(A) Selection of salt-tolerant pasture varieties How to increase the survival rate and growth degree of grass seeds is the key to the success or failure of the saline-alkali land. In order to solve this problem, we must first select the appropriate grass species. The ability of herbage to resist salinity varies with grass species. In general, heavy saline-alkali lands should be selected for strong saline-tolerant phloxmae, sandgrass, amorpha, Sesbania, Artemisia sphaerocephala, Caragana korshinskii, Erysiaceae, Elymus palustris, Smilax patens, and Prunus persica , Narrow Ying Lai grass, rice grass, etc.; moderate saline-alkali land can be medium-alkalinity grass seedlings, alfalfa, Mao Zizi, Elymus and so on. (b) One of the important reasons for the deep-rooted soil salinization in plains is the unevenness of the land. By leveling the land, irrigation can be performed or the soil can be evenly distributed when the rainfall is used to wash saline and alkali, and the effect of flushing and desalination can be improved. The method of leveling the saline-alkali soil is the same as that of the general land-based method, but the degree of soil salinity must be paid attention to. For mild saline-alkali land, it is better not to disturb the soil layer, but in the heavy saline-alkali soil or the local saline-alkaline patch, it is necessary to “salt†first and then level it to prevent salt from moving. For saline-alkali land where the salt content is heavy, the surface soil with heavy salt content can be turned upside down and the good soil can be turned upside down to combine with fertilization to establish a new cultivation layer. For saline-alkaline soil with clay interlayer underneath, deep plowing is used to break the plough bottom layer, cut the capillary, reduce soil evaporation, improve soil water permeability, and accelerate soil salt leaching and prevent salt return. (3) Rational farming of soil cultivation in saline-alkali land requires special attention to be timely and reasonable. In arid and semi-arid regions, generally spring is dry and windy, and the amount of evaporation is large. Shallow ploughing should be adopted to ensure salt protection. Spring plowing should be late, and other salt should be ploughed on the surface and then ploughed, or ploughed several days after light rain, in order to press the surface salt to the bottom. Grab the cultivator before the rain in summer, the main role is to get rid of the rough and light soil, create and maintain the appropriate size of the waste, so that more salt accumulation in the waste, will help prevent salt. After irrigation or timely cultivating loose soil after rain, there are obvious effects of salt protection and seedling maintenance. (D) Application of Organic Fertilizers Another reason for the low yield of forage in the saline-alkali land is that the soil fertility is very low. Saline-alkali land is characterized by traits such as leanness, death, and board. Applying organic fertilizers can not only change these undesirable traits and increase soil fertility, but also can reduce surface runoff due to improved soil porosity and structure, increase water infiltration into the soil, and improve leaching. Salt action can also reduce soil evaporation and prevent salt return. With increased soil organic matter and improved fertility, forage grass grows robustly, and its salt and salt resistance increases. (V) Cultivation techniques and measures 1. Deep-seed sowing: Salt distribution in saline-alkali soil profile is more or less less, showing a “t†shape. For example, in the spring, 0 to 5 cm of soil has 2 times higher salt content than the lower layer of soil. ~ 3 times. When sowing, the soil layer with more salt in the surface layer was removed, and the grass seeds were sowed in the soil layer with low salt content, which created conditions for the smooth emergence of the seeds. After trenching, the topography fluctuates and the salt in the soil accumulates in the back of the trench, which relatively reduces the salt content in the soil in the trench. In general, the depth of the ditch is 7 cm to 10 cm, and the ditch is 50 cm. With the ditch, fertilization is followed by sowing. It is also possible to ditch the ditch in advance and then fertilize and soak the rain. 2, shallow sowing: Because the saline-alkaline soil temperature is low, the spring seeding after the slower emergence, grass seed burial in the soil for too long, more salt and water absorption, susceptible to salt and rotten species. When the planting is slightly shallow, the grass germinates and sprouts out after germination, which can relatively reduce salt damage. 3. Timely sowing: In many areas of China, perennial grasses are planted in autumn. Autumn sowing should not be late, because early autumn sowing soil temperature is high, the emergence of fast, more water, less salt, pasture seedlings can avoid salt damage. In addition, early autumn sowing of grass has a sufficient period of growth. The ground and underground parts grow well and accumulate enough nutrients to facilitate wintering and growth in the coming year. Summer sowing should wait for heavy rains to sow, or after the rain has leached, etc. 4, cover sowing. Combining irrigation with salt, desalination, and salt washing before soil preparation, the salt content of the soil in the plough layer will be significantly reduced. On this basis, the mulching film will cover the soil and the salt content will rise slowly, which will keep the salt content of the plough layer at a low level. The time can be extended, which is more conducive to the emergence of seedlings, to achieve full seedlings and strong seedlings. It is better to adopt “flat seed cover†or “ridge seed cover†on mild saline-alkali soil; “ridge seed cover†should be adopted on moderate saline-alkali soil; and “ditch cover†method should be more appropriate on moderate saline-alkali soil. Water storage and protection, reduce the sowing and the soil salt content of the emergence site, conducive to seedling and seedling protection.