-
The causes and hazards of the prevention and control of flower saltiness are introduced as follows
Saline-alkali soil is a general term for saline soil and alkaline soil, as well as various salinized and alkaline soils. The salts contained in saline soils are mainly sodium chloride and sodium sulfate. Alkaline soil is a type of soil containing sodium carbonate, sodium bicarbonate and potassium sulfate.
When the salt content of the soil surface layer is above, the flowers are damaged or cannot grow normally. The affected plants are dwarfed, the leaves are dark green, the root system is poorly developed, and even the whole plant is dead.
The main reasons why saline soil damages flowers are:
Saline soil often forms a layer of white saline-alkali skin on the surface, which will directly damage the rhizomes of seedlings, and cause the death of flower seedlings in severe cases; Under the action of high concentration of salts, the leaf stomata cannot be closed, so that the flowers lose water and wither and die; Excessive salt concentration can hinder the root system from absorbing water from the soil solution, causing flowers to die due to drought; Excessive salt content in the soil can disrupt the normal metabolic function of the plants. Flowers planted in alkaline soil mainly showed weak growth and green leaves after damage.
The causes of the onset are:
Alkaline soil can fix iron, which is absorbed by plants, resulting in leaf greening and yellowing. Soil with too much alkalinity will destroy the structure of the soil and form an alkaline layer with very poor water permeability, and it is difficult for water to penetrate into it, making it difficult for seeds to be unearthed, and even if they are unearthed, the root system cannot penetrate the alkalization layer and cannot survive. It can increase the application of well-decomposed organic fertilizer to improve the physical and chemical properties of the soil.
Methods to prevent and control flower salinity:
The soil selected for potting plants generally uses humus soil and peat soil, so that the potting soil is slightly acidic or acidic to prevent salinity; Use neutral or slightly acidic water for watering; Acidic or physiological acidic fertilizers are used for fertilization, and alkaline soils are suitable for applying chemical fertilizers such as potassium nitrate and ammonium sulfate, but alkaline fertilizers such as ammonia and carbon ammonia are not suitable for use. Then it is to choose flowers that are resistant to saline-alkali soil, and the flowers that are resistant to salt include Wannian Spring, Saxiwei Orchid, etc. Most of the cactus plants, except for epiphytic cacti such as crab claw orchid, have a certain ability to resist alkali.
Oleander, hibiscus, geranium, chrysanthemum, yueji, etc. also have a certain resistance to weak alkalinity. If there is a physiological disease, it is easy to show symptoms on the leaves. The young leaves turn yellow or the lower leaves are curled and yellowed and keep falling off, most of the reasons are due to overwatering.
However, the symptoms of soil damage caused by excessive alkaline soil are similar to those caused by drought, causing flowers and plants to grow slowly, and the leaves to turn green, shrivel and scorch.
-
Saline-alkali soil is a general term for saline soil and alkaline soil, as well as various salinized and alkaline soils. The salts contained in saline soils are mainly sodium chloride and sodium sulfate. Alkaline soil is a type of soil containing sodium carbonate, sodium bicarbonate and potassium sulfate.
When the salt content of the soil surface layer is high, flower seedlings can be damaged, and most flowers cannot grow normally when the above is exceeded. After the damage, the plant is dwarf, the leaves are small and dark green, the root system is poorly developed, and even the whole plant dies.
The main reasons for saline soil to damage flowers are: Saline soil often forms a layer of white saline-alkali skin on the surface, which directly damages the rhizome junction tissue of seedlings, and causes the death of flower seedlings in severe cases. The concentration of salt is too high, which prevents the root system from absorbing water from the soil solution, causing the flower to die due to physiological drought.
Under the action of high concentration of salts, the leaf stomata cannot be closed, so that the flowers lose water and wither and die; The soil contains too much salt, and the cell protoplasm is damaged, which disrupts the normal metabolic function and poisons the cells. Flowers planted in alkaline soil mainly show symptoms such as weak growth, leaf greening, wilting and scorching after damage.
-
The cause of flower disease is that alkaline soil can fix iron and convert soluble iron in the soil into insoluble iron, so it cannot be absorbed and utilized by flowers, resulting in leaf loss and yellowing. Because iron is a catalyst for the formation of chlorophyll and a metal element composed of a variety of enzymes, the lack of iron does not allow chlorophyll to form, thus causing the leaf color to turn yellow.
The soil with too much alkalinity destroys the structure of the soil, deteriorates the physical and chemical properties of the soil, and forms an alkalization layer with very poor permeability, which expands and sticks when wet, and is hard and compacted when dry, and it is difficult for water to penetrate into it, and the seeds are not easy to be unearthed, even if they are unearthed, the root system cannot pass through the alkalization layer and cannot survive.
1.Pest control method: spray 40% dimethoate 1500 times liquid, in addition to scale insects, other pests can also be sprayed percent. >>>More
Generally, if it is saline-alkali land, the water in that place will be saline-alkali water, all kinds of saline-alkali soil are formed under certain natural conditions, and the essence of its formation is mainly the redistribution of various soluble salts in the horizontal and vertical directions on the ground, so that the salt gradually accumulates on the soil surface in the salt collection area. The main factors affecting the formation of saline-alkali soil are: >>>More
<> 6 8 generations occur in the cotton area of the Yellow River Basin every year, and they begin to migrate from late June to early July, and the peak period of damage is from early August to late September, and it begins to subside in early to mid-October. The algebraic differences in the cotton area of the Yangtze River basin are quite large, and the rampant period is from mid-July to mid-September. The reproduction of cotton leafhoppers increased in high temperature and drought, and the damage was aggravated. >>>More
Aphids, also known as vegetable aphids, greasy insects, etc., including peach aphids, radish aphids and cabbage aphids, are one of the main pests of cruciferous vegetables such as cabbage. >>>More
Cattle influenza is an acute, febrile and systemic infectious disease of cattle caused by a virus, mainly affecting cattle, high-yielding dairy cows and cattle in late pregnancy, with severe symptoms and high mortality. Sick cattle and healthy cattle come into contact and are infected through the respiratory tract, and blood-sucking insects such as mosquitoes and flies can indirectly transmit the disease. The disease is ferocious, spreads quickly, and is endemic, with the rainy and high temperature of June and September as the frequent season. >>>More