Timely planting of vegetable crops is the key to a good harvest. However, the landing time in the open field or in a greenhouse depend on a combination of factors that have a t. H. and regional in nature.
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In any agricultural plant has its own biological characteristics that can not be changed with the selection and genetics. Cucumbers come from tropical India. In addition, they have big leaves and the root system of surface. This means that the cucumbers need:
- in stably high temperature (+18... + 30 ° C);
- in a good and constant moisture;
- in the long and abundant light;
- in loose soil with a large amount of organic material (not oily).
The decisive factors in planting seedlings of cucumbers in the state are the average daily air temperature and soil. When planting in the ground seed requirement initially imposed on the parameters of the soil, and then to the air.
At low temperatures the water becomes cold. Once the liquid cools down to + 10 ° C and below, it loses the ability to participate in the biochemical processes of the plant. As a result of cucumber leaves begin to wilt from the fact that the runners are not able to use chilled water. With long-term cooling, cultures do not grow and may even die. Due to lack of water can occur and symptoms of deficiency of vital elements.
When to plant
In order to understand when to plant cucumbers in the open ground, you need to know the dynamics of above average temperatures in the region. It is necessary to take into account the differences between day and night temperatures.
Refuse transplanting necessary in the event that the air warms up to day + 20 ° C and night cooling down to + 10 ° C. In this mode, the water in the soil is not able to stay warm. By morning, it can cool down to a state that is unacceptable for the biochemical processes throughout the plant, especially in leaves.
For good health cucumber planted in the ground, it is necessary that the temperature difference between day and night did not exceed 5-7 ° C. A better option is considered to establish the range from + 18... + 20 ° C until day +12... + 15 ° C at night. Cucumber young seedlings can withstand extreme conditions, when the air warms up to day +15... + 17 ° C, and is cooled at night to 7 and even + 5 ° C. However, such differences do not result in death of the plant is only on the condition that they do not last more than 1-3 days. If they persist for example, weeks, cucumbers may be killed or severely stunted.
Cucumber seeds sown in the open ground is necessary after the soil warms to a temperature above + 10 ° C. However, the time of seed germination stable temperature above 15 ° C should be established in the surface and the air layer.
Terms of sowing and planting cucumbers in greenhouses depend not so much on natural conditions, as the device itself greenhouses. If it is possible to carry out air heating and watering with warm water, then set down the seedlings in the greenhouse is allowed at least one month earlier than in open ground.
All of these conditions determining the timing of cucumber landings are of great importance. However, the decisive factor is the likelihood of late frosts. In various regions of Russia, these terms may be defined differently. For example, in Siberia and the Far East, the probability of late frost is reduced to zero only at the beginning of June. In Chernozemya zone m. E. in the south of the European part of Russia, the risk disappears a month earlier.
The above-described temperature conditions for cucumber growth in the early stages of development of lashes is an important factor that contributes to a good harvest. Thermophilic vines with large leaves can not withstand even momentary reduction temperature below 0. So that in determining the timing of cucumber landings need to focus on during the onset of favorable temperature conditions. However, we must first put the vegetables in the period when the frosts already unlikely.
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