What is chlorine compound fertilizer and how to apply it?

Preface: What is chlorine compound fertilizer?

Chlorine-containing compound (mixed) fertilizer refers to a compound (mixed) fertilizer in which the potassium source is derived from potassium chloride and part or all of the nitrogen source is ammonium chloride.

Briedf history of chlorine compound fertilizer and why we are writing this article:

Our country has a short history of using chemical fertilizers, and people know little about chlorine-based fertilizers.

• Coupled with the traditional understanding of “avoiding chlorine” and the negative effects of improper fertilizer use, many farmers and users are concerned about the use of chlorine-containing fertilizers.
• In addition, some manufacturers also have extremely one-sided and superficial propaganda about chlorine-containing fertilizers, which has affected the correct application of chlorine-containing fertilizers to a certain extent.

In order to rationally utilize fertilizer resources and maximize the yield-increasing benefits of fertilizers, let’s briefly talk about our understanding of chlorine-containing fertilizers and application suggestions.

First thing first: What are the Nutritional effects of chlorine?

Chlorine is one of the seven trace elements necessary for plants. It widely exists in nature and is the trace element with the highest content in plants. So far, most plants have no obvious symptoms of chlorine deficiency. However, chlorine has good growth effects on many plants, mainly as follows:

1. Participate in photosynthesis.
2. Regulate the osmotic pressure of plant cells and the opening and closing of stomata, which is beneficial to the absorption of nutrients and improves drought resistance.
3. Enhance plant resistance to diseases, such as total rot of winter wheat, stripe rust, and corn stem blight.
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4. Chloride ions have an inhibitory effect on nitrifying bacteria in the soil, can delay the conversion of ammonium nitrogen into nitrate nitrogen, can effectively reduce nitrate nitrogen loss and denitrification loss, and have long fertilizer effect and great staying power.
   In addition, chlorine, as a stable ion in plant cells, has a certain impact on the balance of various ions in the cells and the absorption of nitrogen, phosphorus, potassium, calcium, magnesium, etc. It is also said to accelerate the development of plant stems and leaves.

How to apply chlorine compound fertilizer and 5 aspects you need to pay attention to？

• 1. Chlorine compound fertilizer has a long fertilizer effect and is suitable as a base fertilizer. The processed and granulated compound fertilizer decomposes more slowly than powdered fertilizer, is less likely to be lost and volatilized, has a longer fertilizer effect, and is easier to use as base fertilizer. The general dosage per mu is 30 to 40 kilograms. Chlorine-containing compound fertilizers should not be used as fertilizer in the seedling stage or in the mid-to-late growth period to avoid excessive growth of crops. Pay attention to use it in conjunction with elemental nitrogen fertilizer. The seedling stage of crops requires less nitrogen fertilizer, so it is necessary to fertilize
• 2. For crops that use chlorine-containing compound fertilizers as base fertilizers, top-dressing fertilizers should be supplemented with available nitrogen fertilizers in a timely manner according to the fertilizer requirements of different crops to meet the nutritional needs of the crops. Pay attention to choosing the appropriate concentration. Most chlorine-containing compound fertilizers are formulated according to the average nutrient status of the soil type in a certain area and the proportion of bulk crops. There are high, medium and low concentration series of chlorine-containing compound fertilizers on the market. Generally, the low concentration of total nutrients is between 25% and 30%, the medium concentration is between 30% and 40%, and the high concentration is above 40%. Economical and efficient compound fertilizers should be selected and used according to different regions, soils and crops.
• 3. Generally, high-concentration chlorine-containing compound fertilizers are used on economic crops, which can produce high-quality crops, less fertilizer residues, and high utilization rates. Be careful to avoid direct contact between seeds and fertilizers or mixed use of seeds and fertilizers. Chlorine-containing compound fertilizers have high nutrient content. If they come into direct contact with seeds or seedling roots, they will affect seedling emergence or even burn seedlings and cause root rot.
• 4. When sowing, the seeds should be about 5 to 10 centimeters away from the holes or strips of compound fertilizer. Do not apply fertilizer directly in the same hole as the seeds, as this may cause fertilizer damage. Pay attention to the usage range of nutrients. Different brands and different concentrations of compound fertilizers use different raw materials, and the production should be selected according to the soil type and crop type.
• 5. Chlorine-containing compound fertilizers containing nitrate roots should not be used on leafy vegetables and paddy fields; compound fertilizers containing nitrogen ions should not be used on saline-alkali land; compound fertilizers containing potassium chloride or ammonia ions should not be used on nitrogen-prone crops or saline-alkali land. ; Compound fertilizers containing potassium sulfate should not be used in paddy fields and acidic soil. Otherwise, the fertilizer efficiency will be reduced and even the crops will be poisoned.

What are the disadvantages of chlorine compound fertilizer? To be honest.

1. Since chloride ion is the most active anion in the soil, it combines with cations to form chloride. Chloride is easily dissolved in the soil and can rise to the surface with the soil water. The water evaporates and the salt remains on the surface. The cations in the lower layer are brought to the upper layer, aggravating the salt damage of the soil.
2. Chloride ions can also combine with other cations to form harmful chlorides, such as calcium chloride in calcareous soil, which is detrimental to crop growth and development.
3. Chloride ions and their chlorides can also easily seep into the lower layers of the soil with rain and irrigation water or flow out of cultivated land with water, without causing any harm.
4. Some plants are very sensitive to chloride ions. When the absorption reaches a certain level, the yield and quality will be significantly affected. These plants are usually called chlorine-resistant plants.

Which plants are suitable for chlorine-containing compound fertilizer?

• Crops with strong chlorine resistance: rice, sorghum, millet, cotton, kenaf, spinach, sugar beet, tomato, rapeseed, radish, cucumber, eggplant, etc. Crops with moderate chlorine resistance: wheat, corn, peanuts, soybeans, peas, Onions, cauliflower, cabbage, celery, strawberries, sugar cane, citrus, flax, grape seedlings, hawthorn seedlings, etc.
• Chlorine compound fertilizer especially suitable for soils with good permeability, watering conditions and heavy rainfall, such as the vast areas in the south and other saline-alkali soil areas.
• Chloride compound fertilizer should not be applied to crops with low air tolerance, or it should be applied with caution if conditions permit. Mainly tobacco, sweet potato, potato, cabbage, pepper, lettuce, amaranth, apple, grape, tea, watermelon, etc. These crops are usually called chlorine-resistant crops.
• Chloride fertilizer should not be applied to salty soil with high chlorine content, saline soil, clay soil with poor water penetration, waterlogged depressions, calcareous soil with strong water holding capacity and soil under greenhouse cultivation conditions for many years.
• However, some plants, such as cotton, hemp and other fiber crops, respond well to chloride ions, which is beneficial to the increase of fiber length and tensile strength. The application effect of chlorine-containing fertilizers in paddy fields is often better than that of sulfur-containing fertilizers.

Conclusion:

In this article we introduce what chlorine-based compound fertilizer is, the advantages and disadvantages of chlorine-based compound fertilizer, and how chlorine-based compound fertilizer helps plant growth. More emphasis is placed on helping readers understand why chlorine-based compound fertilizers have been misunderstood for a long time. So I hope that after reading this article, everyone can look at chlorine-based compound fertilizer more rationally. It is not toxic, but it helps plants in many ways better than other compound fertilizers.