Q: In the last issue of this newspaper, one of the countermeasures for the production of pollution-free vegetables was to reduce the nitrate content in commercial vegetables. What other fertilization countermeasures are there?
A: The second fertilization strategy for producing pollution-free vegetables is to prevent heavy metal pollution of vegetables. The content of heavy metal elements in vegetable products exceeds the standard and is harmful to human health. Therefore, heavy metals such as mercury, lead, arsenic, chromium, copper, cadmium, zinc, etc., their accumulation in vegetables is an important part of evaluating the safety quality of vegetables. In order to ensure that heavy metals in vegetable products do not exceed the standard, they must be picked up from the source.
Q: Why should we prevent heavy metal pollution from getting caught from the source?
A: This is because once the soil is contaminated by heavy metals, heavy metal elements enter the food chain, which is very dangerous. The vegetables produced by this polluted soil contain a certain amount of heavy metal elements. People eat contaminated vegetables and return some heavy metal elements to the vegetable fields through the feces. This cycle of repeated cycles, the food chain has been playing. Therefore, it is very important to prevent heavy metal pollution from getting caught from the source!
Q: What specific measures are there to prevent the pollution of heavy metals on commercial vegetables?
A: There are two specific effective measures:
It is forbidden to use untreated industrial sewage to irrigate vegetable fields. According to the study, the soil organic matter, total nitrogen, total phosphorus, and available nitrogen and phosphorus nutrients in the vegetable garden of many years have a significant increase compared with the Qingshui irrigation area. However, it must be pointed out that the content of heavy metals such as lead, cadmium and mercury in the sewage irrigation area is also significantly higher than that in the Qingshui irrigation area. Once heavy metal elements enter the food chain, the consequences are extremely serious. Therefore, in order to prevent heavy metal pollution to vegetables, it is necessary to prohibit the use of untreated industrial sewage to irrigate vegetable fields.
Sludge should not be applied directly. Sludge is solid waste after sewage treatment. Its complex composition, containing a large amount of organic matter and various nutrients, but also contains a certain amount of pathogens, parasite eggs, heavy metals and some difficult to decompose toxic organic compounds. Therefore, the sludge should be subjected to necessary treatment in advance, and the untreated sludge should not be directly applied for this reason.
Q: The third fertilization strategy is to prevent bio-contamination of commercial vegetables. What specific measures are there?
A: The following measures can usually be taken to prevent bio-contamination of commercial vegetables:
Human excrement must be treated harmlessly.
The livestock manure must be composted, and the purpose is to use the high temperature (70 ° C) generated by the process of microbial decomposition of organic matter to eliminate pathogens, eggs and viruses, so as not to cause biological pollution to vegetables.
Expert tips
To produce pollution-free vegetables, it is necessary to master three fertilizer-reducing measures to reduce nitrate content, prevent heavy metal pollution and prevent biological pollution. This is not only the need for human health, but also the need to earn foreign exchange through vegetable exports.
To prevent heavy metal from contaminating vegetables, it is forbidden to use untreated industrial sewage to irrigate vegetable fields, and it is not appropriate to use untreated sludge directly.
In order to prevent bio-contamination of commercial vegetables, it must be done: human waste must be treated harmlessly; livestock manure must be composted. Q: In the last issue of this newspaper, one of the countermeasures for the production of pollution-free vegetables was to reduce the nitrate content in commercial vegetables. What other fertilization countermeasures are there?
A: The second fertilization strategy for producing pollution-free vegetables is to prevent heavy metal pollution of vegetables. The content of heavy metal elements in vegetable products exceeds the standard and is harmful to human health. Therefore, heavy metals such as mercury, lead, arsenic, chromium, copper, cadmium, zinc, etc., their accumulation in vegetables is an important part of evaluating the safety quality of vegetables. In order to ensure that heavy metals in vegetable products do not exceed the standard, they must be picked up from the source.
Q: Why should we prevent heavy metal pollution from getting caught from the source?
A: This is because once the soil is contaminated by heavy metals, heavy metal elements enter the food chain, which is very dangerous. The vegetables produced by this polluted soil contain a certain amount of heavy metal elements. People eat contaminated vegetables and return some heavy metal elements to the vegetable fields through the feces. This cycle of repeated cycles, the food chain has been playing. Therefore, it is very important to prevent heavy metal pollution from getting caught from the source!
Q: What specific measures are there to prevent the pollution of heavy metals on commercial vegetables?
