Carbon Black is formed by the accumulation of spherical or chain particles with an average diameter of 5~30nm, and the internal microcrystalline structure with a diameter of 3~500nm, which can react with various free radicals.The proportion of carbon black is 1.8~1.9, the proportion of granular carbon black is 0.35~0.4, and the proportion of powdered carbon black is 0.04~0.08.
Carbon black can increase the tensile strength, hardness, tear resistance, wear resistance and other properties of rubber products, it is mainly used as a rubber reinforcing agent, especially for tires.Carbon black's color is extremely black, covering strength is very strong, also is the ideal black pigment.Used to manufacture tires, rubber tubes, conveyor belts and other rubber products as well as ink, dye, paint and other products.
Carbon Black is mainly applied to various rubber products such as tires,rubber overshoes,cable,seal ring,tape etc.Moreover they can be applied to such relevant industries as plastic manufacture.
Carbon Black Carbon Black,Carbon Black Pigment,Carbon Black Powder,Pigment Carbon Black Yucheng Jinhe Industrial Co.,Ltd , https://www.jinhetec.com
First, the cause of calcium deficiency
1. Physiological calcium deficiency. Physiological calcium deficiency means that the soil itself contains enough calcium, which affects transpiration or root growth, which causes calcium to be absorbed by crops. These factors include temperature, soil pH, and soil moisture. When the pH value is less than 6, the utilization rate of calcium is drastically lowered, so the acidic soil generally has a severe calcium deficiency.
2. The soil contains low calcium or high salt content, which affects the absorption of calcium by roots.
3. Excessive application of nitrogen fertilizer. Because the excessive use of nitrogen fertilizer will increase the salt concentration of the deep fluid in the soil and reduce the absorption of calcium.
Second, calcium deficiency performance
1. The transportation of calcium nutrients by crops is mainly carried out in the xylem from the roots to various parts of the plant through the form of transpiration and root pressure. When the crop is deficient in calcium, there will be problems such as soft head and top bud necrosis, young leaves curl deformity, leaf edge scorch, and fruit cracking.
2. The calcium-deficient parts are top buds, lateral buds, new leaves and fruits. On the one hand, because the transpiration of these parts is very weak, the transpiration of crop organs from old to small is the old leaf-new leaf-fruit-top bud. Once calcium deficiency occurs, the calcium deficiency problem first occurs in addition to the old leaves. On the other hand, the transfer rate of calcium in plants is very slow. Once calcium deficiency occurs, although a large amount of calcium is stored in the old leaves, it cannot be transferred in time. Therefore, the calcium deficiency is first expressed in the young leaves and the old leaves are not too obvious. .
Third, the solution
1. Improve soil structure. By regulating the ACID-base balance of the soil, the soil aggregate structure is improved, the soil is adjusted to a suitable range, and the root growth is promoted to promote calcium absorption.
2, apply calcium supplementation. Commonly used calcium fertilizers on the market include lime and calcium nitrate. However, caution should be exercised. For example, long-term application of lime may cause the pH of the soil to rise and should not be used for years.
3, leaf surface calcium. The combination of roots and leaves, the roots are mainly supplemented, and the foliage is supplemented. At the same time as the base fertilizer is applied, the chelated calcium fertilizer is sprayed on the foliage before the critical period and maximum period of the demand for calcium in the crop.
When the first month is spring, the crop growth begins to recover. The seedlings grow, the old trees recover, and they don't leave the nutrient supply. At this time, farmers are accustomed to supplement nutrients with compound fertilizer, ignoring the supplement of trace elements. However, the recovery of crops, the development of roots requires NPK and calcium is also indispensable. Therefore, spring supplementation of calcium in crops is very important.
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