First, the light adjustment method should be based on different vegetables on the light intensity and the length of light different scientific management. Hi-light vegetables include melons, solanes, beans, and root vegetables; low-light-tolerant vegetables include leafy vegetables, onions and garlic; hi and low light vegetables include mustard and edible fungi. In addition to rational arrangement of sheds and indoor crop layout, cultivation should also adopt appropriate adjustment methods. 1. One way to increase the light intensity is to manually supplement light. In winter or rainy days, with fluorescent lighting, 100 watts per square meter, fluorescent lamp 30-40 cm away from the seedlings, the daily lighting time should be based on the type of vegetables and weather conditions. Conditional mercury-fluorescent lamps supplement the lighting better. The second is to use reflected light to improve lighting conditions. For example, if the interior wall of the greenhouse is painted white and a polyester reflective film is placed near the pillar in the greenhouse, the light intensity in the greenhouse can be increased. 2. Shorten the sunshine time method For cucumbers and other short-lived vegetables, when the sun shines during the seedling stage, at the same time, the night temperature is reduced to 15-17 degrees, which can promote female flower differentiation and increase yield. Therefore, during the early spring cucumber seedling cultivation, the short-day treatment can be performed by means of late-excavation and early-grazing. 3, the method of weakening the light intensity summer heat season, can be covered by shade nets, or plant some such as bergamot loofah, loofah, bitter gourd and other shade crops to weaken the light intensity. Second, the temperature adjustment method 1, to improve the insulation method of the first room is to use low temperature, anti-aging insulation film, practice has shown that the drop film than the non-drip film insulation is good, infrared baffle film, multi-functional film than the film Polyethylene film insulation is good. The second is multi-layer coverage. In the greenhouse, two curtains are hung, with a small shed inside and a straw cover to significantly increase the temperature of the greenhouse. 2. One way to increase the temperature of the soil is to use a bed in a shed or 20 cm above the ground. The second is the use of hot crops or electric hotbed nursery. The third is to dig out the cold outside the greenhouse. The fourth is to cover the shed with a mulch. 3, reduce the temperature inside the shed method First, you can take ventilation and cooling. When the indoor temperature in the summer shed reaches 30 degrees, ventilation can be used to cool down. The second is to cover the shade net and reduce the temperature of the non-woven fabric. The third is watering and cooling. Third, the adjustment of moisture method To reduce the temperature inside the shed, you can use furrow irrigation method, should be carried out in the morning or evening on a sunny day, and the ventilation should be large ventilation. The conditionalist is best to use spray irrigation or drip irrigation, because these two irrigation methods can maintain good air permeability. Fourth, the condition of the gas method 1, the adjustment method of carbon dioxide gas can be used ventilation, laying organic fertilizer and other brewing hot crops, carbon dioxide gas fertilizer and other methods to adjust the indoor carbon dioxide concentration. 2, toxic gas control methods improper management of the greenhouse, often produce chlorine, ammonia, nitrite gas, sulfur dioxide and other toxic gases and affect the normal growth of crops. Prevention measures: First, use safe and reliable agricultural film and plastic products; sheds cannot stack old plastic products to prevent toxic gases from being generated at high temperatures. The second is to apply sufficient organic fertilizer, topdressing fertilizer (as little as possible ammonium nitrate) should be immediately watered and ventilated. Third, do not stack fertilizers, pesticides, plant hormones, chemical herbicides, etc. in the shed.
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