American Pennisetum

American Pennisetum is also known as Imperial Valley. There is a long history of cutting culture in our country. In history, it is usually used as a tribute to pay tribute to the emperor. There are still sporadic local varieties of cutting culture, such as Gansu Minqin Imperial Valley, Hunan Pearl Millet, Tanghe Pearl Millet and so on. The largest cultivated area in the world and the most widely distributed area is the tropical grasslands in Central Africa and West Africa at 10°18°N latitude. The most productive and used food and feed crops are also some countries in Africa and South Asia with high temperature, drought and low rainfall. .

1. Biological characteristics:

An annual, grain and forage type Pennisetum graminea. The plant is luxuriant, the plant type is compact, the plant height is about 250cm, the root system is developed and dense, the average tiller is 12.7, the highest is 20, the stem tiller is 4-6, the stem is upright, round, short internodes, many leaves, main There are 17 stem leaves, lanceolate, 67.2cm long, with ripples on the leaf edge, soft, smooth, and disease-free; stalk-like inflorescence, empty candle-like, 25cm long, 3400 grains per stalk, 1000-grain weight 6g, single The plant weighs 90.72g, the seeds are gray, the rice is hard, off-white, and edible. After 120 days of growth in the North Sea, the green is mature. After the seeds are harvested, the straw remains bright green.

The yield is high. In the Yangtze River Basin, the general cutting level is 10 tons/mu. During the growth period, there is no pests and diseases, but the grains are sweet. When the seeds are sowed and mature, they are easily harmed by underground pests and birds. It is not inverted and suitable for planting in a wide area of ​​the Yangtze River Basin. Good quality, high crude protein content, for both grain and feed. In the offspring of hybridization, the traits are separated obviously, and the biological yield is obviously reduced. Therefore, the offspring of hybrids should not be reserved.

2. Planting methods and precautions:

1. Land preparation: Seeds have small grains, thin seed coats, and are easy to germinate, but the ability of the young shoots to top soil is weak. Therefore, it is necessary to create a good seed germination bed, finely plow, and finely chop the soil, and sown under suitable moisture conditions.

2. Sowing: Sowing when the ground temperature is stable above 25°C. In the middle and lower reaches of the Yangtze River, the sowing period is generally from late April to mid-May. Apply enough seed fertilizer to preserve the seedlings, dress the seeds with medicament before sowing or apply poisonous soil after sowing to prevent damage from underground pests; when sowing, apply shallow soil (sowing depth of about 1 cm) to facilitate the emergence of seedlings, and the sowing rate is 1.5 kg/ Acres, drill or broadcast can be used, preferably 40~50cm row spacing, drill sowing, no thinning; when using the second green, thinning, the number of seedlings per hectare is 75,000 to 90,000.

3. Fertilization: base fertilizer Pennisetum americanum has developed root system, strong fertilizer absorption rate and high biological yield. Enough base fertilizer should be applied. Generally 40-50 kg/mu of compound fertilizer, or 50 kg/mu of carbon, 40 kg/mu of phosphate fertilizer, and 20 kg/mu of pressed fertilizer, are required to be dispersed fertilization and turned into the ground. If organic fertilizer is used, the amount of chemical fertilizer can be appropriately reduced. Topdressing: In order to speed up the growth of seedlings, topdressing 5-10 kg/mu of urea when the seedlings grow to a height of 15 cm, and then topdressing 10-15 kg/mu of urea for each cutting, combined with inter-cultivation and soil restoration.

4. Management: American Pennisetum grows slowly and is easily invaded by other weeds, so it should be cultivated and weeded in time to promote early division. In case of dryness in the seedling period, water should be timely. Pennisetum is a forage that requires more fertilizer. Only under high-fertility conditions can it exert its yield-increasing potential. Therefore, 10 kg of urea per acre is applied after each mowing.