Before planting crops, we should disinfect the soil to improve the yield and quality of crops. Most flower friends use chemical pesticides or dry heat or steam to disinfect the soil. But some smart flower friends want to use the microwave oven to heat and disinfect the soil. Can this method work? Let's look down together!
Can microwave oven disinfect soil? Can microwave oven disinfect soil? The answer is: Yes. But microwave oven can kill harmful bacteria as well as beneficial microorganisms and animals in soil. Therefore, the soil sterilized by microwave will lose its use value.
be careful:
If the flower soil is less, the microwave oven is the best method, fast and effective.
If the flower soil is more, using the steaming method is fast, the effect is good, more troublesome.
If the amount of flower soil is too large, it is time-consuming to use stacking method and drug disinfection. When using microwave oven to disinfect soil, it is necessary to have some precautions to avoid unnecessary danger caused by improper operation.
Some Huayou used high temperature (high fire) for 15 minutes. As a result, the soil caught fire. This is because there is less water in the soil and there are more organic matters in the soil. Therefore, it is necessary to pay attention to the proper measures when using the microwave oven to disinfect the soil. What's more, we need to tell Huayou that soil disinfection is not a necessary process, unless it is specially needed, such as special sowing, cutting, etc., which is normal Plants don't need to be disinfected in this way to grow normally.
Method 1: (the simplified method is very simple)
1. Spray water and pack plastic bags.
2. When the microwave oven is turned on, it is one gear higher than defrosting. The time is 15 minutes, people look at the stove.
3. When the bag expands, turn off the microwave.
4. Just be strong.
If you are afraid of trouble, you can stop here. If you want to further understand, please look down. The simplified method mentioned above can not use too many media for one heating and one-time heating and disinfection. The bag should be tiled with a microwave turntable, and the height should not be higher than 2 cm. The media in the center of the turntable is better to be pulled outside, which needs more time. The heat should not be too high. Or it's all coke out there. The heart is still warm. The small fire shield can slow down the heat transfer and make it more sufficient. This method mainly uses heat transfer between media and steam disinfection. It's not very thorough. Can handle the past. Of course, killing insects is basically complete. And the heating process of stirring and then continue heating is very thorough, that is, the following method.
What is media? The media mentioned in most cases are soil, mud, soil, planting soil, culture soil, medium. Medium is a kind of general term. We call this medium here what we plant on.
High temperature steam disinfection
Method 2: (simply speaking of the standard method)
1. Spray water and put it in a plastic bag. The volume of plastic bag should be 1 / 3 larger than medium volume.
2. Put the mud bag in the microwave. Turn on the medium fire. The time is 5-10 minutes (this time is only for turning on the furnace).
3. Don't go away, see that the bag is completely inflated, and then count 10 times, turn off the furnace and take out the bag with gloves.
4. Put on your gloves. Gently swing the bag 10 times. Then find a toothpick, poke a hole in the bag, press out the steam in the bag with gloves or towel, and pay attention to the steam when tying and pressing.
5. Turn the oven down and turn the bag back on. Wait 5 minutes to remove.
6. After cooling completely, the bag can be opened and the upper basin can be used.
Chemicals disinfect the soil
Method 3: (elaborate on the improvement method)
1. According to personal preferences or plant needs, sift and match the medium, sprinkle with water. If it is pure peat, add water and squeeze it with your hands. If it is a prepared medium, then add water and drain until it does not drip.
2. Add the medium of water into the plastic bag, squeeze out the excess air, and tie it up. The plastic bag should not be too big. If the mouth blows up, it can be put into the microwave oven. The small safety bag pulled back from the supermarket is very easy to use. It is recommended to wrap it in two layers. The opening of the inner layer is slightly loose. The outer layer is tied to the seal. So the plastic bag is broken. The possibility of the inner and outer bags breaking from the same position is still small. It's easier to handle. Put a piece of plastic film or bag on the microwave plate to make a bottom lining. It's better to have a round shape, and fold the corners for a square one. So as not to hinder the operation of the rotary table. If the heating medium is too little to less than 200 ml, it is better to put a small half bowl of water to avoid the microwave oven empty.
3. Put the plastic filled with medium into microwave oven. Turn on the medium range fire. If the microwave oven is a knob, it will start from the defrost gear to the 1 / 2 position, which can be used in this range. I opened it a little higher than unfreezing. If it is controlled by computer, it is set to 1 or 2 gear higher than unfreezing. The time is 5-10 minutes. (this time is only for opening)
4. Standing one meter away from the microwave oven and observing the inside, you can see that the plastic bag is completely inflated until you feel that the plastic bag is about to crack and burst. Turn off the microwave. If the bag is not bursting, it is completely broken. There's no danger. That's where the bag leaks. Because there is step 2. 1 step 2. After a minute, turn on the furnace and take out the whole bottom lining. Just put it in a new bag. If you have time, wait half an hour for the high temperature steam in the bag to condense. Turn on the furnace again for the next step (it is recommended to take more time, but the disinfection effect is better and safer. )。
Soil disinfection
5. Put on anti scald gloves. If not, use a towel to protect your hands. Take out the inflated bag. It's about ten times. The aim is to slosh the parts that are not warm enough inside to the outside. The bag swells because of heat. It's better to shake off the center part. But at the same time, because of the high temperature and the steam, the bag is easier to crack. So swing gently. The necessary protective equipment is even more indispensable. (remember! Prevention first, safety first! ）Of course, it is also a good way to untie the bag and stir with a stick. Also pay attention to avoid the risk of steam scald.
6. After swinging well, if it is not carried out 4. If it is cooled naturally, if it is not stirred with a stick, it is necessary to make a small hole with a toothpick near the mouth of the bag to discharge steam.
7. Put it in the microwave oven and continue to heat on medium heat. That is, repeat steps 3 to 4 and turn off the microwave oven when the bag expands. Wait 5-10 minutes to remove. This time the heating time will be shorter than the last time. Because it's already very hot inside. Waiting for 5-10 minutes on the one hand is to make full use of the inertia of molecular friction to improve microwave efficiency. On the one hand, it is also used to condense steam for easy removal. And reduce high temperature accidents.
8. After several times of heating and disinfection. When the medium is completely cooled, it can be used on the basin. Touch the temperature in the center of the medium with your hand before putting on the basin, so as to avoid plant accidents caused by residual temperature.
9. Wipe the inside of the microwave oven with a paper towel dipped in water. The turntable can be taken out for cleaning, but the temperature should be tested with the back of hand before taking out the disc. In order to avoid mistakes caused by high temperature. When taking it out, both hands should hold the disc at the same time and operate with care. (I've broken one myself. I've been very careful with one hand operation. )
sow
Editor's note: in the process of disinfection, we must protect ourselves from being scalded by high temperature medium and steam. It is necessary to deal with the aftermath. Especially when family members or spouses are not very supportive. If so, disinfect them when they are not at home. Adding water not only prevents peat from becoming coke, but also produces steam disinfection.
All the starting time of microwave oven mentioned in this paper is only for starting up microwave oven. Instead of letting it run at this time until the end of the set time and automatically shut down. All shutdown is manual shutdown. When you see that the bag is about to crack, you can turn it off manually. If there is too much medium, the firepower will be too low. When the time comes, the microwave oven is automatically turned off, and the bag is not inflated, then start it again, and you can slightly increase the firepower level.