When rice is planted, there is no yellowing of rice leaves. If it is not solved in time, the impact on yield is still quite large. In fact, there are many reasons for causing yellowing of rice, such as pests and diseases, phytotoxicity, poisoning, deficiency and so on.
Below, the 4 points that Xiaobian said are more common. If the yellowing of their own rice occurs, they can be compared and then symptomatic:
1, toxic yellowing
The yellowing of rice leaves caused by poisoning is actually a good judgment. From the root point of view, the symptoms of blackening are obvious. In addition, there is a smell of rotten eggs, which is very obvious. In this case, the first step is to drain the fields. The purpose is to get more oxygen in the soil, detoxification through oxygen, and then you can apply compound fertilizer or spray foliar fertilizer to promote the greening of rice.
2, lack of nitrogen and yellow
Nitrogen deficiency is the first question that everyone thinks, because once the leaves appear yellow, many people's first reaction is the lack of elements. Indeed, nitrogen deficiency can cause rice yellow leaves, and it is easier to judge. The leaves begin to yellow, gradually spread like heart leaves, and finally develop into yellowing of the whole plant. From a distance, it is the same as maturity. At this time, it is enough to apply urea. It is recommended to start the application in the early stage of yellowing. Don't wait until the whole plant turns yellow, it's late.
3, herbicide remedy yellow
Yellow leaves caused by herbicide phytotoxicity, light leaves usually yellow spots, then rice withered, cyanosis, serious direct death of the whole plant, herbicides are not much to say, if not before the herbicide Normally, not long after the herbicide was applied, the above symptoms began to appear, which was caused by the phytotoxicity. If it was found earlier, spray water as soon as possible to reduce the concentration of the herbicide. If it is found later, the rice has withered, then Hopeless.
4, bacterial disease yellowing
There are many bacterial diseases that can cause yellowing of rice leaves, such as bacterial blight, bacterial stripe disease, bacterial base rot, etc. After infection, the heart leaves of rice will wither and curl, if it is bacterial Stripe disease, the diseased plant will be broken, there will be yellow "bacterial pus", if it is a bacterial base rot, the diseased plant will be broken, there will be a rancid smell, bacterial disease, it is not difficult to prevent it. Commonly used agents are leaf azole, agricultural streptomycin sulfate, thidium copper, etc., not once again, about one week apart, once again.
The above is about the yellowing of rice leaves and the prevention and treatment methods. Of course, there are other reasons or other prevention and control measures. If you have a better method, you can also leave a message in the comments below. Let's learn together.
Transforaminal Endoscopy Instruments
We're professional Transforaminal Endoscopy Instruments manufacturers and suppliers in China, specialized in providing high quality medical instruments with reasonable price. We warmly welcome you to buy or wholesale bulk Transforaminal Endoscopy Instruments for sale here and get quotation from our factory.
Transforaminal Endoscopic,Transforaminal Locating Ruler,Transforaminal Biting Forceps,Transforaminal Endoscopy Instruments
Tonglu WANHE Medical Instrument Co., Ltd , https://www.tlvanhurhealth.com