How to keep greenhouse roses alive
Share knowledge about how to keep greenhouse roses alive and the cultivation and management of greenhouse rose flowers, the specific content is as follows:
In the summer, as the temperature rises daily, the following problems exist in the growth of roses in the greenhouse:
One, the plant body of greenhouse roses in high heat during the day increases transpiration of water, strengthens respiration, reduces the accumulation of plant nutrients, and the whole plant appears weak.
Two, the temperature inside the greenhouse is high in summer, and the surface water evaporates quickly. As a result, under the action of water粘力, it will bring the soil salt from the deep layer of the surface to the surface layer, causing damage to some new roots, making it difficult for the plant to absorb water and fertilizer, and eventually leading to the phenomenon of "small old plants."
Three, in a high-heat environment, if the frequency of watering is not increased to keep the surface moist, it will inevitably lead to an increase in surface salt content and a decrease in air humidity, creating a favorable environment for the growth of mites, making it difficult to control mites. However, if the frequency of watering is increased, it will result in excessive loss of water and fertilizer, faster hardening of the surface soil, and the possibility of long-term waterlogging in some areas.
In response to the problems that arise in the production of greenhouse roses in the summer, there are several production management measures for reference by rose producers:
One, prevent flooding
Entering summer is the peak season for annual floods. Therefore, before the flood season arrives, it is necessary to clear the field weeds and water channels around each greenhouse to facilitate drainage and flood discharge during the flood season.
Two, turn on the greenhouse cooling facilities
1. Install a silver-gray shading net with a shading rate of 35% to 45% inside the greenhouse;
2. Open the greenhouse skylight every day in a timely manner;
3. Greenhouses with sprinkler equipment should use sprinkling appropriately.
This can keep the maximum temperature at a height of about 1.50 meters from the ground in the clear day to below 35 degrees Celsius and maintain the relative humidity of the air above 55%. This forces the plant to reduce water transpiration, lower respiration, and create conditions for the accumulation of nutrients in the plant. Ultimately, laying the foundation for the production of high-quality cut flowers in the summer greenhouse rose production.
Three, strengthen field management of the plant
1. Cover the planting surface with a 2 to 3 cm thick moisture-retaining covering material (fermented soft). For example: sawdust, crushed agricultural by-products, etc., to keep the surface moist, reduce surface water evaporation, achieve a decrease in the EC value of the shallow soil layer, increase the humidity of the upper layer of the soil surface, reduce the temperature of the plant population, and create favorable conditions for the growth of young roots in the underground part and the healthy growth of young branches in the above-ground part.
2. Shape the plant in a timely manner and coordinate the growth of the underground and above-ground parts. When greenhouse roses enter summer, they sprout quickly and produce many branches, but there are more weak branches and fewer strong branches. If the shaping is too large at this time, it will inevitably cause disharmony in the growth of the above-ground and underground parts, resulting in withered stumps and dead seedlings or the appearance of "small old plants." However, if the plant is left to grow naturally, it will lose the meaning of growth. Therefore, timely removal of weak branches and tender stubs to ensure that each plant has 4 to 5 healthy nutritional branches is an effective method to reduce nutrient consumption of the plant body, coordinate the growth of the above-ground and underground parts, and create a suitable microclimate for plant growth. It is also an important measure to produce high-quality cut flowers in the summer.
3. Scientific watering. In the summer greenhouse rose production, the amount of water evaporation is high, and the degree and amount of watering have明显 changed, with the watering time extended and the interval between watering shortened. Although this keeps the surface moist, it can easily cause the surface soil to harden, the loss of fertilizer and water, long-term waterlogging of the lower roots in some areas, resulting in more dead roots than living roots, ultimately leading to a decline in product quality and an increase in production costs. The key to achieving scientific watering of greenhouse roses in the summer is to sprinkle soft and breathable moisture-retaining covering materials on the surface, allowing them to lock in some of the surface evaporation water and some irrigation water, extend the time for the surface to stay moist, reduce the amount and frequency of watering, prevent the surface soil from hardening, increase soil oxygen content, promote healthy root growth, and ultimately achieve deep roots and lush leaves, producing high-quality cut flowers.
4. Systematic control of mites. Mites are the most common and cause the greatest harm to greenhouse roses in the summer. They can cause poor growth of rose plants, malformed leaves, fading leaves, and delayed shooting and germination. Systematic control of mites first requires the removal of excessive branches and leaves from the plant to allow the medicine to reach the dead corners. Next, lower the greenhouse temperature and increase air humidity. Finally, alternate the use of different formulations of miticides to ultimately eliminate the harm caused by mites on greenhouse roses.
The above is an introduction to how to keep greenhouse roses alive and the methods of cultivation and management of greenhouse roses for reference.