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Tips m.b.t. spoorelementen

Geplaatst door Manon Vogel (manon) op Jan 08 2014
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Trace element tips:

A trace mineral deficiency can affect yield, disease protection, weed pressure, nodulation, reproduction or chlorophyll density and any of these will impact upon your profitability. Here are some guidelines that may help you in the management of trace mineral nutrition.

1) Foliar fertilising is the most effective delivery mechanism for trace minerals. It is up to 15 times more efficient and it bypasses problems associated with mineral lockups and antagonisms in the soil. Fulvic acid is an invaluable additive with all foliars as it has been shown to increase the permeability of cell walls allowing 30% better uptake of nutrients. The unique Shuttle® delivery system pioneered by NTS offers delivery of minerals through the stem or either side of the leaf.

2) Zinc can have more impact on yield than any other trace mineral because it is the building block for hormones called auxins in the plant. Auxins govern leaf size, so a zinc deficiency almost always means less yield due to a smaller solar panel (leaf). Zinc also impacts phosphate uptake so it is important to address a deficiency. Zinc Shuttle can be foliar applied at 3 litres per hectare or you can make a D.I.Y. chelate using zinc sulfate and NTS Soluble Fulvic Acid Powder. In broadacre crops you can foliar spray as little as one kilo of zinc sulfate per hectare combined with 100 grams of NTS Soluble Fulvic Acid Powder in 100 litres of water per hectare. In vegetable crops you might lift that rate to 3 kg of zinc sulfate with 300 grams of fulvic acid powder per hectare and in established fruit crops the rate lifts to 5 kg of zinc sulfate with 500 grams of fulvic.

3) Selenium is the new kid on the block when it comes to trace mineral nutrition. It has long been understood that this is an important mineral for livestock and human nutrition but it was only recently that it has been found to impact plant health. Finnish researchers reported a 30% yield increase in potatoes following selenium application. This was attributed to a reduction in photo-oxidative stress where the crop was better able to handle UV radiation and that reduced stress translated into larger tubers. The top selling NTS foliar, Triple Ten, features a healthy 250 ppm of selenium in the formulation and represents one of the first products to address widespread selenium deficiencies in the soil and plant.

4) Copper is a big player in stem strength and ammonium uptake but, most importantly, it is this mineral that delivers fungal protection to the plant. I am not talking about copper fungicides applied onto the leaf but rather mineral copper delivered into the leaf. Copper should be maintained at a minimum of 2 ppm in the soil and anything less than this heralds less than desirable levels in the leaf and an associated susceptibility to disease. The best tool to deliver copper into the leaf is the NTS product Copper Shuttle. I am obviously biased, but I have yet to see anything that delivers copper more effectively than the unique Shuttle® delivery system.

Written by Graeme Sait

 

Laatst vernieuwd: Jan 08 2014 om 6:52 PM

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