A: There are two specific effective measures:
It is forbidden to use untreated industrial sewage to irrigate vegetable fields. According to the study, the soil organic matter, total nitrogen, total phosphorus, and available nitrogen and phosphorus nutrients in the vegetable garden of many years have a significant increase compared with the Qingshui irrigation area. However, it must be pointed out that the content of heavy metals such as lead, cadmium and mercury in the sewage irrigation area is also significantly higher than that in the Qingshui irrigation area. Once heavy metal elements enter the food chain, the consequences are extremely serious. Therefore, in order to prevent heavy metal pollution to vegetables, it is necessary to prohibit the use of untreated industrial sewage to irrigate vegetable fields.
Sludge should not be applied directly. Sludge is solid waste after sewage treatment. Its complex composition, containing a large amount of organic matter and various nutrients, but also contains a certain amount of pathogens, parasite eggs, heavy metals and some difficult to decompose toxic organic compounds. Therefore, the sludge should be subjected to necessary treatment in advance, and the untreated sludge should not be directly applied for this reason.
Q: The third fertilization strategy is to prevent bio-contamination of commercial vegetables. What specific measures are there?
A: The following measures can usually be taken to prevent bio-contamination of commercial vegetables:
Human excrement must be treated harmlessly.
The livestock manure must be composted, and the purpose is to use the high temperature (70 ° C) generated by the process of microbial decomposition of organic matter to eliminate pathogens, eggs and viruses, so as not to cause biological pollution to vegetables.
Expert tips
To produce pollution-free vegetables, it is necessary to master three fertilizer-reducing measures to reduce nitrate content, prevent heavy metal pollution and prevent biological pollution. This is not only the need for human health, but also the need to earn foreign exchange through vegetable exports.
To prevent heavy metal from contaminating vegetables, it is forbidden to use untreated industrial sewage to irrigate vegetable fields, and it is not appropriate to use untreated sludge directly.
In order to prevent bio-contamination of commercial vegetables, it must be done: human waste must be treated harmlessly; livestock manure must be composted. (Chen Lunhou)
From: Economic Daily
More info about PCR Tubes:
What Are PCR Tubes?
PCR tubes are small tubes made of high-quality virgin polypropylene with a conical bottom. They have uniform thin walls to facilitate efficient heat transfer to the sample. These tubes are autoclavable and work well with most thermal cyclers.
What Are the Applications of PCR Tubes?
The most common application of PCR tubes includes various molecular biology biochemistry experiments requiring real-time PCR (Polymerase Chain Reaction). As these tubes have ultra-thin walls, they are perfect for accurate and steady thermal transfer in an array of thermocyclers. Our thin-wall PCR tubes meet the protocols required for PCR, qPCR, reverse transcriptions, and a variety of other applications.
A: The second fertilization strategy for producing pollution-free vegetables is to prevent heavy metal pollution of vegetables. The content of heavy metal elements in vegetable products exceeds the standard and is harmful to human health. Therefore, heavy metals such as mercury, lead, arsenic, chromium, copper, cadmium, zinc, etc., their accumulation in vegetables is an important part of evaluating the safety quality of vegetables. In order to ensure that heavy metals in vegetable products do not exceed the standard, they must be picked up from the source.
Q: Why should we prevent heavy metal pollution from getting caught from the source?
A: This is because once the soil is contaminated by heavy metals, heavy metal elements enter the food chain, which is very dangerous. The vegetables produced by this polluted soil contain a certain amount of heavy metal elements. People eat contaminated vegetables and return some heavy metal elements to the vegetable fields through the feces. This cycle of repeated cycles, the food chain has been playing. Therefore, it is very important to prevent heavy metal pollution from getting caught from the source!
Q: What specific measures are there to prevent the pollution of heavy metals on commercial vegetables?
A: There are two specific effective measures:
It is forbidden to use untreated industrial sewage to irrigate vegetable fields. According to the study, the soil organic matter, total nitrogen, total phosphorus, and available nitrogen and phosphorus nutrients in the vegetable garden of many years have a significant increase compared with the Qingshui irrigation area. However, it must be pointed out that the content of heavy metals such as lead, cadmium and mercury in the sewage irrigation area is also significantly higher than that in the Qingshui irrigation area. Once heavy metal elements enter the food chain, the consequences are extremely serious. Therefore, in order to prevent heavy metal pollution to vegetables, it is necessary to prohibit the use of untreated industrial sewage to irrigate vegetable fields.
Sludge should not be applied directly. Sludge is solid waste after sewage treatment. Its complex composition, containing a large amount of organic matter and various nutrients, but also contains a certain amount of pathogens, parasite eggs, heavy metals and some difficult to decompose toxic organic compounds. Therefore, the sludge should be subjected to necessary treatment in advance, and the untreated sludge should not be directly applied for this reason.
Q: The third fertilization strategy is to prevent bio-contamination of commercial vegetables. What specific measures are there?
A: The following measures can usually be taken to prevent bio-contamination of commercial vegetables:
Human excrement must be treated harmlessly.
