What is a saline land?
Saline-alkali land is affected by the saline-alkali components in the soil, including various saline and alkaline soils and other types of soils with different degrees of salinization and alkalinization. When the accumulation of water-soluble salts in the surface or subsurface of the soil exceeds 1-2g/kg or the alkalinization of the soil alkalizing layer exceeds 5%, the soil belongs to the saline-alkali land range. Saline soils include saline soils, alkaline soils, and different degrees of salinized and alkalized soils.
The families with the most alkali-tolerant plants are Quinoa, Poaceae, Asteraceae, Legumes, etc., and the number of species in these four families accounts for 46.2% of the total number of alkali-tolerant plant species.
Commonly used in green grass species are as follows:
Shrub seeds: locust, purple locust, ailanthus tree, mulberry tree, salt-skinned wood, white elm, etc
Ground cover plants: Tian Jing, Red Bean Grass, Alfalfa, Polymer Grass, Small Crown Flower, Reed Fescue, Satawang, Grass tree tree, creeping shearing, etc
1. Acacia: it can grow in soil salinity of 0.2% to 0.3%, and has nodules in the roots that can directly fix nitrogen, which is a pioneer tree species for afforestation in sand and alkali land.
2. Purple locust: strong salinity tolerance, can be planted in the soil salinity content of 0.45%. It is an excellent fertilizer, feed, fuel and sand fixation and soil retention shrub tree species, it grows fast, has strong fertility, and is resistant to barrenness and drought. There are also nodules in the roots, nitrogen fixation improves the soil, and it is an excellent tree species for saline-alkali land improvement.
3. Ailanthus tree: resistant to micro-alkali, the suitable range of pH is 5.5~8.2. Suitable for loam or sandy loam soils with deep layers of neutral or calcareous soils, medium resistance to chlorine gas, and strong resistance to hydrogen fluoride and sulfur dioxide. Fast growth, deep roots, strong germination. Ailanthus has a strong tillering root.
4. Mulberry tree: Our company successfully planted feed mulberry in the saline alkali land of the Yellow River beach
5, salt skin wood: like warm and humid climate, but also can tolerate a certain cold and drought. Soil requirements are not strict, acidic, neutral or limestone alkaline soils can grow, barren and thin, not water and moisture resistant. The root system is well developed and has a strong tillering nature
6. White Elm: strong resistance to urban pollution, especially strong resistance to hydrogen fluoride and soot. It is also one of the main tree species for creating windproof forests, soil and water conservation forests and afforestation of saline-alkali lands.
Ground cover plants:
1, Tian Jing: Tian Jing is an annual herb of the legume family, with strong salt and alkali resistance, barrenness and flood resistance, rapid growth, strong stress resistance, is a pioneer plant along the beach, saline land, drought and barren land, but also high-quality green manure. Tian Jing's nodules and stem tumors can fix nitrogen, nitrogen fixation capacity is 20-30 times higher than soybeans, plant height, fast growth, high biological yield, crude protein content is also very high, so it is widely used to improve soil, organic fertilizer, papermaking, extraction of field gum, oil extraction, protein extraction and other aspects
2. Red bean grass: the saline alkali land where red bean grass is planted, and the desalination rate in the soil layer of 0-20 cm can reach 56.5%.
3. Alfalfa: The saline alkali land where alfalfa is planted, the desalination rate in the soil layer of 0-20 cm is about 36%.
4. Grass and trees: it can grow well in the calcareous neutral or slightly alkaline upper soil, and is suitable for pH 7~9. It is highly resistant to salinity, drought and cold. The grass and trees germinate 5 to 7 days after sowing and grow rapidly.
5. Sathawang: Sathawang has strong drought resistance and has the characteristics of hardiness, barrenness, salt resistance and wind and sand resistance. When sowing seeds by plane, pellet seeds are commonly used (the seeds are coated with a thin layer of fertilizer and soil)
6, small crown flower: small crown flower in spring, summer and autumn can be sown. Grows well in fertile neutral to slightly alkaline soils and is not suitable for acidic soils. In the saline alkali land where small crown flowers are planted, the desalination rate in the soil layer of 0-20 cm is about 23%.
7, reed fescue: is the preferred breed for the development of saline-alkali lawn, fast speed of pingping, drought resistance, heat resistance, flood resistance, barrenness resistance, trampling resistance, mild pest and disease hazards, and shrubs with planting, can play a good role in improving soil, solid soil and water retention.
8, creeping shear strands: its salt resistance and flood resistance is better than the general cold season lawn grass.
The above grass species are common green grass species, which are highly adaptable, and are more used in the use of improved saline-alkali land, while the cost is relatively low. Follow-up Xiaobian will continue to sort out and improve the relevant information, the treatment of saline-alkali land is imperative, because saline-alkali land is an important land reserve arable land resources, rational and effective use of saline soil, salt-tolerant plants, saltwater resources is an important measure to alleviate the shortage of water and soil resources in China, stabilize grain production, and improve the ecological environment.
Breeder: Evergreen [15838020301] reminds you that suitable for planting and adapting to local conditions!