Identification of Diseases of Edible Fungi and difficulties of hydroponic Flower cultivation in Summer

Difficulties in hydroponic cultivation of flowers in summer

First, where are the difficulties of hydroponic flowers in summer?

Hydroponic flowers are used to cultivate ornamental plants in a non-solid medium (water or adding an appropriate amount of plant nutrient solution to water). At present, most of the hydroponic flowers in the family are cultivated in still water, and the dissolved oxygen is lower than 1mg/l, and the flowers barely maintain life in anoxic utensils. With the increase of temperature in summer, the vigorous physiological metabolism of plants, the multiplication of microorganisms, the sharp increase of oxygen consumption, the continuous decrease of dissolved oxygen and the deterioration of water quality, many unfavorable factors are formed for the growth of hydroponic flowers, which may cause root rot and wilting of branches and leaves. even kill the whole flower. Therefore, in summer, in addition to preventing heat and high temperature, increasing the oxygen content of nutrient solution is the key to ensure the safety of hydroponic flowers in summer.

Second, how to improve the content of dissolved oxygen in nutrient solution?

There are many ways to increase dissolved oxygen, which can be summarized as chemical method and physical method. The following are several methods that are easy to operate and effective.

1. Increase the number of times to change nutrient solution

Changing the nutrient solution is the easiest way to increase dissolved oxygen. According to the measurement, the dissolved oxygen content of the fresh nutrient solution is 70%-90% higher than that of the original solution, which can improve the physiological hypoxia of flowers in time.

Flowers that have taken root in water are suitable to change the nutrient solution no more than 7 days in 3-5 days. When changing the nutrient solution, pay attention to the temperature difference between the new solution and the original solution should not be too large, too large temperature difference may cause flower root physiological disorder.

When changing the liquid, we should patiently rinse the roots with clean water, remove withered and rotten roots, and truncate the aged roots to promote the growth of new roots.

If the nutrient solution suddenly becomes turbid, or there are mosquito eggs or mosquito breeding, you should immediately replace the new nutrient solution.

two。 Vibrating oxygenation

For hydroponic flowers with smaller utensils, as long as the root system is clear and the nutrient solution is clear, the vibration method can be used to increase oxygen by fixing the flowers with one hand and gently shaking the utensils with the other hand. After shaking, the dissolved oxygen content of the nutrient solution can be increased by more than 30%.

Hydroponic flowers with turbid nutrient solution and stunted root system should not adopt the method of vibrating oxygen enrichment, and the nutrient solution must be changed thoroughly.

3. Using automatic water exchanger for hydroponic flower culture

The content of dissolved oxygen in flowing water can reach 8~12mg/l, but only 1mg/l in still water. The automatic water changer for hydroponic flowers is designed and made according to this principle. The whole frame is a flower cultivation vessel, which is equipped with a miniature circulating pump. The outlet end of the pump is connected to the set pipe, and the nutrient solution circulates in the pipe when working, increasing the dissolved oxygen for the absorption of flowers. After the pump stops working, the root system maintains a certain liquid level. There is no doubt that the cultivation with automatic water changer is to soak hydroponic flowers in the "oxygen bar", and its growth is obviously better than that of static hydroponics.

The cleaning and changing liquid of hydroponic flower automatic water changer is generally once every 30 to 35 days.

4. Inflate a vessel

If there is a tank of ornamental fish next to the aquarium while cultivating flowers, you can use the spare outlet pipe of the fish tank air supply pump to connect the rubber pipe and put the sand head into the static hydroponic flower utensils to inflate (the airflow is not too large, so as not to splash the nutrient solution), and the effect is also good with the flow of air to increase oxygen.

Third, where should hydroponic flowers be placed in summer?

Most of the flowers selected in hydroponic culture are shade-resistant foliage flowers and flowers and leaves and ornamental flowers. Such as taro, white jade evergreen, silver taro, candle, pineapple and so on. These flowers like to be warm and humid, slightly resistant to shade, and avoid high temperature and dry heat. "hydroponic culture" only changes the cultivation form, but it is impossible to change its growth habits and the required environmental factors. It is best to put hydroponic flowers in bright light, slightly higher humidity, cooler and well-ventilated environment in summer. Avoid direct sunlight, but can not be too shaded, so as not to hinder the photosynthesis of flowers, weaken growth, elongate stem nodes and thin leaves. Resulting in colored blocks, colored flower leaves lose their luster.

Can hydroponic flowers be placed in an air-conditioned room?

Sure. However, hydroponic flowers should not be placed in the air outlet of the air conditioner, the wind speed is too fast will hurt the branches and leaves, light leaves curl, heavy scorched edge withered. It is also considered that the temperature requirement of flowers during the day is higher than that at night. If the air conditioner is turned off at night, the ambient temperature is higher than the daytime temperature when the air conditioner is turned on, which is disadvantageous to the growth of hydroponic flowers.

When turning on the air conditioner, put a basin of water next to the flowers or spray to the leaves to increase the environmental humidity. The flowers are placed far away from the air outlet of the air conditioner, and there is no problem that the temperature difference between day and night is small. (source of information; Agricultural Expo Network)