Low temperature is one of the major hazards of cucumber cultivation in greenhouses in winter and spring. In addition to selecting the type of early-maturing high-quality products that should be resistant to low temperatures, low light, and strong disease resistance, how to manage greenhouses is the key to a successful winterization of crops.
one. The main performance of cold hazards
1. Victims of leaf-bearing leaves are often victims of mild damage. If they are victimized at the cotyledon stage, they show chlorosis on the edge of the cotyledon, with white borders, and normal temperature does not affect leaf production. After planting, the plant suffered a short-term low-temperature or cold-wind invasion, and the leaves of some plant parts were frozen and dark green and gradually dried off.
2. In the winter and spring season when the root system is damaged, the temperature in the greenhouse is low, and the ground temperature also falls below the minimum temperature at which the roots grow. Root growth stops, new roots cannot be proliferated, some old roots yellow, and gradually die, causing turbid roots, when the temperature suddenly When it rises, the plants appear wilting or the growth rate slows down. If it is seriously affected and it is difficult to resume growth, it is necessary to change the seedlings again.
3. The damage to the growth point of the affected cucumber at the growing point is a relatively serious frost injury. It often causes the top buds to be frozen without new leaves. If this condition cannot be restored after the weather has warmed up, it must be supplemented separately.
4. Flowering and fruiting victims suffer from cold weather during cucumber flowering, affecting the pollination effect, or can not be fertilized, resulting in a large number of fallen fruit or fruit.
two. There are good recipes for resisting low temperatures. As we all know, the traditional methods of preventing low temperatures include outdoor insulation (increase greenhouse cover, outside the greenhouse), plastic film coverage, and spot heating furnaces. Beijing Huaxia Kangyuan Technology Co., Ltd. is committed to the research and development and production of biotechnology. The warming agent of Gembaum greenhouse is a multi-functional green product. It uses the principle of aerobic fermentation to allow functional microbial fermentation of straw to produce crops. Heat and carbon dioxide as well as the organic matter needed for the soil. Has good economic and ecological benefits.
1. Warming and heat preservation effect is obvious: generally can increase the ground temperature of 20 centimeters from 4 to 6 degrees Celsius, and the average temperature is increased by 2 to 3 degrees centigrade. Early spring crops can be planted 10-15 days in advance, and the fixed value can be 10-20 days ahead of time, germination, flowering, and results. Late crops (late crop delay) can extend fertility for more than 30 days.
2. The concentration of carbon dioxide increases exponentially: The warming agent in the greenhouse can increase the concentration of carbon dioxide in a certain area of ​​the greenhouse by 4 to 6 times, the water use efficiency by 80% to 150%, and the photosynthetic efficiency by more than 50%.
3. Good effect of disease prevention and disease resistance: Practice has proved that the use of greenhouse warming agents can reduce pesticide dosage by more than 70%, and some can even do basic use of pesticides instead of chemical pesticides. The environmental protection effect is extremely significant.
4. Good effect of improving soil fertility: Gembo greenhouse warmer can increase soil organic matter and humus, enrich the population structure of soil beneficial microorganisms, and can greatly improve the soil physical and chemical properties, such as soil pellet structure, aeration, water retention and fertility, etc. Both can be significantly improved, and the root number and root fresh weight increase accordingly.
5. Significant economic benefits: Increase input-output ratio. Using greenhouse warmers, greenhouses can increase production by an average of 30-50% per mu, and the input-output ratio can reach 1:20 or higher, and waste utilization and benign circulation mechanisms can be formed.
The specific operating steps for making straw bioreactors include: ditching, straw stalking, sifting, straining, soil covering, watering, ridge forming, drilling, and planting. In cucumber cultivation, the following points need attention:
1. The amount of straw and strain should be sufficient.
2. The two straws in the built-in ditch should expose the steamed bread.
3. Ditching should not be too deep, generally not more than 25cm.
Details can be consulted: Beijing Huaxia Kangyuan Technology Co., Ltd. Telephone toll-free hotline Website: Taobao Website: http://shop35396982.taobao.com
Recommended reading:
1. How can a greenhouse warm up better in winter?
2. Autumn greenhouse high yield management technology
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