DEMETRA NEWSLETTER #70 - DEMETRA ITALIA srl - an agro resource

Headquarter: 5, Via San Vitale
40026 - Imola (BOLOGNA) Italy
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Weekly column: how important are TRACE ELEMENTS DEMETRA's main products

Our weekly column on plant nutrition comes to an end with this article on trace elements, catalytic elements essential for the production of enzymes and that accelerate chemical reactions.

Iron, for the most contained in leaves and chloroplasts (growing parts of the plant) is an essential element, especially for the aerial apparatus of plants, which ensures optimal synthesis of chlorophyll, photosynthesis and cellular respiration.
In nature, it is present in the soil in an insoluble form and it is not easily assimilated by the roots therefore, it should be transformed into a simple bivalent or complex trivalent ferrous ion. This reduction in ferrous ion does not occur in soils at high pH level and/or with a high content in active limestone, the resulting iron deficiency is due to its antagonism with calcium, magnesium, zinc and copper which creates non-absorbable complexes.
It is important to ensure a proper intake of iron to avoid deficiencies that reduce vegetation and production and manifest themselves with a characteristic yellow interveinal color on leaves.
Our line of iron chelates includes DTPA and EDTA (leaf) and EDDHA (root) chelated products.
The products for radical applications, to be uses with hose or even with the shower both for vegetable and fruit crops, are: REFER, the top of the range, MACHFER and FE 650.
Products specific for foliar application are: Ferrochelato Ellesei (DTPA, more selective) in liquid formula, Machstar Fe DP (DTPA) in micro-granules, Machstar Fe LO (EDTA more aggressive) in micro-granules. In other products iron are combined with manganese (Chelato Fe-Mn) or other trace elements (Microtech Ps).
It is important to choose the right product, number of application and dose taking into account both the crops and soil composition; the choice of the most appropriate formula will be done by the specialized technician, able to suggest the best product.

This element is very important, despite being absorbed by plants in very small quantities.
Essential for metabolism and transport of sugars to improve organoleptic qualities, it affects growth of the roots and the division of meristematic tissues, improving fruit size, it also affects the reproductive process, controlling the formation and viability of pollen.
Boron promotes the uptake of cations, especially calcium, and it is stored mainly in the leaves. Its deficiency involves a stop in buds’ development and the necrosis of the vegetative apices.
Boron gets lost in sandy soils while it is little movable in the clayey ones, where its decomposition is slow.
It is easier to have a deficiency of this element in periods of drought while its availability decreases with increasing of soil pH (alkalinity). Moreover, an excessive presence of nitrogen and calcium leads to a reduction in the absorption of this element.
Our main products are: Boron 17 PS (boric acid) in soluble powder and Boron Elleundici (boron ethanolamine) in liquid formulation. Boron is also contained in small quantities in other formulations such as Microtech PS, Magnesium 15 PS + micro, Micromix L, Briocall Forte PS and in the products composing our water-soluble gamma, Magnus Plant and Mirafoil (from our NECTARYA GOLD line). The high quantity of products containing this element in are catalogue remarks its importance for the crops.

Manganese is the component of chlorophyll granule structure, it promotes its photosynthesis acting activating ion and it help the cellular respiration overall. It also activates the enzyme responsible for the oxidation of indoleacetic acid, resulting in the formation of auxins.
It is stored in the leaves and its ratio with iron must always remain 2 to 1. An excess of this element involves ferric chlorosis.
In the soil it is absorbed as a bivalent cation Mn2+, its availability is limited in alkaline soils. This element is poorly movable towards the roots and the periods of drought compromise its uptake, causing chlorosis first in the youngest and then in the older leaves while, under normal conditions, crops have the tendency to absorb too much manganese.
DEMETRA products based on this element are: Manganese chelate L (EDTA), Manganese L (from sulfate), Manganese NT L (from manganese nitrate) all in liquid form. As for iron and boron, this important element is also contained in other formulations already mentioned above, combined with other trace elements.

Copper composes some metal-proteins and in particular cytochromes. As a catalyst element, it is active in the phenomena of oxide-reduction, in protein and chlorophyll synthesis and it is essential for the production of important enzymes.
It is absorbed by the soil as a simple or complex ion, antagonist of iron (excesses of copper can lead to a decrease in the availability of this elements), molybdenum, manganese, phosphorus and nitrogen, it is not easy to have deficiencies of this element in plants.
Our copper based solutions: Ramechelate Ellenove (EDTA), in liquid form.

Zinc participates in synthesis of tryptophan, a precursor of auxins (growth hormones) and it is present in several enzyme systems that are involved in proteins’ metabolism, it is mainly stored in seeds and it is more available in an acidic environment.
It is easily absorbed as a bivalent ion (Zn--) both by roots, leaf epidermis and branches.
An excess of zinc causes deficiencies of iron, of which it is strongly antagonistic, and phosphorus too.
Our main products are: Zincochelato Ellesette (EDTA) and Zinc L. This element is also present in different formulations, in a mixture with other trace elements such as: Magnesium Zinc L, Magnesium 15 PS + micro, Micromix L, Microtech PS and in the products composing our water-soluble gamma, Magnus Plant and Mirafoil (from our NECTARYA GOLD line).

This element is essential in protein synthesis and nitrogen metabolism (assimilation and use, important especially for alfalfa and soy) and it limits the accumulation of nitrates in vegetables.
Available in soil with neutral pH, it is vital for legumes and cauliflower, cultures where deficiency is manifested by a deformation of young leaves.
Our main solution containing molybdenum is Molibor (in mixture with boron ) in liquid formulation.

As always, a proper nutrition comes from an appropriate choice of products and a program of targeted interventions according on the crop and the soil conditions (carrying out analysis is very important). This will avoid deficiencies, which will inevitably lead to poor quality and quantitative results.

DEMETRA’s range is complete for all crops and all phenological stage with products that can be used both in fertigation, in soil or for foliar treatments. To have further and detailed information about our products you can require our catalogue at the following address:

Demetra Italia s.r.l. | | tel. +39 0542 670170  | Via San Vitale, 5 - Imola  (BO) Italia | Stabilimento: Via delle Arti, 6 - Castel Guelfo (BO) Italia | P.IVA: IT00596661207
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