I. Factors affecting the effects of plant growth regulators
The first is the internal factor. The second is the site environmental factors
1, types and varieties
For example, paclobutrazol used in peach trees, cherries, hawthorn and other crops had a strong reaction in the past, but it was obvious in the second year of use on apples. This has a lot to do with the type and amount of hormones that the tree itself contains. In addition, the differences between the varieties have also changed significantly.
2. Crop strength and development stage
The growth of normal, robust crops, the use of regulators, the effect is obvious, the growth is too weak, it is prone to phytotoxicity. Because of the different levels of endogenous phytohormones in the body during development, the effect of the external regulator is different.
3, organs and parts
When the concentration of auxin reaches the germination and growth, it will inhibit the growth of roots. When the concentration is high to promote the growth of the main stem, the growth of the buds will be inhibited. Therefore, the roots, stems, leaves and buds of the same plant have auxin concentration. The response is very different.
4, light
Light energy promotes photosynthesis and transpiration of leaves, which facilitates the transport of carbohydrates and growth regulators in leaves. Light can also make the pores open to facilitate the penetration of the regulator from the pores, but the light is too strong, and the leaf drops are easily dried to solid or evaporated, which is not conducive to the absorption and utilization of the liquid. Therefore, spraying the drug should avoid the glare period.
5. Temperature and humidity.
The temperature at the time of spraying is closely related to the permeability of the stratum corneum of the leaves. Generally, the liquid with high temperature and high permeability is easy to enter the plant body, and the temperature is low, the permeability is small, and the penetration of the drug solution has little effect on the drug. When the humidity is high, the stratum corneum of the leaf surface is in a hydrated state, which can prolong the liquid time of the drug drop, and can enhance the absorption and utilization rate, and vice versa.
6, soil
The ability of clay to adsorb chemicals is strong, and the adsorption capacity of sand land is poor. The application of the same concentration of inhibitory agent clay is more effective than sand land, and it is more obvious that it is applied with paclobutrazol.
Second, matters needing attention
1, experimental data
The effects of plant growth regulators can only work under certain growth and development stages and certain environmental conditions, because each local climate, variety and cultivation method are different, so a small range of experiments must be carried out before use.
2, cultivation measures
Growth regulators can regulate the growth and development of crop roots, stems, leaves, flowers and fruits, which can increase production and improve quality, but it can not replace the demand for temperature, humidity, light, water and fertilizer during crop growth, so it is strengthening The use of regulators based on management levels can make a difference.
3. Use concentration and time
The size of the crop using the modulator dose is very different for its response. When the application period is timely, the use of the regulator is in a specific stage of growth and development. It is impossible to achieve the desired effect too early and too late, and it will cause phytotoxicity and side effects.
4, how to use
The agent works by absorption through the leaves or the young shoots. The growth-promoting class can be sprayed whole plant, and the inhibition class is the top spray. Adding specific additives can also increase the absorption rate of the drug. Some regulators should also be finely sprayed with mist and sprayed on the front and back. For example, defoliation products should be sprayed carefully and carefully.
5, chemical storage time and mixed use
Generally, plant growth regulators should be used now. It is not allowed to store the formulated agents for too long, which will reduce the efficacy, because many plant growth regulators are poorly water-soluble, especially in the case of mixing with other agents. Change affects the effect. There is also a part of the conditioning agent that is easily decomposed by light, and the longer the storage time, the worse the effect.
In short, the use of regulators in the production process must put safety first, strictly in accordance with the concentration of the drug, the period of use and the number of uses for safe use.
Temporary Fencing Panel
Temporary fence is suitable for temporary isolation, temporary partition, temporary circle around, is a highly flexible product. Temporary guardrail from the process point of view can be divided into two kinds: 1. Temporary guardrail welded mesh 2. Braided mesh temporary guardrail. The main use of removable components will be the main guardrail with the base or guard column for standard connection, such as the specific needs of the time can be easily removed, for moving installation.
Main structural features: Mesh is relatively compact, strong base security, handsome in appearance, according to customer needs custom-made production.
Mesh size: 50X50mm 50x100mm 60X150mm ect
Tube size: Round tube and square tube
Tube thickness: 1.2mm 1.5mm 1.8mm ect
Mesh Diameter: 3mm 4mm 5mm
Panel size: 1.8X2.1meter 2.1X2.4meter ect
Packing: Nake or on pallet
All other similar products we can supply, please send your details to us.
Fence Gate,Gate And Aluminum Fence,Fence And Slide Gate,Safety Fence
HEBEI ZIFENG NEW ENERGY TECHNOLOGY CO.,LTD. , https://www.zifengpipeline.com