Analysis Of Mixed Seeding Pasture Of Grass And Alfalfa On Saline-alkali Soil In Hailiutu

In order to explore the suitable planting methods and techniques for mixed-sown grassland in the shallow saline-alkali region of the Tumochuan Plain in Inner Mongolia,the suitable mixing and mixing ratios in the region were studied,and the suitable grass-sucking mixed sowing method was preliminarily determined.And the specific effects of grass-alfalfa mixed sowing on the improvement of local saline-alkali land.Provide data reference and technical support for the planting of artificial grassland and sustainable use of light saline-alkaline soil in the region.In this study,the new wheat straw,the stalked stalk,and the long-eared stalk were mixed with the grassland No.3,and the soybean-weed mixed ratio was 1:1,1:2,1:3.To explore the growth,yield,nutrient composition index of forage grass under different mixing and mixing ratios,and the effect of mixed grassland construction on the physical and chemical properties of saline-alkali soil,and determine the most comprehensive planting of mixed grassland on the saline-alkali land in the Tumochuan Plain of Inner Mongolia.Good sowing method,mixed mix and sowing ratio.The main findings are as follows:(1)Mixed planting can promote plant growth,and when the ratio of bean to grass is 1:3,the promotion effect on pasture is most obvious.(2)The important purpose of artificial grassland establishment is to obtain high-quality,high-yield pasture.Therefore,pasture yield and nutritional value are particularly important.In this study,among the various mixed combinations,the main factor determining the yield of forage was the proportion of alfalfa in the mixed sowing.The combination with the highest yield in the first year of planting and planting was the mixture of long-eared buckwheat and alfalfa in a ratio of 1:1.The highest nutritional value is the combination of new wheat straw and alfalfa,which has the highest protein content and the lowest acid detergent fiber content.(3)Compared with cockroaches and grasses unicast,the crude protein content of cockroaches and grasses increased during the mixed planting,and the ash content decreased,but the fat content decreased and the cellulose content increased.(4)Mixed sowing grass can significantly improve the physical and chemical properties of the soil,increase soil organic matter,total nitrogen content,and reduce soil pH.In summary,the mixed cultivation of alfalfa and grass has a good improvement effect on saline-alkali soil in the same year,and it is an effective method to improve mild saline-alkali soil.