Search results for "Fertilizer"

Comparative efficiency of different biofertilizers applied to the same field

2016

Effetti delle epoche e modalità di concimazione su produzione e qualità del finocchio. Effects of time and method of fertilizer application on yield …

2010

Two field trials were carried out in Sicily during fall-winter and spring season to determine the influence of 9 fertilization treatments, obtained by changing the time (pre-plant and/or post-plant fertilization), and method (broadcast fertilization and/or fertigation) of fertilizer application and the type of fertilizer (mineral, organic, slow release fertilizers) on yield and quality of fennel. An unfertilized treatment (control) was also included. In all fertilized treatments, macronutrients were applied at the following total rates (kg ha-1): N (350), P2O5 (100), K2O (208). In both trials the highest yield and mean bulb weight was obtained by pre-planting application of all mineral fert…

Advances in Design, Simulation and Manufacturing IV

2021

This book reports on topics at the interface between mechanical and chemical engineering, emphasizing design, simulation, and manufacturing. Specifically, it covers recent developments in the mechanics of solids and structures, numerical simulation of coupled problems, including fatigue, fluid behavior, particle movement, pressure distribution. Further, it reports on developments in chemical process technology, heat and mass transfer, energy-efficient technologies, and industrial ecology. Based on the 4th International Conference on Design, Simulation, Manufacturing: The Innovation Exchange (DSMIE-2021), held on June 8-11, 2021, in Lviv, Ukraine, this second volume of a 2-volume set provide…

Quantifying the contribution of nitrification and denitrification to the nitrous oxide flux using 15N tracers.

2006

8 pages; International audience; Microbial transformations of nitrification and denitrification are the main sources of nitrous oxide (N2O) from soils. Relative contributions of both processes to N2O emissions were estimated on an agricultural soil using 15N isotope tracers (15NH4+ or 15NO3-), for a 10-day batch experiment. Under unsaturated and saturated conditions, both processes were significantly involved in N2O production. Under unsaturated conditions, 60% of N-N2O came from nitrification, while denitrification contributed around 85-90% under saturated conditions. Estimated nitrification rates were not significantly different whatever the soil moisture content, whereas the proportion o…

Improvement of the nitrogen uptake induced by Ti(IV) supply in nitrogen stressed pepper crops

1996

The beneficial effect of titanium on plant metabolism can result in a more profitable use of fertilizers on many crops. An experiment was performed in a greenhouse with Capsicum annuum L. cv. Bunejo plants cultivated under different levels of nitrogen fertilization: 100% N — 250 N fertilizer units/ha (NFU); 75% N - 187.5 NFU; 50% N - 125 NFU; 25% N - 62.5 NFU. A third of the plants in each N support remained Ti-untreated and were used as a reference. Each of the other thirds received one and two 2 mg Ti/l, pH 6, leaf spray treatments respectively (35 ml/plant). Biomass production of the Ti-untreated references was only affected by N-supplies of 25%. Ti leaf spray treatments induced a biomas…

PENGARUH PEMBERIAN PUPUK OSMOCOTE TERHADAP PERKECAMBAHAN 3 GENOTIPE ADENIUM

2018

<em>This study aims to find out the effect of osmocote fertilizer to the germination of three genotypes of Adenium and also to compare the germination among three Adenium varieties. Factorial experimental method was being used in this pot experiment which designed by using Factorial Randomized Group Design. First factor is the 3 types of Adenium, while the second factor is 6 dosage levels of Osmocote. The results of this research showed that the addition of various dosage of the osmocote significantly affected the germination of 3 types of adenium. The effective dosage of Osmocote for adenium germination is one gram while the white flower adenium has the best germinability.</em>

Wastewater management using a pilot-scale horizontal subsurface flow system in Western Sicily (Italy) for irrigation of Paspalum vaginatum Sw. turf

2017

The reuse of treated wastewater represents an attractive prospect for sustainable water management in urban areas. The aim of this study was to evaluate the reuse of treated wastewater from constructed wetland systems for the irrigation of Seashore paspalum turf (Paspalum vaginatum Sw.) and assess the effects of treated wastewater on the soil and turfgrass. The research was carried out in Sicily (Italy) in a pilot-scale horizontal subsurface flow system (HSSF). Seashore paspalum plots were irrigated with freshwater and treated wastewater. In treated wastewater-irrigated plots, we estimated the amounts of nitrogen and potassium, supplied by irrigating with treated wastewater. The productive …

Does short-term potassium fertilization improve recovery from drought stress in laurel?

2014

Xylem hydraulic conductance varies in response to changes in sap solute content, and in particular of potassium (K(+)) ion concentration. This phenomenon, known as the 'ionic effect', is enhanced in embolized stems, where it can compensate for cavitation-induced loss of hydraulic conductance. Previous studies have shown that in well-watered laurel plants (Laurus nobilis L.), potassium concentration of the xylem sap and plant hydraulic conductance increased 24 h after fertilization with KCl. The aim of this work was to test whether water-stressed laurel plants, grown under low potassium availability, could recover earlier from stress when irrigated with a KCl solution instead of potassium-fr…

Quantitative determination of octylphenol, nonylphenol, alkylphenol ethoxylates and alcohol ethoxylates by pressurized liquid extraction and liquid c…

2007

6 páginas, 1 figura, 2 tablas.

Effect of nitrogen fertilizer level on quality and shelf-life of fresh cut Swiss chard

2018

Swiss chard (Beta vulgaris L. var. cicla L.) is a leafy vegetable highly appreciated in some areas for its nutritional properties and year round supply. Its production area is not commercially important, but this minor vegetable offers an interesting enlargement of the current vegetable assortment by using its stalks and leaves. Swiss chard is a very nutritive demanding species. The content of mineral elements, total quality and yield are influenced by the amount, frequency and method of fertilization. The aim of this study was to evaluate the effect of high or low levels of nitrogen fertilization on the quality and shelf-life of minimally processed Swiss chard. Plants grown with a high (18…