Which crops are more salt tolerant?

The low-lying saline-alkali land has low terrain, poor drainage, and strong evaporation, resulting in the continuous accumulation of salt on the surface, and the deterioration of hydrological and geological conditions. Therefore, in afforestation in low-lying saline-alkali land, it is necessary to carefully select tree species. Arbor.

Species: Black locust. The roots of Robinia pseudoacacia can directly fix nitrogen, and it is a pioneer tree species for afforestation in sandy and alkaline land, but it is not suitable for planting in low-lying land with poor drainage. Weeping willow.

It likes to live in wetlands and watersides, is moderately tolerant to salinity, and can be used as an important shelterbelt tree species in saline-alkali land. Salix. It is one of the fast-growing tree species in sand-alkaline land, which is resistant to water and moisture, and is suitable for growing on mild sulfate land.

It can be planted on both sides of the river channel and saline-alkali depression in the waterlogged area, and should be used as a pioneer tree species and charcoal forest. It is also a good tree species for farmland shelterbelts. Tree of heaven.

It grows quickly, is a pioneer tree species for early afforestation in saline-alkali land, and can protect banks and winds. It can be planted on both sides of the channel and on the sides of the road on higher ground. Bead tree.

The salt tolerance is second only to that of Robinia pseudoacacia, which can grow on dry and barren saline-alkali land, with few insect pests, fast growth and strong germination ability. Populus tomentosa. It grows well in fertile and moist places, grows normally in lightly saline-alkali land, and can tolerate short-term flooding.

It is suitable for fast-growing and high-yield forests, farmland shelterbelts and excellent tree species for greening on all sides. Hybrid poplar. For example, 46 poplars and 69 poplars in Zhonglin grow normally under the condition that the soil salt content is 0 5, the perennial groundwater level is less than 1 meter, and there is water accumulation in the rainy season, which is a good fast-growing tree species for timber forests, shelter forests and greening on all sides.

White elm. It is more tolerant to salinity and alkali, and the soil salt content does not exceed 0 4 when it grows well. It can be used as an excellent tree species for timber forests, farmland shelterbelts and greening on all sides.

Mulberry. It is very resistant to salt and water, and can be planted on both sides of farmland shelterbelts. Pear.

It is one of the hardy, waterlogging-tolerant and moderately salt-tolerant fruit tree species, such as using Du pear as the rootstock for grafting pear trees, which is more waterlogging and alkaline. It grows on soils with a salt content of 0 6. Apricot.

It is one of the most saline-alkaline tolerant fruit trees. Jujube. The requirements for the soil are not strict, except for swamp land and heavily alkaline land, it can be cultivated.

It has a strong adaptability to soil pH, and there are no strict requirements for the level of groundwater level, and there is no obvious effect on the growth even when the water is 30 cm or 70 cm and lasts for 30 days. Paulownia.

It is suitable for the growth of sand-alkali land, mainly as a farmland shelter forest, but it is afraid of flooding and does not tolerate moisture. Shrub species Purple locust.

It grows rapidly and has strong adaptability, and can be used as a low-level forest tree in the windbreak belt in saline-alkali sandy areas, and grows well when the soil salt content is 0 4. Ash strips. It can grow on low humidity soils with a salt content of 0 2 0 5.

It can be used for greening trees and cultivating ash stems. It can survive and grow after many days of flooding. Strange willows.

Drought-tolerant, barren-resistant, highly salt-alkali resistant, windproof, sand fixation, bank revetment, both sides of channels at all levels in saline-alkali areas and saline-alkali land where grass and trees do not grow can be planted. Willow. Deciduous shrub, rapid growth, strong adaptability, mild salinity tolerance, sand fixation revetment.

It is suitable for planting in mild saline-alkali wetlands, riverbank alkaline land, plain slopes, and sand-alkali wastelands.

Among crops, sugar beets are very salt-tolerant, and cotton, sorghum, etc. are also relatively salt-tolerant. The salt tolerance of the same crop is also different at different growth and development stages. Usually sensitive to salinity at the seedling stage and not salt-tolerant; As the plant grows, its tolerance for salt increases.

Therefore, various farming measures can be adopted in agricultural production, so that crops can avoid the harm of salt during the growth period when they are most sensitive to salt, so as to obtain higher harvests.

