants. In conclusion, the biostimulant was able to
increase the yield, but slightly effect on nitrate metabolism was observed. The low
leaf nitrate content in all treatments might be due to the optimal environment
conditions
Levels of abscisic acid in integuments, nucellus, endosperm, and embryo of peach seeds (Prunus persica L. cv. Springcrest) during development
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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