Chinese
It is good to accuse temperature to plant wintry canopy cucumber
From;    Author:Stand originally
Kind wintry canopy cucumber, temperature management is crucial, different birth period, administrative temperature is endless also and identical. According to cucumber each bear period to have adjusting control to the requirement of temperature, it is the key that raises yield of wintry canopy cucumber.

1. Cucumber grows the growth demand to temperature: Cucumber happy event is lukewarm need constant difference in temperature again, during bearing, with 15 ℃ 30 ℃ are hale plant birth temperature, 2 ℃ of 0 ℃ ~ are freeze to death temperature, the cucumber suiting to microtherm ability and drop in temperature urgent delay, exercise degree to concern, without the plant that take exercise, 10 ℃ of ~ of 5 ℃ suffer freeze injury possibly, 3 ℃ of 2 ℃ ~ can freeze to death; The plant that the course exercises can be enduring the low temperature of 3 ℃ , the 0 ℃ of short time are unapt also suffer freeze injury. Plant of 35 ℃ above grows undesirable, more than 40 ℃ can bring rise and fall to spend premature drop.

Root system is more sensitive to the reaction of ground temperature, ground temperature falls to suffocate suffocate of activity of physiology of 12 ℃ root system, ground temperature falls 8 ℃ the following root system cannot stretchy, optimum ground temperature is 25 ℃ , lowest 15 ℃ , assure on production cannot under 13 ℃ .

2. Sow the temperature before reaching grafting: The air temperature before seedling comes up out of land should master in 25 ℃ ~ 30 ℃ , nightly 20 ℃ of 16 ℃ ~ , ground temperature 25 ℃ of 20 ℃ ~ . Seedling comes up out of land to the first true leaf period, air temperature is 24 ℃ ~ by day 28 ℃ , nightly 17 ℃ of 15 ℃ ~ , ground temperature 18 ℃ of 16 ℃ ~ .

3. The temperature after grafting manages: The air temperature of before 3 days of seedbed after grafting should maintain in 25 ℃ ~ 28 ℃ , nightly 20 ℃ of 18 ℃ ~ . After 3 days 20 ℃ ~ are 25 ℃ , nightly by day 15 ℃ of 12 ℃ ~ , should build heat preservation of careless cover with a straw mat under 12 ℃ .

4. The temperature after field planting manages: Delay seedling stage by day 30 ℃ of 28 ℃ ~ . Nightly 18 ℃ of 15 ℃ ~ . 28 ℃ of ~ of before knot melon coming after delay seedling 25 ℃ , nightly 15 ℃ of 12 ℃ ~ , the temperature outside wanting canopy only does not close wind gap under 12 ℃ , execute be on the lookout of day and night.

5. Written guarantee the temperature of melon period manages: Written guarantee melon period is worth winter, temperature is inferior, want to strengthen temperature management. In the morning 8 when to afternoon 13 when, air temperature should be controlled in 25 ℃ ~ 30 ℃ , more than 28 ℃ are about to let in fresh air, afternoon 13 ~ 17 when should maintain in 25 ℃ ~ 20 ℃ , fall to should close wind gap to 20 ℃ , 17 ~ 24 when with 15 ℃ ~ 20 ℃ are advisable, 0 ~ 8 when with 12 ℃ ~ 15 ℃ are advisable.
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