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Vegetable Greenhouse In Winter Without Heating, How To Heat?

Vegetable greenhouse in winter without heating, how to heat?

First, nutrition bowl seedlings. Black plastic bowl nutrition has absorb heat during the day and night insulation mulch effect, put a plastic bowl seedling in the coldframe, the outside temperature is -10 degrees Celsius, therefore the temperature at 6 ~ 7 C, the temperature of the nutrition bowl at 10 degrees Celsius, seedlings grew slowly, from the cold.

Two. Cultivate thermo nutritive soil. Chicken is hot manure, cow dung is the permeability of manure rich mucus, two decomposed from each of 20%, 60% with Yang soil nutrient soil, endothermic heat performance of such a good ecological environment, good seedling, root number and length coefficient, absorption ability, strong resistance to freezing and natural plant.

Three, the root of the seedlings with rooting. The root element is some nutrient elements with calcium, phosphorus and zinc and other related Changgen reasonable compounded. Determine the root diameter of calcium, phosphorus determines root number, root length and growth rate of zinc decided, after the root can be increased by about 70%, deep roots increased by 25%, developed root system, absorption capacity increased by about 70%, an increase of 25% deep roots, roots, absorption capacity increased by about 70%, an increase of 25% deep roots, roots, strong absorptive capacity, will not because of water deficiency caused by poor cold hardiness and frostbite seedling vines.

Four, foliar spraying of nutrients, cold resistance. The cold winter temperatures low light weak, weak absorption ability of root, leaf spraying fertilizer can supplement the photosynthesis, root nutrient deficiencies caused by the absorption of nutrient deficiency. Foliar spray of vinegar and sugar can be antibacterial insecticide, and superphosphate mixed, can increase the mesophyll sugar content and hardness, improve cold resistance. After frost damage, the leaf surface is alkaline atrophy, and the vinegar can alleviate the damage. It should be used 100~300 times. Less or no growth hormone, in order to prevent cold resistance.

Five, foot water insulation, frost damage. Moisture content is higher than air, heat dissipation is slow, indoor soil moisture content is moderate in winter, and porosity of cultivated layer is fine, root system is not suspended, soil is warm and root system is not damaged by freezing. Therefore, the frost damage of rice seedlings is mostly caused by water shortage. For this reason, sufficient water is provided before winter or selected weather (water can be watered at more than 20 degrees). Sufficient water can be used to prevent frost damage.

Six, cultivation, insulation, cold proof. The ground panel knot is limited by the hot gas entering the plough layer during the daytime, and the soil heat storage is little. Besides, the cracks in the soil are large and deep, and the aggregate structure is poor. It is easy to lose heat in the first half of the night, and the room temperature is low at night after the latter, which is easy to cause frost damage. Shallow cultivator can be broken surface cracks, which can control the water transpiration and soil moisture away heat, heat preservation cold seedlings

Seven, sunny days repeatedly. The good performance of the standard greenhouse seedling outside temperature at -10 degrees Celsius, sunny winter morning indoor temperature can reach more than 32 DEG C, a lot of people think this is the best time to promote long freezing temperature on long, not. In fact, this should be repeatedly leaked, making indoor and outdoor temperature difference pull small, and a few days ago near room temperature, were slow to adapt to the environment, healthy growth, a day ten, Meng long, cold, causing flash seedlings and frost.

Eight, carbon dioxide supplement. The ratio of carbon ammonia to crop yield was 1: 1, and the requirement of crop to carbon to nitrogen ratio was 30: 1. At present, most farmers have realized the effect of increasing nitrogen production, but ignored the effect of carbon production. Winter greenhouse vegetables easy leggy chlorosis, 1 hours after the sun will be the evening of crop respiration and soil microbial decomposition of carbon dioxide absorption, around 12 in carbon starvation, high temperature film can be opened and closed into the external carbon dioxide, improve resistance and yield. When the temperature is low, the artificial carbon dioxide is added to the canopy to increase the cold resistance of crops and greatly increase the output.

Nine, timely with insulation cover. General wall thickness of 1 meters. The day heat storage temperature, the release of energy accounted for 50% of the total indoor night to 60%, soil accounted for 20% ~ 30% endothermic heat release, heat storage space accounted for 20% to 30%, according to the temperature in winter and the same day, 1 hours after the cover tarpaulin could remain at room temperature to 18 degrees Celsius, higher than 18 DEG C can later cover cover less than 18 degrees. To cover with earlier.

Ten, the rear wall hanging reflective film warming. Greenhouse vegetables produced in winter, not afraid of cold, afraid of light, even cloudy. Therefore, before the winter solstice, a reflective film is placed on the rear wall to enhance the light intensity of the cultivation bed. At night, the heat energy stored in the wall is released slowly to the interior, which can keep the higher temperature in the latter half of the night to prevent the freezing injury of the seedlings.

Contact: Joy Lee

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