In order to prevent the tomato from falling and falling, the more fruit hormones used in production are 2,4-D and anti-fallin. Farmers should pay special attention to the following points during their use:
Use concentration
The concentration of 2,4-D is generally 10ppm-20ppm, the concentration of the use of the anti-fallin is generally 20ppm-40ppm, the lower limit of the concentration is taken at high temperature, and the upper limit of the concentration is taken at low temperature. Before use, the flowering test should be carried out first, and several normal flowers should be smashed first. If the ovary begins to expand after 4-5 days, it indicates that the concentration is suitable; if the ovary begins to expand within 3 days, the concentration is too high; There is no swelling in the ovary, indicating that the concentration is too low.
2. Use time
It is best when the flower is seen when the flower top is yellow and not completely open or the flower is scalloped. It is easy to cause burnt flowers too early, and it will not work until the flowers are lanterns too late. In the sunny afternoon, the flowers are better. In the morning, the scent of the flowers will change due to the condensation on the surface of the plants, causing phytotoxicity.
3. Treatment site
Lightly apply the prepared solution to the flower stalk or peduncle with a brush, or soak the whole inflorescence in the solution. Do not sprinkle the solution on the young leaves or growth points of the plant during the treatment, otherwise the leaves will become strips. Fern leaves, slow growth, especially 2,4-D, the most susceptible to phytotoxicity.
4. Fertilizer supply
The use of hormonal flowers can prevent falling flowers and promote fruit hypertrophy, but there is no fertilizer effect. Therefore, after using hormones, it is necessary to scientifically and reasonably topdress and strengthen management. In addition, after the first ear fruit is used with the fruit hormone, the other ear fruits should be used. Otherwise, the fruit below absorbs a lot of nutrients, and the above-mentioned ear does not receive the necessary nutrients, and the phenomenon of falling flowers and falling fruits will occur.
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Sprinkler irrigation and micro-irrigation automatic control equipment With the development of economy, water resources, energy shortage and labor cost increase, more and more water-saving irrigation systems will adopt automatic control. This article focuses on the advantages and classification of automated irrigation.
The advantages are as follows:
(1) It is possible to truly control the amount of irrigation, irrigation time and irrigation cycle in a timely and appropriate manner, thereby increasing crop yield and significantly improving water utilization.
(2) Saving labor and operating expenses.
(3) The work plan can be arranged conveniently and flexibly, and the management personnel do not have to go to the field at night or other inconvenient time.
(4) Since it can increase the effective working time every day, the initial capital investment in pipelines, pumping stations, etc. can be reduced accordingly.
classification:
First, fully automated irrigation system
The fully automated irrigation system does not require direct human involvement. The pre-programmed control procedures and certain parameters that reflect the water requirements of the crop can automatically open and close the pump for a long time and automatically irrigate in a certain order. The role of the person is simply to adjust the control program and overhaul the control equipment. In this system, in addition to emitters (heads, drip heads, etc.), pipes, fittings, pumps, and motors, it also includes central controllers, automatic valves, sensors (soil moisture sensors, temperature sensors, pressure sensors, water level sensors, and rain sensors). Etc.) and wires.
Second, semi-automatic irrigation system
In the semi-automated irrigation system, no sensors are installed in the field. The irrigation time, irrigation volume and irrigation period are controlled according to pre-programmed procedures, rather than feedback based on crop and soil moisture and meteorological conditions. The degree of automation of such systems is very different. For example, some pump stations implement automatic control, and some pump stations use manual control. Some central controllers are only one timer with simple programming function, and some systems have no central control. The controller, but only some of the sequential switching valves or volume valves are installed on each branch pipe.
Automated irrigation is the trend of the times. In the future water-saving irrigation projects, more and more automated irrigation systems will be applied.
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