(a) finishing the land. The root systems of forage grasses are well developed, and they are also widely spread in the ground. Therefore, it is necessary to deepen the soil and, under the possible conditions, generally 20-30 cm in depth (not suitable for deep turning in saline soil areas). As grass seeds are generally small, the amount of sowing is also less, so the soil preparation should be flat and fine, so as not to affect the emergence. At the same time as the site preparation, it is necessary to open a drainage ditch. In areas with a lot of rain, the distance is usually 4 to 6 cm to facilitate drainage in the fields. (b) timely and appropriate sowing. Spring sowing grass can be carried out when the ground temperature reaches 10°C. In the south, it is usually from late March to early April. Autumn sowing grass should be carried out in September. However, it should be noted that autumn is often arid or long-term rainy, and the latest can not be later than 10 month. The seeding rate depends on the size of the seed, the purity of the seed, and the germination rate. When sowing, it is best to soak the seeds with warm water at 60°C for 1–2 hours, so that the seeds can emerge 2–3 days ahead of schedule and increase the germination rate by about 10%. Conditional available plant ash seed dressing, that is mixed with broadcast. Repeatedly as many times as possible, plant height spacing 46--60 cm, shorter spacing can be narrower, usually 25--30 cm. (c) Rational fertilization. Fertilization is particularly important for obtaining high-quality, high-yielding pastures. In particular, grasses need more nitrogen nutrition. Under conditions permitting, more organic manure should be used as a basal fertilizer, and 1,500 to 2,000 kilograms of pig manure etc. per 0.067 hectares before soil preparation should be turned into the soil. Nitrogen fertilizers were applied top-dressing and were applied at seedling stage and after each castration. (d) Timely tillage, weeding and irrigation. Herbage grows slowly at the seedling stage and is often easily invaded by weeds, so pay attention to cultivating and weeding. After it is closed, it will have the ability to compete with weeds. Afterwards, it will only inhibit the growth of weeds by combining fertilization and cultivating loose soil after each cutting. In some areas, drought often occurs in early spring and autumn, and irrigation is needed in time to facilitate the regeneration of pasture and Wangfa. (e) Use of castration. It is generally determined based on the feeding subject and the needs and the growth of the pasture itself. Castration was too early, the yield was low, and adverse recurrences occurred; castrate was late, the grass was thick and old, and the nutrition was reduced. The use of castration to feed goose, legumes were mostly before the initial flowering, and grasses were before the jointing. The height of the flowers is 3--10 cm. With the increase in the number of cuttings, the height of the flowers is gradually increased. The cutting time should be better in the evening or rainy days to facilitate regeneration. It is best not to castrate in freezing cold and high temperature and drought, so as to avoid freezing and seedlings. China Agricultural Network Editor
