When will the latest cucumbers be planted?

Cucumbers like warmth and are not resistant to cold, so cucumbers are widely distributed in southern China and are one of the main greenhouse products. Because of the different planting time, they are divided into spring cucumbers and autumn cucumbers. The following editor will introduce the planting time of spring cucumbers and autumn cucumbers.

Planting time of Spring Cucumber

Spring cucumber refers to the cucumber that is raised in winter and harvested in spring. Let's take a look at the sowing time and planting time of spring cucumber:

1. The sowing time of spring cucumber: the sowing time of spring cucumber is determined according to the planting date, the suitable calendar seedling age is 40-50 days, and the physiological seedling age is four leaves. If the seedling age is calculated according to the calendar, the seeds will be sown 40-50 days before planting. The age of physiological seedlings is related to the method of raising seedlings. It takes 50-55 days to raise seedlings in sunny beds or solar greenhouse, 45-50 days in heating greenhouse and 45 days in electric hotline greenhouse. Therefore, the sowing time is also different with different seedling raising methods. Practice has proved that rapid seedling raising not only saves time, but also emerges quickly and thrives, and the early yield is high. Where there are conditions, try to use rapid seedling breeding.

2. The planting time of spring cucumber: the planting time of spring yellow claw is after the local late frost, and the ten-day average temperature is more than 18t. Beijing, Tianjin and Shijiazhuang are generally planted after late April. In order to slow down the seedlings quickly, choose sunny days to plant seedlings, do not plant in cloudy or windy days. The planting density is mainly determined by the characteristics of the variety.

Planting time of autumn cucumber

The cultivation of autumn cucumber is only in the frost area, which refers to the end of harvest before the first frost, while in the frost-free area all the year round, the cucumber is listed in summer cucumber seedling pulling and autumn. The growth period of autumn cucumber is only 80-90 days, and it can be directly cultivated or transplanted. production in open field or greenhouse.

Autumn cucumber is generally sown about 70 days before Frosts Descent, and seedling transplanting can be carried out 7-10 days in advance. Because the seedling stage and early growth stage are in the high temperature and rainy season, the diseases and insect pests of autumn cucumber are serious and the yield is low.

Growth habits of Cucumber

1. Temperature: cucumbers like warmth and are not resistant to cold. The suitable temperature for fertility is 10-32 ℃. Generally, the growth is the best at 25: 32 ℃ in daytime and 15: 18 ℃ at night, the most suitable ground temperature is 20: 25 ℃, and the lowest is about 15 ℃. The most suitable temperature difference between day and night is 10: 15 ℃. The photosynthesis of cucumber was poor at 35 ℃, high temperature obstacle appeared at 45 ℃, and the cucumber was frozen to death at-20 ℃. If the seedlings were refined at low temperature, they could withstand the low temperature of 3 ℃.

2. Light: the South China type variety is more sensitive to short day sunshine, while the North China type variety is not strict on the length of sunshine, and has become a sunshine neutral plant, with a light saturation point of 55000 lux and a light compensation point of 1500 lux. most varieties grow well under the condition of 8-11 hours of short-day sunshine.

3. Moisture: high yield and high water demand of cucumber. The suitable soil moisture is 60-90%. The moisture in the seedling stage should not be too much, and the soil moisture is 60-70%. In the result period, sufficient water must be supplied, and the soil moisture should be 80-90%. The suitable air relative humidity of cucumber is 60-90%. If the air relative humidity is too high, it is easy to get sick, resulting in a reduction in production.

4. Soil: cucumbers prefer wet but not waterlogging, fertilizer but not fertilizer, so it is appropriate to choose fertile soil rich in organic matter. The soil between pH 5.5 and 7.2 is generally preferred, but the pH value of 6.5 is the best.

OK, the above is the planting time of spring cucumber and autumn cucumber. Let's take a look at the common diseases and insect pests and their control techniques in the planting process of cucumber.