The onset of the conditions necessary for the process of seed
germination carried out in a greenhouse vegetable crops, are of
particular importance to the following factors: substrate temperature,
humidity and light.
Temperature
To arise uniformly and in a specified time, the plants need specific optimal temperature.
During seed germination and emergence to the plants, it is required a constant temperature of the substrate close to the upper limit of the optimum temperature for each vegetable species.
If the substrate temperature is kept low for a long time after the onset of the germination process or temperature variations in the values of the seeds lose large amounts of nutrients up and during the germination is extended, delaying the emergence of up to 10-14 days.
Providing a substrate in the constant temperature (22-26 ° C), it is suffice for most vegetable crops, these ends 3-6 days emergence conditions, except for the culture of lettuce in which the optimum temperature for germination of 18 degrees Celsius.
Each species vegetable has certain demanding of temperature and directing it must be made differently, for which reason it is recommended that in the same space to simultaneously produce only seedlings of the species with similar requirements (for example, green eggplant or cabbage lettuce).
Light - During the production of seedlings, directs light differently. Thus, the vegetable seed germination must take place in the dark, the light is not necessary, and this is achieved by covering with papers or cardboard or paper seedbed alveolar trays.
Moisture is necessary for germination of 100%. Moisture is safe complete wetting of the substrate by seeding (before sowing peat-based substrate is placed in a container and very good wet when clasp few drops of water flow).
At the same time, over the seed bed trays cellular or non-coated paper or paperboard, is placed a polyethylene film (may be white or black), having the function of retaining the optimal humidity germination. Attention, however, this method of floor coverings seedbed applies only to sowing crops during the winter when sunlight intensity is low and does not create problems; during the spring and summer in particular, do not use any form coating film because it results in suffocation and death of seedlings.
Temperature
To arise uniformly and in a specified time, the plants need specific optimal temperature.
During seed germination and emergence to the plants, it is required a constant temperature of the substrate close to the upper limit of the optimum temperature for each vegetable species.
If the substrate temperature is kept low for a long time after the onset of the germination process or temperature variations in the values of the seeds lose large amounts of nutrients up and during the germination is extended, delaying the emergence of up to 10-14 days.
Providing a substrate in the constant temperature (22-26 ° C), it is suffice for most vegetable crops, these ends 3-6 days emergence conditions, except for the culture of lettuce in which the optimum temperature for germination of 18 degrees Celsius.
Each species vegetable has certain demanding of temperature and directing it must be made differently, for which reason it is recommended that in the same space to simultaneously produce only seedlings of the species with similar requirements (for example, green eggplant or cabbage lettuce).
Light - During the production of seedlings, directs light differently. Thus, the vegetable seed germination must take place in the dark, the light is not necessary, and this is achieved by covering with papers or cardboard or paper seedbed alveolar trays.
Moisture is necessary for germination of 100%. Moisture is safe complete wetting of the substrate by seeding (before sowing peat-based substrate is placed in a container and very good wet when clasp few drops of water flow).
At the same time, over the seed bed trays cellular or non-coated paper or paperboard, is placed a polyethylene film (may be white or black), having the function of retaining the optimal humidity germination. Attention, however, this method of floor coverings seedbed applies only to sowing crops during the winter when sunlight intensity is low and does not create problems; during the spring and summer in particular, do not use any form coating film because it results in suffocation and death of seedlings.
| CULTURE | PERIOD | substrate temperature Celsius degrees | LIGHT | HUMIDITY |
| tomatoes | Until the emergence | 22-24 | Complete absence of light | 100% |
| Pepper Eggplants | 24-26 | |||
| Cabbage Cauliflower | 20-22 | |||
| Cucumbers Pumpkins | 25-30 |
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