Recently, according to the work requirements of the “Science and Technology Demonstration Technology Promotion Projectâ€, technical instructors went to the countryside for technical guidance.
Entering the number nine, with the gradual cold temperature, the temperature of the soil in the solar greenhouse without warming decreases, and the temperature in the shed indoors is as low as 4° C. and even 0° C. as early as 4-7. This temperature makes the carnations dormant and grow stagnant. , weakened resistance to stress, difficult nutrient absorption. In the face of low temperature and low sunshine, prone to diseases and insect pests, production management is difficult, and the production of flowers is low, the technical instructor proposes according to some common management techniques in the guidance of the countryside:
First, do a good job of greenhouse warming. When dehumidified, in the morning after the start of squeezing, when the temperature in the greenhouse rises to 25°C, exhalation and dehumidification are performed, and the number of irrigation times is reduced.
Second, rational fertilization. In winter, the temperature and the ground temperature in the greenhouse are low, and the absorption and utilization of urine peptide nitrogen is poor by the plants. Nitrate nitrogen is used when topdressing nitrogen, such as potassium nitrate.
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