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How to manage frost farming? Thermophilic vegetables in Solar Greenhouse

DailyBird Culture 2021-10-09 1 0
The

frost season is coming, the weather is getting colder and colder, and frost begins to appear. The production of non cold resistant open field vegetables is about to stop at this time. It is the time when farmers are busy harvesting. At the same time, they also need to pay attention to the management of vegetables in protected areas. Then let the old yellow calendar introduce to you how to manage warm vegetables in solar greenhouses after frost. In the frost season of

,

, 霜降农事,

and

, the warm crops such as tomato, eggplant and pepper in autumn and winter stubbles and over winter stubbles are in the flowering and fruiting period. Growers should strengthen management and promote more fruits with high commodity rate. After

and

intertillage loosen the soil and slow down the seedlings, control watering and squatting the seedlings, and intertillage for 1-2 times when the soil moisture is appropriate to promote root growth, lay a foundation for high yield, and eradicate weeds at the same time.

and

are used for cold proof and thermal insulation. The bottom of the shed film is buried with soil, and the rear window is filled with broken grass. The outside is sealed with foam board or straw curtain, while the exhaust fan holes and other gaps are also sealed with thermal insulation materials. When the outside temperature drops to 15 ℃ at night, it shall be covered with thermal insulation materials such as thermal insulation quilt or straw mulch. Materials with good thermal insulation shall be selected, and the thickness of the thermal insulation quilt shall be more than 2 cm, with waterproof function; Straw mulch shall be thick and evenly distributed, and the weight per square meter shall be about 3.5kg.

and

adjust the appropriate temperature and humidity, keep the temperature in the greenhouse at 23 ℃ - 28 ℃ during the day and 15 ℃ - 18 ℃ at night. The indoor relative humidity is adjusted according to different crops, with tomato and eggplant at 45% - 50%; Sweet pepper and cucumber are 60% - 80%. During ventilation, the ventilation time shall be determined according to the temperature change before and after noon. If the external temperature is lower than 5 ℃, the ventilation time shall not exceed 30 minutes, and it shall also be properly ventilated on cloudy days.

and

should be watered scientifically. The main goal is to promote root control and seedling control after delaying seedling and before young fruit expansion stage, and should not be watered as far as possible. The water demand from the initial stage of fruit harvest to the peak fruit bearing stage is large, and it is generally irrigated once every 5-7 days. The specific watering time depends on the weather, crop growth and soil. Cucumber and pepper should be more frequent; The interval between tomatoes and eggplants should be longer, and the watering time should be in the morning.

and

plant adjustment and fruit management. The vine shall be hung in time 15-20 days after planting. Two rows of each border shall be hung with silver gray rope, which can avoid aphids; Timely circle the seedlings, drop the seedlings, branch, and remove the old and yellow leaves at the lower part. Fruit type cucumber leaves melons from the sixth leaf, and the young melons with 1-5 leaves should be removed as soon as possible; When tomato and eggplant have 3-4 flowers per spike, shock pollinator or bumblebee is released to assist pollination, so as to remove excess young fruits and deformed fruits as soon as possible. Cucumber can bear fruit by itself. It does not need to dip flowers with growth regulators. It is forbidden to use hormones such as "shunzhiling" to treat flowers.

and

balanced fertilization. When the first ear of tomato is 2-3 cm in diameter (Walnut size), topdressing should be carried out in time. 5kg-8kg of "Christmas tree" instant fertilizer with a ratio of 16:8:34 of nitrogen, phosphorus and potassium can be applied with drip irrigation per mu, or 8kg-10kg of liquid fertilizer with a ratio of 15:5:25 of nitrogen, phosphorus and potassium can be applied with water; The balanced application of fertilizer plays a key role in improving quality and yield and preventing tendon rot. After that, apply fertilizer once when the fruit of each panicle expands. Eggplant, sweet pepper, cucumber and other crops began topdressing in the early stage of fruit expansion.

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