First, the advantages of sowing grass in the autumn (A) The autumn broadcast overcomes the spring drought problem encountered in spring sowing. After a summer and autumn with relatively concentrated rainfall, the water content in the soil is relatively high in the autumn, and due to the gradual fall in autumn temperatures and shortened sunshine hours, the evaporation of soil moisture is reduced. Therefore, the autumn soil has a good lyrical condition. At this time, sowing can make the soil have relatively sufficient moisture to ensure the seed germination. (b) Seeding in the autumn can overcome the problem of weed coverage and growth problems encountered in spring sowing. Grass seeds are generally small, especially some legume grasses such as alfalfa and clover, and perennial grasses such as ryegrass and fescue. Often due to small seeds and slow seedling growth, these grasses do not grow as quickly as they grow in spring. Back to green weeds grow fast, and weeds are often covered with weeds. Grass sowing is performed in autumn. Since most of the weeds gradually die and die at this time, they generally do not have an adverse effect on the growth of forage seedlings. (3) Seeding in the autumn will benefit the germination and growth of pasture in the following spring. The pasture planted in autumn has developed after the end of autumn and winter. The roots are basically established and firm. In the spring of next year, the returning green time is earlier than that of weeds, and the growth is faster than that of weeds, which can quickly form coverage and inhibit the growth of weeds. (IV) Autumn sowing of pasture can prevent wind erosion in soil in winter and spring. Many winter and unused lands are planted only in the spring of the coming year after the autumn harvest. There is a lack of vegetation coverage throughout the winter and spring seasons. When the weather conditions are relatively dry and the temperature is high, the surface soil in the wintertime can be found. Wind erosion will occur, and dust will be generated in the event of wind, especially in the spring. In recent years, one of the most important factors in dust storms and dusty weather in China is wind erosion from winter resorts. Wind erosion brings not only the loss of topsoil, but also the loss of nutrients in the soil and affects the fertility of the soil. When autumn pastures are planted on these winter resorts, the wind erosion of the soil can be greatly reduced due to the fixing and covering of pastures. Second, high-quality pasture suitable for autumn planting Because of the many advantages and advantages of planting pasture in autumn, experts recommend that the majority of pasture growers should plant cultivated forage in the autumn. However, due to the different species of forage grasses, there are significant differences in the biological characteristics and botany characteristics of each pasture variety, and the suitable season for cultivation cannot be the same. However, after many years of cultivation experiments, we found that the pastures that can be cultivated in the fall are: (i) Annual grasses for pasture. Dongmu 70 rye, octoploid triticale, high cold-resistant Italian ryegrass, and cruciferous charcuterie. The time for the growth of these pastures has been cut and used since the fall of September-October until the end of May and the beginning of June of the coming year. During this period, although the number of cuts and the amount of grassland harvested may vary due to different breeds, overall, it can effectively solve the problem of inadequate supply of green fodder for livestock and poultry in winter and spring. (b) Perennial herbage. Almost all varieties can be sown in the fall. The grasses cultivated in autumn are mainly perennial ryegrass, eucalyptus, and cocksfoot; the leguminous pastures are mainly alfalfa, white clover, sand wangwang, grass hibiscus, etc.; Herbs of Pinus edulis and Pinaweed; Rumex k-1 hybrids of Polygonaceae; Synthetic grasses of Boraginaceae. When sowing grass is sowed in the autumn, it is generally necessary to wait until the corn is harvested and then sowing. The grasses such as Compositae, Polygonaceae, and Borago can be cultivated first in the nursery, and then the crops can be moved after they are harvested. plant. In order to ensure that the forage seedlings are full-grown and able to safely pass winter. Planting and seeding should be done as early as possible to ensure that the roots of pasture have grown below the frozen layer before frost and freezing. In places where conditions permit, wintering water should be poured before winter. In order to ensure the safe wintering of pasture seedlings, it is also possible to cover the crop stalks in the grassland or apply the soil manure in the grassland to insulate the forage grass seedlings. (c) Forages of the same species differ due to the ecological characteristics of their respective habitats. When sowing, the season of sowing must be determined according to its different ecological requirements. For example, alfalfa has introduced many varieties from abroad in recent years. The quality level varies greatly, and the price is also quite different. For example, the price difference between Wangwang and Algang is much higher, and the former is nearly three times that of the latter. In fact, because of the difference in origin, the dormancy period is also different. There are great differences in cold resistance and frost resistance. Different regions should broadcast different varieties, and different seasons should also select different varieties for sowing. The spring or autumn sowing It has different effects on the growth and development of different alfalfa varieties. In the autumn sowing, you can choose to import a variety of lower dormancy, mainly King, King and some local varieties, such as in Shandong Province can be planted without defects. The selection of perennial ryegrass also has this problem. In the autumn sowing of perennial ryegrass species in Shandong Province, Victoria perennial ryegrass and Tetriolite perennial ryegrass should be selected. Instead of choosing low-growing perennial ryegrass for cheap, it will affect grass production in the coming year. China Agricultural Network Editor
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