Which fertilizers should not be applied to vegetables?

At present, there are many kinds of chemical fertilizers, and there are more than 10 commonly used ones. However, although there are two types of chemical fertilizers, although the vegetables can increase the yield, they can cause pollution of vegetables, causing poisoning and even life-threatening.
Ammonium nitrate and other nitrate nitrogen fertilizers are not suitable for use in vegetables, especially cabbage, green vegetables, spinach and other leafy vegetables. Because the nitrate nitrogen fertilizer is applied to the vegetable field, the nitrate content of the vegetable is doubled, and the nitrate is easily reduced to nitrite in the human body. Nitrite is a kind of drug, which is extremely harmful to the human body and is a carcinogen.
Fertilizers containing chlorine, such as ammonium chloride and potassium chloride, should not be applied to vegetables such as tomatoes and potatoes. After the chlorinated fertilizer is decomposed in the soil, ammonia or potassium ions are adsorbed by the soil and absorbed by the crops. To a certain extent, it will poison the plant roots, which can reduce the starch and sugar content of the product, affecting the yield and quality, and endangering the health of the consumer.

COD Sensor

The ultraviolet absorption method is a commonly used method for the determination of chemical oxygen demand (COD). The COD sensor principle is to irradiate the sample with ultraviolet light to make the organic matter absorb under the action of ultraviolet light, measure the intensity of the absorbed light, and calculate the COD value in the sample. Its characteristics are as follows:
1. High sensitivity: The ultraviolet absorption method COD sensor has high sensitivity to organic matter, and can measure COD values at low concentrations.
2. Quick and easy: The process of measuring COD by ultraviolet absorption method is simple and fast, does not need to use complicated instruments and equipment, and is easy to operate.
3. High reliability: The results of COD determination by ultraviolet absorption method are stable and reliable, with high accuracy and repeatability.
4. Wide applicability: The UV absorption method TOC COD sensor can determine the COD value in various types of water samples and wastewater samples, and has wide applicability.

5. The types of substances that can be measured are limited: the online COD sensor can only measure the COD value of organic substances, and the measurement effect on inorganic substances is poor.

Cod Sensor,Cod Probe Sensor,Cod Sensor Probe,Cod Probe Wastewater

Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com