In summer, the greenhouse temperature rapidly rises, causing many problems for vegetable production. High nighttime temperatures are the key to many problems. There is no light at night and organic nutrition is in the state of simple consumption. If the temperature is too high, the respiration will be maintained at a high intensity, which will lead to a large consumption of organic nutrients produced during the day, organic nutrition. Inadequate, making the plant weak, serious drop and fruit drop. Therefore, vegetable farmers must pay attention to the control of the night temperature.
Combination of shading and watering
In order to reduce the temperature in the greenhouse during the day, vegetable growers tried various methods, such as covering the shade nets, spraying cooling agents, pouring mud, etc., but sometimes it was difficult to achieve the intended purpose, which made the plants grow weaker and it was more difficult to flower and set fruit. Although the temperature in the greenhouse is reduced to a certain extent only through the sunshade, the low light environment causes the photosynthetic rate to decrease, and the accumulation of organic nutrients will make the plants weak and have poor results.
Water is a magic weapon for cooling in the summer. Water can be combined with the shade to achieve the purpose of cooling without affecting the normal growth of vegetables. By regularly and rationally watering and spraying clean water (spray irrigation pipeline is still on the ground, but the spout up, or lift the sprinkling pipe lifted) two measures combined, the greenhouse temperature is controlled within the range suitable for the growth of vegetables. Every morning, go into the shed to observe soil moisture and determine if watering is needed. Watering is usually performed in the morning or evening. If there is no time to water in the morning, the temperature in the shed is too high. Water can be sprayed into the shed, and it must not be watered when the temperature is high at noon.
The combination of shading, watering, and water jetting can greatly reduce the daytime temperature in the shed and reduce the amount of heat stored in the shed, which is helpful to reduce the night temperature in the shed.
Reasonable pruning covering straw
In addition to shading and watering, there is another way to reduce the temperature, that is to find ways to avoid seeing the soil in the shed, so that the soil absorbs less heat.
First, rational pruning, adjusting the plant shape to ensure that the branches cover the ridge, so that the sunlight incident on the shed within the plant as much as possible, this will not only increase the photosynthetic area of ​​the leaves, but also reduce the shed within the light area, two birds with one stone . This reminds farmers who grow summer vegetables that they should be careful not to blindly operate in the summer.
Second, cover the crop stalks. Covering crop stalks within a row of vegetable operations is a very effective method of cooling. The principle is very simple, this is equivalent to the greenhouse covered with a "mat", the soil below the straw is cool, just suitable for the normal growth of the root system. With a strong root system, the plant's ability to absorb water and fertilizer is strong, nutrient supply is guaranteed, and the resistance of the crop is also enhanced.
Reduce the storage capacity of the shed wall
An important place for heat storage in the shed is the shed wall, including the back wall and gable of the shed. Can be used to cover the back wall of the greenhouse, such as non-woven fabrics, which can reduce the heat absorbed by the wall.
In the shed wall roots and columns, it is also possible to plant some vine crops such as beans, melons, etc., to reduce the heat storage capacity of the shed walls and columns. Cement pillars, fast heat absorption, rapid heat release, as much as possible in the cultivation of beans so that the vines in the column around the circle, all the columns will be wrapped, can effectively reduce the absorption of heat.
Nucleic Acid Extraction Reagent Kit 300T(manual)
Nucleic Acid Extraction Reagent Kit is designed for isolating viral DNA and RNA from various sample types using superparamagnetic bead technology, the extracted nucleic acid is applicable for the downstream molecular detection,such as PCR, real time-PCR or Sequencing.
nucleic acid extraction,nucleic acid purification,dna rna extraction,rna isolation,nucleic acid extraction reagent
Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimed-global.com