1. Fertilizer management
In winter, cucumber cucumbers last four to five months, and the total amount of fertilizer required must be large, but it should not be too large every time. This is due to the fact that pumpkin root is more capable of cucumbering than cucumber root and has a wide range of fertilizers, which increases the amount of fertilizer, but it tends to lead to long leaves. Cucumbers are not growing much during a large part of the winter and cannot be watered much, and high concentrations of soil are highly likely to lead to high concentrations of soil and to concentration barriers。
The pursuit of cucumbers by winter follows the following pattern: a manure is to be followed up once after the pick-up of the melon, with an acre containing 15-20 kg of ammonium sulfate; a manure is to be followed around 15 days after low temperatures, with an acre tracing 10-15 kg of ammonium sulfate per acre; special attention is to be paid during the winter season to the fertilization of the leaves, which must not be too frequent, which could otherwise cause medicine and fertilizer damage; after the spring period of guacam, the time between the pursuit of the manurea is to be shortened and the amount of fat is to be increased, with 15 to 20 kg of urea per acre; and after the peak period of the melon, the planting plant begins to age, and the pursuit of fattening and water is to be reduced, so as to encourage the cultivation of the leaves to flow back to the roots and to restore the roots to a certain extent, with a view to extending the period of the melon。
2. Wind management
The greenhouses will be closed for a period of time after planting, so as to ensure humidity, increase temperature and promote slow seedlings, which will be ventilated as necessary to adjust temperature and exchange gas. However, as the weather gets colder, the wind is gradually decreasing. Winds are also required during winter to remove indoor humidity, harmful gases and adjust temperature. However, cold temperatures outside the winter and cold winds are prone to colding and even freezing of cucumbers when they reach a plant or when they are overstretched. As a result, winter vents generally open only the upper vents, which often check room temperature changes to prevent the temperature from falling too low。
In the spring, the weather is warming, the temperature is increasing, and the accumulation of indoor harmful gases is increasing, with a gradual increase in ventilation to adjust temperature and air exchange. In the spring, ventilation must be combined with cucumber frosting. First, it is only possible to open the air from the height of the greenhouse (in principle not less than 1. 7 metres) and not the bottom, to repair the broken vents of the shanty film at any time, and to close the vents immediately when it rains, in order to prevent the frosting spores from entering the room. In addition, high temperatures above 32°c have the effect of inhibiting the emergence of frosts, a problem that needs to be taken into account when venting. When external temperatures stabilize between 14°c and 16°c, they can be carried out overnight, with the exception of showers. The cucumber in the solar greenhouse has been growing under cover, and once the plastic sheeting has been removed, production ends。
