Assay on the effect of Dispersal for saline soil improvement in roses.

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DISPERSAL is a calcium deficiency corrector formula which, in turn, acts by modifying the structure of saline-sodic, compacted, unstructured or blocked soils. Its application causes an unblocking in the soil, improving the assimilation of nutrients. The complexing organic acids transport the calcium to the exchange sites, dragging the sodium to lower areas of the soil, out of the reach of the root system.

DISPERSAL is able to make sodium-saline soils no longer saline or, at least, to reduce salinisation as much as possible.

Once the characteristics of the product had been analysed, the farm technician designated the Cream variety of Cream in Block 4 for this trial, as the beds of this variety show typical chlorosis due to excess salts, defoliation, short and thin stems, which is assumed to be due to a problem of salts in the soil. For this reason, it was decided to apply the product DISPERSAL by trial to reduce this problem.

Objetive

Improve the quality of the variety’s stems to increase the productivity of the variety.

General assay data

Crop: Rose

Variety: Cream de la Cream

Block: 4

Number of beds: 10 beds

Mode of application: Drench with Venturi

General dose: 3 lt/Ha

Dose for 10 beds: 137 cc

Volume of stock solution: 40 litres

Time of application: 7:30h

Methodology

DATE

DOSE

COMMENTS

17-march-2016

3 lt/Ha

1st. Application

24-march-2016

3 lt/Ha

2nd. Application

31-march-2016

3 lt/Ha

3rd. Application

7-april-2016

3 lt/Ha

4th. Application and evaluation

21-april-2016

–

Evaluation

Results

After the 4 applications of DISPERSAL, together with the farm technician, the following was observed:

In the soil of the beds tested, it could be observed that there were no longer many fallen leaves, even when moving and shaking the stems of the variety it could be corroborated that the leaves no longer fall as could be noticed before starting the trial.
Improved foliage colouring
Improved quality and length of stems

Before applying Dispersal
After 4th application of Dispersal
Before applying Dispersal
After 4th application of Dispersal

Conclusions

After the joint evaluation with the technician of the farm, it can be concluded that the product DISPERSAL, fulfilled its objective, that is to correct the problem of salts, therefore the plant improves the assimilation of the nutrients in the soil and the Calcium becomes more available, a better colouring of the whole crop is observed, an important reduction of the defoliation, improvement in the length of the stems.

The Calcium contained in DISPERSAL is highly soluble and mobile due to the carboxylic acids it contains.

Therefore, we recommend the use of DISPERSAL to correct excess salts and therefore improve the quality of export stems.

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