In recent years, greenhouse vegetable development has been rapid, which has played an important role in the development of efficient agriculture. Due to the high temperature and humidity in the greenhouse, the conditions for ventilation and light transmission are poor, such as fertilization caused by improper application of fertilizer.

First, the causes of fertilizer damage

1. The amount of direct injury: greenhouse vegetables are often high in fertilizer, especially fertilizer or quick-acting organic fertilizer (human waste, cake fertilizer, etc.) once the amount is too high, can easily cause fertilizer damage, manifested as vegetable roots difficult to absorb water, but not stiff seedlings The leaves are deformed and the vegetables are gradually wilting and even dead.

2. Inappropriate fertilization methods cause injury: when the vegetable dressing points are applied, the roots are applied close to the root system, or when the organic manure is used as the base fertilizer, the fertilizer is larger, causing reverse osmosis of the crop. The edges of the crop leaves are burnt like boiling water, and are scorched after a few days.

3. Harmful gas damage: When ammonium nitrogen fertilizer or fresh organic fertilizer is applied in a greenhouse, the high temperature in the greenhouse will decompose a large amount of ammonia in a short period of time, especially if the fertilizer is applied to the soil surface and it cannot be covered. Especially serious. When sensitive vegetables such as cucumber and tomato are damaged, they mainly show watery spots on the leaves. The cells lose water and form brown spots. In severe cases, there are massive brown spots between the veins.

Due to the large amount of nitrogen fertilizer applied, ammonium is converted into nitrous acid under the action of nitrous acid bacteria. When the accumulated nitrous acid is vaporized, toxic NO2 is produced to harm the crop. Cucumbers, solanaceous vegetables, and cruciferous vegetables are sensitive to nitrogen dioxide gas and initially appear as irregular water-stained lesions on the leaves and then spread to the entire leaf, producing irregular white to yellow spots.

4. Salt accumulation accumulates poison: greenhouse vegetable has a large amount of fertilizer, and soluble salt in soil rises with groundwater to the soil surface, resulting in accumulation of salt in the topsoil. Due to the high salt content in the surface layer, the vegetables have physiological obstacles, such as short plants, dark green leaves, poor growth, and rimming of the leaf margin.

5. Reduced availability of nutrients: When a certain nutrient is applied excessively, it will produce antagonistic effects, leading to a decrease in the effectiveness of other elements, and the crop behaves as a certain element deficiency. For example, too much phosphorus will reduce the effectiveness of zinc, and too much potassium will reduce the effectiveness of calcium, magnesium, and boron.

Second, prevention and control measures

1. Add organic fertilizer. The application of organic fertilizer can improve the soil structure, improve the buffering properties of the soil, reduce the amount of chemical fertilizers, and reduce salt damage. Fresh organic fertilizer can be applied only after it has been thoroughly cooked.

2. Promote balanced fertilization. Excess fertilizer is the root cause of fertilizer damage. It is necessary to start with controlling the amount of fertilizer, and appropriately reduce the amount of nitrogen and phosphate fertilizers, supplement potassium fertilizer, and apply trace elements such as boron, zinc, molybdenum, etc., instead of unilaterally pursuing high yields and blind fertilization.

3. Choose the right variety of fertilizer. It is best to use less fertilizers. Use as little or no chlorine-containing fertilizer as possible, and promote the application of low-nitrogen and high-concentration compound fertilizers.

4. Master the principle of a few times. Advocating the deep application of chemical fertilizers in the entire layer can protect fertilizers, reduce volatilization losses, and reduce the effect of direct injury. Do not spread chemical fertilizers to the soil surface. It is advisable to use 70-80% of the total amount of fertilizer as the base fertilizer for deep layer application. The amount of topdressing chemical fertilizer should not be too much, and the principle of grasping a small number of times should be taken.

5. Timely ventilation. Use the high temperature before and after noon time should be appropriate to open the vents, ventilation, especially greenhouse vegetables after fertilization, should pay attention to ventilation, reduce the shed due to toxic gases caused by fertilizer, reduce injury.

6. In greenhouse, salt is removed during the leisure period. Measures can be taken during the leisure period of the greenhouse to reduce salt accumulation. For example, in the summer, the salt in the soil is poured into the deep soil to reduce the salt damage.

Description

Butafosfan is an organic phosphorus compound used as an injectable source of phosphorus in animals that takes part in energy metabolism, replenishes serum phosphorus levels, supports hepatic function and stimulates fatigued smooth and cardiac muscle. Its physiological rather than its pharmacological action accounts for its very low level of toxicity. Cyanocobalamin (Vitamin B12) assist in various metabolic processes, most notably the formation of red blood cells, and stimulates protein, carbohydrate and fat metabolism.


Butafosfan+B12 Injection indicated for debilitation by acute or chronic metabolism disorders that result from poor nutrition, inadequate management or disease (e.g. developmental and nutritional disorders in young animals due to rearing disease, and (secondary) ketosis in cows). It can be used for metaphylaxis of infertility, puerperal diseases and in support of sterility treatment. It acts as a roborant in cases of stress, overexertion, exhaustion and reduced resistance, and as a tonic in cases of weakness, secondary anaemia and chilling. Butasal-100 additionally supports muscular physiology, the treatment of infertility, and tetany and paresis as an adjunct to calcium and magnesium therapy.


Butafosfan+B12 Injection

Vitamin B Injection,Vitamin Injection,Butafosfan B12 Injection

Hebei Kexing Pharmaceutical Co., Ltd. , https://www.kexingpharma.com