DRIP IRRIGATION FOR GREEN BEANS

Origin and diffusion of green beans 

The green bean (Phaseolus vulgaris L.) is an annual plant which originated in Central America and belongs to the legume family; the edible part is the whole pod, which is tender and fleshy because it is harvested at a stage when the seeds are not yet fully ripe and enlarged. Green bean cultivation is now widespread in different areas of the world; in Italy, the main regions specializing in cultivation are Campania, Veneto, Sicily, Lazio and Puglia.

Pedoclimatic requirements

The green bean is suitable for almost all types of soil, preferring deep, fresh and well-drained soils with a low organic matter content and a pH between 5.5 and 7.5; it does not tolerate very chalky, saline or boron-rich soils.

From a climatic point of view, being a macrotherm species, it adapts to warm temperate climates; however, during growth, it exhibits some difficulties above 35°C, with the risk of early fruit dropping.

Irrigation System for green beans 

The water requirements of green beans are variably high depending on the cultivation order (field cultivation in the spring-summer cycle or forced cultivation in greenhouses or tunnels), and the characteristics of the cultivars (dwarf/climbing, early/late).

Annual volumes vary, therefore, from 1,500 to 3,000 m3/ha: for example, varying the planting layout and the different vegetative habitus of the plants (more or less branched) can result in a different degree of biomass produced, which translates into different evapotranspiration requirements and therefore different water needs.

Irrigation plays a key role in the cultivation of the green beans by allowing them to enter production more quickly and, above all, by improving their production yields.

Even though the plant is genetically predisposed for rapid vegetative growth, irrigation accelerates the process by causing the plant to flower faster and then to produce fruit.

The recommended irrigation methods for growing green beans are micro irrigation methods, which allow water to be localised plant by plant, maximising the use of water resources.

Due to the small distance between plants in the row, Irritec offers lightweight ribbon drip lines (Tape or eXXtreme Tape) or flat drip lines (P1 or P5) for seasonal or multi-seasonal use.

A close distance between the drop points (10-30 cm) is recommended to create a wet strip along the row.

In the most common applications, single or double hoses per row are used under a mulch sheet, a solution which when used in combination with short and frequent irrigation shifts keeps the soil profile along the row constantly moist, and contains weed growth.

Filtration 

It is also essential to provide an accurate filtration system in order to safeguard the driplines from possible blockages and maintain the high performance of the irrigation system over time.

The choice of the best filter for the irrigation installation depends on the nature of the water supply source and therefore on the extent of debris in the water.

Each drip line model also requires a specific level of filtration in order to function properly. Irritec offers a wide range of filters, able to cover the most varied business needs.

Fertigation and automation

Green beans are a crop that adapts well even to less fertile soils, but the short cycle and therefore the speed of absorption make it necessary to have adequate nutrients in the soil.

Despite the action of nitrogen-fixing microorganisms, beans benefit from nitrogenous fertilisation, as long as it is split up and is not overused enough to cause excess plant vigour as well as flower droppings, a higher incidence of botrytis attacks and, if the ratio is strongly unbalanced with respect to potassium, also a higher incidence of rust.

In addition to nitrogen, it is important to provide the soil with the right proportions of the other two macroelements, phosphorus and potassium, and if necessary, also with micro-elements such as iron, calcium, magnesium, copper, molybdenum, Zinc and manganese.

Excess boron and chlorine should be avoided. To that end, Irritec offers innovative and flexible solutions for any type of business, from the smallest to the most advanced in terms of scale and technology.

Amongst the wide range of fertigators offered by the company, those most suitable for growing green beans are the Ferticlick ByPass, which allows the dosing of a single nutrient solution in a proportional or volumetric manner with Venturi, or the DosaBox Junior Automatic, which is perfectly suited to extensive field crops, allowing the proportional dosing of up to 3 different fertilisers and simultaneously monitoring the pH and EC of the irrigation water.

If the acid channel is to be managed separately, the Irritec solution is the Dosabox Junior Advanced equipped with a Commander NPK programmer, which can manage the 3 fertilisers either volumetrically or at EC target + the corrected acid via settable values.

GREEN BEANS GROWING IRRIGATION SYSTEM

A practical example of how to drip irrigate green beans:

Irrigation System design Irritec

Here are the Irritec products you need to drip irrigate green beans

1

P1® – Irritec Tape®

High-quality hoses with turbulent flow drip head designed for open-field irrigation Easy to lay and install, they have excellent occlusion resistance. Available in various models that can cover long lengths with maximum uniformity of delivery.

dripline for green beans irritec

2

TUBING IN PE AND CONNECTO™

The Connecto™ line of compression fittings for the conveying pressurised fluids, particularly suitable for irrigation and gardening systems, is characterised by its great speed and ease of assembly.

tubing in pe irrigation green beans - Irritec

3

FILTERS

Irritec® filters provide the best filter protection for every irrigation system. The simple and safe structure, the result of precise construction technology, reduces maintenance to a minimum. Resistant to pressure fluctuations and external stress, the filters feature robust and flexible filter elements. Hydraulic tightness is ensured even at high pressures and the filter elements guarantee maximum filtration efficiency. The variety of filtration degrees available (from 20 to 450 mesh) can meet all filtering needs.

FILTERS- irrigation green beans - Irritec

4

FERTIGATION

Irritec® injection systems are reliable and easy to use. They allow the injection of fertilisers (liquid or diluted in water) at rates of between 150 l/h and 1700 l/h (depending on the model).

Fertigation System for green beans Irritec

5

DRIPLINE FITTINGS AND BRANCHES

Complete range for connecting tape, light and classic dripline, available in sizes 16, 20, 22, 23, 25 and 29 mm.

GREEN BEANS DRIPLINE FITTINGS AND BRANCHES

Discover how to irrigate others crops

Irritec wants to make life easier for those who take care of the plants, for work and for passion. We aim to ensure that every drop is spent as well as possible, minimizing the ecological footprint.

Agronomic Irritec Team support the farmer also on after-sale and installation, with continuous assistance and efficiency control. Continuous attention to the customer needs to provide succesful and sustainable solution with an efficience service.