There are several types of pastoral livestock husbandry: first, direct use in grazing; second, feeding for barley; third, silage for silage; fourth, artificial drying to make hay products; It can be used to extract certain nutrients such as leaf protein. Modulation of hay and production of hay products are important methods for harvesting and processing pasture. Quality hay should be rich in leaves, with more inflorescences and shoots. In terms of odor and color, the quality hay should be dark green and have an aromatic smell. To prepare high-quality hay, we must first master the cutting techniques and drying techniques of pasture. When the pasture is harvested, the height, season, and methods all have an impact on the quality of pasture. The greatest impact is on the time and height of the cutting. 1. The time of pasture cutting. At the beginning of growth, forage grass has young and soft stems and leaves, high protein, vitamins, and minerals, low crude fiber content, high nutritional value, and good palatability, but the grass yield per unit area is low, especially because Higher moisture makes it difficult to modulate hay. With the growth and development of herbage, its fiber content gradually increased, protein and vitamin content decreased, palatability decreased, digestibility also decreased, palatability decreased, digestibility also declined. Therefore, when weeds are harvested, we must not only take care of pasture yield, but also take into account the changes in the harvest and digestibility of various nutrients of pasture. At the same time, we must also consider pasture cutting time on pasture regeneration, number of pasture clippings, and perennial grasses. The impact of the next year's output. In general, the content of dry matter, digestible protein and vitamins in forage legumes during the booting stage is the highest; the dry matter content of the forage grasses at the heading stage is the highest. The nutrient content of leguminous pasture at the end of flowering stage and that of grasses at the fruiting stage were lower by 75%-85% per hectare of feed unit compared with their respective early flowering stages and heading stages. 2. The height of pasture cutting. When the forage grass is cut and stayed too high, on the one hand it will lead to a reduction in the amount of pasture grass production, and the grass output material will not be fully harvested. It has been determined that when the height of the earthworm is kept at 10 cm, the loss of pasture residues is 25% to 30%. On the other hand, grass roots containing large amounts of nutrients are not harvested, affecting the quality of pastures. In particular, if weeds are kept at a height of 12 cm higher than the height of 6 cm, the loss of protein is 46% higher. When pasture is cut, it is too low. It may be that the grass production will be higher that year, but it will often cause the growth point to be cut off. This will not only affect the growth of the upper part of pasture and grassland, but also affect the growth of the underground part, resulting in the growth of new shoots affecting the underground. Part of the growth, resulting in weakened growth of new shoots, grass whole plant decreased viability. Continuous low cutting of perennial forages will cause a sharp decline in the growth of pasture. In general, when the grass is cut, such as white clover and red clover, the height of the alfalfa is 3 cm to 4 cm, and the grass stays like grasshoppers, perennial ryegrass, and chicken grass. The height of the earthworm is 5 cm to 6 cm, and the height of the large forage grass such as Mexican corn, Sudan grass and forage sorghum is 10 cm to 15 cm. 3. The methods and methods of pasture cutting. Forage cutting can be harvested manually or mechanically. Both harvesting methods should be completed within a short period of time when harvesting, and the loss of pasture production and quality during harvesting should be minimized.
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