Salt-tolerant plants include wolfberry, jujube, yueji, single-leaved vitex, purple locust, hibiscus, luobuma, ash, arborvitae, acacia, pear, neem, weeping willow, poplar tomentosa, etc.

The adverse effects of too much soluble salt in the soil on plants are called salt damage, and the ability of plants to tolerate salt damage is called salt tolerance. Some plants have developed adaptations to salt transport in phylogeny, and such plants are called halophytes.

Salt-tolerant plants adapt to water stress due to salinization through osmotic regulation of cells. The main mechanism of salt tolerance in plants is the regionalized distribution of salt in cells, and the accumulation of salt in vacuoles can reduce its damage to functional organelles. Some plants accumulate absorbed salt isolates in vacuoles.

Plants can also reduce cell permeability and water potential by synthesizing osmotic substances such as soluble sugars, betaine, and proline, thereby preventing cell dehydration.

Salt-tolerant shrubs: wolfberry, jujube, yueji, single-leaved vitex, purple locust, hibiscus, luobuma,

Salt-tolerant trees: ash, acacia, acacia, pear, neem, weeping willow, poplar

Analysis: Among the plants, there are no real halophytes, and only plants with different salt tolerances can be distinguished. For example, sugar beet and millet are very salt-tolerant, followed by cotton, sorghum and sunflower, and legumes are very weak.

Tamarix, sand date, sand sand grass, purple locust, herbaceous, vine mangrove and so on.

Salt-tolerant plants have high salt resistance, even in the soil with relatively high salt content, they can grow normally, and the body can be discharged through the salt glands in the stems and leaves after absorbing salt, and will not make the salt accumulate in the body, but salt-tolerant plants contain a certain salt content in order to absorb water and nutrients normally.

The characteristic of salt-tolerant plants is that they have good salt resistance, even in the soil with high salt content, salt-tolerant plants can be discharged through the salt glands in the stems and leaves after absorbing salt, and will not accumulate salt in the body, so it can grow normally in the soil with high salt in time.

Plants growing on saline-alkali soil need to contain a certain salt content in the body, if the content is too low, it can not absorb water and nutrients from the soil, if the content is too high, it will cause higher damage to the plant itself, so salt-tolerant plants need to maintain a certain salt concentration in the body.

There are still many salt-tolerant plants in the living and staring, such as alkali grass, tamarix, reed, mangrove, fluffy alkali and other plants are salt-tolerant and can grow in salt land, among which tamarix is a typical salt-alkali resistant plant, the plant height is about 2 3 meters, and the flowering period is between May and June.

Acacia is also a saline-alkali tolerant plant, the requirements for soil quality are not strict, there are drought resistance, labor resistance, sand pressure resistance and cold resistance and other characteristics, the economic value of Acacia purpurea hail is relatively high, it is widely used in highway slope protection, weaving industry, etc., and has a broad development prospect.

Basically all the greenhouses are next to the field seedlings, in the agricultural reclamation area there is a unified greenhouse base seedlings, in many areas of Heilongjiang Province the soil pH value is high, many growers of the seedbed soil is also directly in the ground, so the soil taken out is also saline-alkali soil, not suitable for the growth of seedlings.

Especially for the rice direct seeding field, the direct seeding rice is directly planted in the field by rice seed germination, and grows directly in the field, if the soil pH value is greater than 7, and there is no alkali solution method, the direct seeding rice is unwilling to take root, and it is easy to die seedlings, grow slowly, and reduce the yield in autumn.

Saline disturbs the middle ground.

Clause. 3. The salt content in the soil is too high.

This is also the most important point that is most easily overlooked! Everyone knows that a sudden high pH value is not conducive to the growth of rice seedlings, but few know that high salt content is even more terrible! The salt content in the normal soil has little effect on the growth of rice, but the salt content is above it, and dead seedlings, black seedlings, and seedlings are not willing to grow when it reaches a point in areas with gentle mountains.

Therefore, in order to avoid or reduce the process of acid adjustment, the appropriate soil should be selected when selecting the soil, if the conditions are not fully available, as long as the soil pH value is between, the salt content can be raised normally, and the soil pH value in this range of seedlings growth difference is not obvious.