THE PROGRAMMING OF THE SUPPLY OF NUTRIENTS IN RELATION TO THE GROWN VEGETABLE AND GROWING TECHNIQUE

A good programming of the nutritional supply of a vegetable crop in a greenhouse during the whole growing period is very important for a good cultivation result.
In Sweden our experiences and research work are mostly concentrated on tomatoes and cucumbers.
The growing technique is cultivation on a substrate, mostly mineral wool but also peat, peat mats, plastic material /oasis/ etc.
A circulating system is sometimes used and drip irrigation is common for watering and nutrient supply.
CO₂ is normally given.

The programming is dependent on many factors of which the following are important:

1. Type and variety of crop

2. Stage of development of the crop

3. Season of the year

4. Greenhouse type

5. Greenhouse climate Radiation, temperature, humidity

6. Cultivation methods Substrate, watering system Type of and degree of automatization Cultivation care

It is in this lecture assumed that a standard nutrient solution is established, and that eventually changes in concentration and composition is undertaken around this standard.

The programming is based on a "blue print" cultivation scheme that summarizes earlier experiences for many years and new research and experimental results from Sweden

Symposium on the Use of Fertilizers in Protected Vegetable Production

L. Ottosson, I. Christensen

https://doi.org/10.17660/ActaHortic.1984.145.2