Recently farmers have reported that fruit cracking occurs after tomatoes are set and tomatoes are cracked, which results in a decline in tomato yield and quality, which directly causes damage to farmers.
There are many reasons for the cracking of tomatoes, mainly due to the following aspects, and they hope to help farmers growing tomatoes.
First, spend time or concentration of pods. After the flowering of the tomato, flowering is mainly to prevent flowering and fruit drop, increase the fruit setting rate, accelerate the speed of fruit enlargement, promote fruit ripening, and increase early yield. However, if the flowering time is too early or too late, the normal fruit growth will be affected. If the young bud is easy to produce empty fruit; when the petals are not developed, it is easy to form a stale fruit; the calyx is bent back into a round or nearly circular shape; when the color of the petals is dark, the flower is easy to produce cracks, and when the concentration is too large, it will also Cracking occurs.
Second, improper management. If the tomatoes are in the late stage of fruit development or color transformation, they encounter long-term high temperature and drought, and then they suddenly water afterwards. If the growth of the pericarp is not in sync with the speed of the pulp tissue expansion, it will easily produce cracks. Greenhouse tomatoes, after planting live trees, in order to prevent plant growth, generally do not water before the early, but should keep the soil moist, the results of the size of the walnut should be often watered to maintain the soil moisture content of about 80% to avoid the soil too dry wet.
Third, the temperature difference. The suitable temperature for tomato growth is 18-25°C. When the average daily temperature drops to 13°C, it can still grow slowly. Below 13°C, the growth of vegetative growth is extremely slow, and over-nutrition leads to over-differentiation of flower buds, which often results in abnormal fruit development. The temperature difference between day and night is too large. The difference between the thermal expansion and contraction of tomato skin and pulp is large, which can lead to cracking of some thin-skinned varieties.
IV. Excessive application of nitrogen fertilizers leads to deficiency of nutrients or lack of nutrients in the soil; a large amount of potash fertilizer is required during fruit enlargement, and the demand for nitrogen fertilizers is reduced. If a large amount of nitrogenous fertilizer is used and the amount of potassium fertilizer is neglected, the lack of potassium in fruit will directly affect the Absorption of boron and calcium; In addition, high temperature or low temperature affect tomato's absorption of boron and calcium and other trace elements, and due to lack of shed will lead to fruit cracks in the fruit surface, so the lack of calcium and calcium is the main cause of tomato cracking.
Control methods:
First, we must take good care of the time, should be before 10 o'clock in the morning or after 3 o'clock in the afternoon, plants without dew, the temperature of 18-20 °C is appropriate, to avoid increasing the concentration of liquid medicine.
Second, to timely watering to avoid the soil too dry or too wet, temperature and humidity control, high temperature ventilation, low temperature and warm, to avoid excessive temperature.
Third, the temperature management should be appropriate; in the production of tomatoes, should control the appropriate temperature, to avoid the temperature is too high or too low, pay attention to the temperature difference between day and night can not be too large.
Fourth, control the use of nitrogen fertilizer, increase the application of phosphorus and potassium fertilizers and humic acid water-soluble fertilizer, spray boron fertilizer containing calcium foliar, to avoid cracking fruit due to lack of tomatoes.
Everything You Need To Know About LED Lighting
LEDs are a simple invention with huge potential to change the lighting industry for the better. Don`t know much about them? Here are three big things you need to know to get your feet under you:
1.What Does LED Stand For?
2.LED stands for light-emitting diode.
A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows - characteristically in only one direction (in through the anode and out through the cathode). Diodes are generally made from semi-conductive materials such as silicon or selenium - substances that conduct electricity in some circumstances and not in others (e.g. at certain voltages, current levels, or light intensities).
2.A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. It is essentially the opposite of a photo-voltaic cell (a device that converts visible light into electrical current).
Did You Know? There is a similar device to an LED called an IRED (Infrared Emitting Diode). Instead of visible light, IRED devices emit IR energy when electrical current is run through them.
1.How Do LED Lights Work?
2.It`s really simple actually, and very cheap to produce, which is why there was so much excitement when LED lights were first invented!
The p-type and n-type materials are created by introducing the original material to atoms of another element. These new atoms replace some of the previously existing atoms and in so doing, alter the physical and chemical structure. The p-type materials are created using elements (such as boron) that have less valence electrons than the intrinsic material (oftentimes silicon). The n-type materials are created using elements (such as phosphorus) that have more valence electrons that the intrinsic material (oftentimes silicon). The net effect is the creation of a p-n junction with interesting and useful properties for electronic applications. What those properties are exactly depends mostly on the external voltage applied to the circuit (if any) and the direction of current (i.e. which side, the p-type or the n-type, is connected to the positive terminal and which is connected to the negative terminal).
Application of the Technical Details to LED Lighting:
When a light-emitting diode (LED) has a voltage source connected with the positive side on the anode and the negative side on the cathode, current will flow (and light will be emitted, a condition known as forward bias). If the positive and negative ends of the voltage source were inversely connected (positive to the cathode and negative to the anode), current would not flow (a condition known as reverse bias). Forward bias allows current to flow through the LED and in so doing, emits light. Reverse bias prevents current from flowing through the LED (at least up until a certain point where it is unable to keep the current at bay - known as the peak inverse voltage - a point that if reached, will irreversibly damage the device).
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