Hybrid Pennisetum is a triploid hybrid produced by the diploid Pennisetum americana and the tetraploid herbaceous grass. Its progeny are not robust, and production is usually propagated with a hybrid seed or propagated vegetatively. This species is a tropical pasture planted in the middle and lower reaches of the Yangtze River. Generally, it produces 150,000 kg/ha of fresh grass. The fresh grass has high crude protein content and relatively balanced amino acid content. It is a good feed for feeding livestock and fish. In recent years, the planting area has developed rapidly. 1 Characteristics of hybrids Pennisetum roots are dense and fibrous roots are well developed. The root distribution is mainly in the 0-20 cm soil layer. The stems are round, clustered, and hard and erect. The average plant height is about 3.5m and there are 20 individual tiller grades. After multiple mowing, childbirth can be multiplied. The leaves are long and alternate, and the leaves are 60--80cm long and 2.5cm wide. Leaf margin dense bristles, leaves with thin hair, the middle ribs. The panicles are columnar, yellow-brown in color, 20--30cm in length, 2--3cm in spike diameter, and spikelets in spikelets. Because it cannot form pollen, or pistil dysplasia, it is generally not strong. The hybrid Wolf-tail grassland produces tropics and subtropics, so the warm and humid climate is most suitable for growth. In general, the daily average temperature reaches 15°C when it begins to grow, and it grows fastest at 25--30°C. When the temperature is lower than 10°C, the growth is significantly inhibited. When the temperature is lower than 0°C, it will be frozen to death. Hybrid Pennisetum has strong stress resistance and can grow in most soils. Fertile and moist soil is very beneficial to the high yield of forage grass. It is lodging-resistant, drought-resistant, moisture-tolerant and salt-tolerant. It has been planted in Nanjing for many years without any obvious pest or disease. The general output is 150,000 kg/ha, and the yield of fresh grasses in high-yielding fields can reach 225,000 kg/ha. 2 High-yielding Cultivation Techniques 2.1 The site preparation of hybrid Pennisetum roots is well-developed and requires deep soil layers. Generally, the deep plowing is 30cm. It is best to deep-seed frozen pods in winter to ensure loose soil. In March, we squatted to make squats and squat width of 4m. We should open a set of ditch in the field to avoid accumulation of water in the fields. This field was transplanted in the middle and late April. 2.2 Breeding Seedlings should be raised with hybrid seed. Seedbed organic fertilizer 15,000 kg/ha, or pure nitrogen 300 kg/ha, plus 300 kg/ha of superphosphate. The middle and lower reaches of the Yangtze River were planted in late March. The seedbeds were planted at 22.5-30.0 kg/hectares and sowed in thin rows with a 15-18 cm spacing. First open the ditch, apply insecticides, control the underground pests to bite the seeds, and set up a small shed to cover with the film after sowing. Seed bed temperature is best controlled at 20-25 °C, after sowing to keep the soil moist, in order to maintain a broadcast seedlings. When the seedlings grow to 3 to 4 straight leaves, fertilizer can be applied once and 30-45 kg/ha of urea can be applied. After fertilization, the cultivator will bury the fertilizer in the soil, and in case of drought in the nursery, artificial irrigation should be performed. 2.3 When the seedlings grow to 6-8 leaves, they can be transplanted to Daejeon. The seeds and seedlings for 1 hectare can be planted with 30--40 hectares of field, 45,000 hectares per hectare for field cultivation, and the spacing between rows is 30cm x 60cm. 1 seed per hole. 2.4 Field Management When hybrid pennisetum moved into the field, due to the low temperature and slow growth, weeds quickly invaded the land and pressed the pennisetum. Therefore, early weeding is very important. After cultivating live trees, timely cultivating loose soil should be used to promote the increase of ground temperature and fertility. 3 The suitable height for cutting the pennisetum in time is about 1.3m, which will affect the yield too early and affect the quality too late. The remaining height is generally 15-18cm. Too high or too low will affect regeneration and production. After each castration, timely fertilization and cultivating should be performed. It is generally cut 4--5 times/a, and the annual output is 15,000--22,200 kg/ha. The grass supply period in South China is about 300d/a, and the supply of grass is 180--220d/a in the middle and lower reaches of the Yangtze River. Fresh grass can be supplied from early June to the end of October. 4 Use Fresh grass that is cut at a height of 1.3m can be used to feed large animals. If it is used to feed rabbits, geese and other livestock as fish feed, the harvesting height is 70--100cm and can be harvested 8-10 times/a. According to tests, 25 kg of fresh grass can produce 1.5 kg of fresh fish. Due to the relatively rigid stalks of Pennisetum hybrids in the later stages of growth, they can be chopped for 1–2 times in spring and used as silage. China Agricultural Network Editor