**2. Cultivation systems for cucumber growing in greenhouses**

In the last 45 years different hydroponic systems are developed in the world, the different systems can be subdivide in four groups [3]. Whereas, cucumbers are cultivated mostly in the first and second system.

Therefore, substances have been used as fertilizers and as bioregulators. Lactates are available under the brand name LACTOFOL® [5, 6]. That suspension fertilizer was designed mainly for foliar application and patented as a plant growth and develop-

*Growth Promoting and Stabilizing of Cucumber Plants Cultivated in Soilless Cultivation…*

Humates are the salts of Humic acids which are complex polymers including amino acids, amino sugars, peptides, aliphatic compounds involved in linkages between the aromatic groups [7]. There are different types of humates related to the organic material used and the method of extraction of the Humic Acid; in the

**Components Unit LACTOFOL O® Components Unit LACTOFOL O®** Lactic acid % 10 Magnesium % 0.1 Riboflavin mg/l 0.5 Iron % 0.4 Ascorbic acid mg/l 3 Boron mg/l 300 Thiamine mg/l 0.1 Copper mg/l 200 Nitrogen % 30 Manganese mg/l 250 Phosphorus % 7.5 Zinc mg/l 125 Potassium % 15 Molybdenum mg/l 18 Calcium % 0.5 Cobalt mg/l 6

ment regulator. The composition of LACTOFOL O® is shown in **Table 2**.

**3.2 Humates**

experiments were used different types:

*DOI: http://dx.doi.org/10.5772/intechopen.96536*

• Peat used by Merck

◦ Na Humate

• Brown coal

◦ K Humate

◦ NH4 Humate

◦ Fulvic Acid

◦ K Humate

◦ K Humate

◦ K Humate

**Table 2.**

**69**

*Composition of LACTOFOL O®.*

• Leonardite R (Russia)

• Coconut fiber (Mexico)

• Leonardite G (Germany)
