There is a countermeasure against the high temperature of vegetable production
The effect of high temperature on the growth and development of vegetables The effects of high temperature on the growth and development of vegetables are many, usually manifested as the slow growth of plants; poor flower bud differentiation, pollination and fertilization are affected, fruit drop and fruit malformation increase; fruits and vegetables prone to sunburn In the disease, the diseased department was sunburned into pale white or light white leathery texture, and tissue necrosis became hard. In later stages, it was often rotted by saprophytic infection. Different crops have different tolerances for high temperatures. When tomato meets the high temperature of 30°C, it will reduce the photosynthetic intensity, it will bloom at 35°C and the result will be inhibited. When it is above 40°C, it will cause a large number of flowers and fruit to fall off, and the longer the duration, the more serious the fruit and fruit fall off. When it is mature, high temperatures above 30°C are encountered, lycopene formation is slowed down, lycopene exceeding 35°C is difficult to form, and green, yellow, and red variegated fruit appear on the surface. When the potato was exposed to high temperatures above 26.7-29.4°C, tubers stopped expanding.
Defensive measures: selection of heat-resistant varieties.
Improve the cultivation and management methods: rational close planting, so that the stems and leaves mutual shade. Intercropping with high-stalk crops, using high-stalk crops to shade vegetables. When the tomatoes are pruned over the summer, leave 2-3 leaves on the top layer to shade the sunscreen. After cabbage, broccoli, etc. are picked up, the peripheral leaves of the cabbage and broccoli are removed and covered on the leaf ball to avoid direct sunlight. After the cucurbit crops are covered, the upper side of the grass can be covered and the bottom pad can be used to prevent sunburn and rotten melon.
Cooling with water: In the summer and autumn high temperature season, timely irrigation can improve the microclimate conditions in the field and reduce the temperature by 1-3°C, thereby reducing the direct damage to flower organs and photosynthetic organs caused by high temperature. After the “hot shower†at noon, timely cooling with string water in the wells can improve soil air conditions in the vegetable field, enhance root activity, and prevent vegetable seedlings.
Fertilizers outside the roots: In the hot season, using potassium dihydrogen phosphate solution, superphosphate and grass ash leaching solution, Tianda 2116 solution for a number of consecutive foliar spray, both conducive to cooling and humidification, but also can supplement the vegetable growth and development necessary Moisture and nutrition, but spraying must be properly reduced spray concentration, increase water consumption. In addition, tomato spray 2000-3000ppm than the long (B9) solution, 0.1% zinc sulfate or copper sulfate solution, can increase the heat resistance of the plant, enhance anti-cracking, anti-sunburn ability, with 2,4-D dipping or coating Flowers can prevent heat falling and promote ovary enlargement.
Artificial shading: Set up a simple shady shed above the vegetable plots, covered with branches or crop stalks, covering the sparse shade of flowers, the temperature can drop 3-4 °C. Vegetables grown in plastic greenhouses cover shading nets in summer and autumn to reduce the temperature to 4-6°C and prevent heavy rain, hail and locust from directly harming vegetables.
Calcium Chloride Description :
Calcium chloride is an inorganic salt, which exists as solid or liquid. Solid calcium chloride is a white, crystal substance in the form of flake, granule, pellet or powder. With different crystallized water contents, it can be dihydrate or anhydrous. Liquid calcium chloride is a colorless, clear solution. As calcium chloride has such properties as quick dissolving, exothermic ability, attracting moisture from the air and surroundings, dissolving at very low temperature
Calcium Chloride Application :
1. They are widely used in highway, expressway, parking lot and port to melting snow and ice.
2. Used as dryer, as anti-fog, and anti-dust agent also fireproof agent
3. Protective agent and refining agent for petroleum/oil field.
4. Pigment assistance agent of textile. It is a kind of raw material.
5. It acts as flocculation in water treatment.
6. Be used in waste paper processing as removing printing ink agent.
7. As anti-freezing agent.
8. As dehydration agent.
9. Food additive: as cryogen are used in ice cream, as stable agent/coagulant used in bean products, drink and beer.
94% calcium chloride pellet
Calcium Chloride Specification
|
Item |
Standard |
|
|
74% Flakes/Granular |
77% Flakes/Granular |
|
|
Calcium chloride as CaCl2 |
≥74% |
≥77% |
|
Total alkali chloride as NaCl |
≤7.0% |
≤5.0% |
|
Total magnesium as Mgci2 |
≤0.5% |
≤0.5% |
|
Alkalinity as Ca(OH)2 |
≤0.4% |
≤0.4% |
|
Insoluble in water |
≤0.3% |
≤0.2% |
|
Item |
Standard |
|
|
94% Prills |
94% Powder |
|
|
Calcium chloride |
≥94.0% | ≥94.0% |
|
Magnesium and alkali chloride(NaCl) |
≤5.5% | ≤3.5% |
|
Water insolubles |
≤0.2% | ≤0.2% |
|
Alkalinity[Ca(OH)2] |
≤0.35% | ≤0.3% |
|
Sulfate(CaSO4) |
≤0.2% |
≤0.2% |
|
FE |
≤0.1% |
≤0.1% |
Calcium Chloride Package
25KG/ 1000KG PP woven bag
Calcium Chloride,Calcium Chloride Flakes,Calcium Chloride Pellets,Calcium Chloride Dihydrate
Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com