The livestock manure must be composted, and the purpose is to use the high temperature (70 ° C) generated by the process of microbial decomposition of organic matter to eliminate pathogens, eggs and viruses, so as not to cause biological pollution to vegetables.
Expert tips
To produce pollution-free vegetables, it is necessary to master three fertilizer-reducing measures to reduce nitrate content, prevent heavy metal pollution and prevent biological pollution. This is not only the need for human health, but also the need to earn foreign exchange through vegetable exports.
To prevent heavy metal from contaminating vegetables, it is forbidden to use untreated industrial sewage to irrigate vegetable fields, and it is not appropriate to use untreated sludge directly.
In order to prevent bio-contamination of commercial vegetables, it must be done: human waste must be treated harmlessly; livestock manure must be composted. Q: In the last issue of this newspaper, one of the countermeasures for the production of pollution-free vegetables was to reduce the nitrate content in commercial vegetables. What other fertilization countermeasures are there?
A: The second fertilization strategy for producing pollution-free vegetables is to prevent heavy metal pollution of vegetables. The content of heavy metal elements in vegetable products exceeds the standard and is harmful to human health. Therefore, heavy metals such as mercury, lead, arsenic, chromium, copper, cadmium, zinc, etc., their accumulation in vegetables is an important part of evaluating the safety quality of vegetables. In order to ensure that heavy metals in vegetable products do not exceed the standard, they must be picked up from the source.
Q: Why should we prevent heavy metal pollution from getting caught from the source?
A: This is because once the soil is contaminated by heavy metals, heavy metal elements enter the food chain, which is very dangerous. The vegetables produced by this polluted soil contain a certain amount of heavy metal elements. People eat contaminated vegetables and return some heavy metal elements to the vegetable fields through the feces. This cycle of repeated cycles, the food chain has been playing. Therefore, it is very important to prevent heavy metal pollution from getting caught from the source!
Q: What specific measures are there to prevent the pollution of heavy metals on commercial vegetables?
A: There are two specific effective measures:
It is forbidden to use untreated industrial sewage to irrigate vegetable fields. According to the study, the soil organic matter, total nitrogen, total phosphorus, and available nitrogen and phosphorus nutrients in the vegetable garden of many years have a significant increase compared with the Qingshui irrigation area. However, it must be pointed out that the content of heavy metals such as lead, cadmium and mercury in the sewage irrigation area is also significantly higher than that in the Qingshui irrigation area. Once heavy metal elements enter the food chain, the consequences are extremely serious. Therefore, in order to prevent heavy metal pollution to vegetables, it is necessary to prohibit the use of untreated industrial sewage to irrigate vegetable fields.
Sludge should not be applied directly. Sludge is solid waste after sewage treatment. Its complex composition, containing a large amount of organic matter and various nutrients, but also contains a certain amount of pathogens, parasite eggs, heavy metals and some difficult to decompose toxic organic compounds. Therefore, the sludge should be subjected to necessary treatment in advance, and the untreated sludge should not be directly applied for this reason.
Q: The third fertilization strategy is to prevent bio-contamination of commercial vegetables. What specific measures are there?
A: The following measures can usually be taken to prevent bio-contamination of commercial vegetables:
Human excrement must be treated harmlessly.
The livestock manure must be composted, and the purpose is to use the high temperature (70 ° C) generated by the process of microbial decomposition of organic matter to eliminate pathogens, eggs and viruses, so as not to cause biological pollution to vegetables.
Expert tips
To produce pollution-free vegetables, it is necessary to master three fertilizer-reducing measures to reduce nitrate content, prevent heavy metal pollution and prevent biological pollution. This is not only the need for human health, but also the need to earn foreign exchange through vegetable exports.
To prevent heavy metal from contaminating vegetables, it is forbidden to use untreated industrial sewage to irrigate vegetable fields, and it is not appropriate to use untreated sludge directly.
In order to prevent bio-contamination of commercial vegetables, it must be done: human waste must be treated harmlessly; livestock manure must be composted. (Chen Lunhou)
From: Economic Daily
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More info about PCR Tubes:
What Are PCR Tubes?
PCR tubes are small tubes made of high-quality virgin polypropylene with a conical bottom. They have uniform thin walls to facilitate efficient heat transfer to the sample. These tubes are autoclavable and work well with most thermal cyclers.
What Are the Applications of PCR Tubes?
The most common application of PCR tubes includes various molecular biology biochemistry experiments requiring real-time PCR (Polymerase Chain Reaction). As these tubes have ultra-thin walls, they are perfect for accurate and steady thermal transfer in an array of thermocyclers. Our thin-wall PCR tubes meet the protocols required for PCR, qPCR, reverse transcriptions, and a variety of other applications.
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