An important factor constraining the development of the feedlot industry and the low effect of raising pigs is the shortage of green fodder. Practice has proved that pig farmers can plan to provide greenery for the four seasons, as long as they plan a green feed planting area of ​​about 10 square meters per pig, adapt to local conditions, and have strong adaptability, simple management, low pests and diseases, and abundant nutrient-rich high-yielding green fodder. Anniversary balance greatly reduces pig raising costs. Several kinds of feed rotation modes suitable for specialized pig farmers (fields) are introduced as follows. 1. Spring and Autumn "double season" rotation of Russian feed dishes. The Russian feed vegetable is a perennial perennial plant. The trial species showed that it has the characteristics of wide adaptability, rich nutrition, good palatability, cold resistance, and strong disease resistance. The leaves are hypertrophic, grow in clusters, and the tillers are extremely fast, yielding fresh grass per mu. More than 2 kilograms is four to five times that of other pastures. It is generally planted two seasons in February-March and August-September. When the bottom leaves from the yellow-green tan to the highest yield, the most abundant nutrients for the appropriate period of harvest, harvesting 35 cm -65 cm, leaving 5 cm -6 cm, quarters can be cut 5 times -6 times. (2) The herb of the series of pineleaf and ryegrass is a good species of pasture introduced in China for many years and is suitable for feeding pigs. Generally, the yield per mu can reach more than 3,000 kg. The sowing date is March - April and the green period is May - October. Castration begins 40 days after sowing and can be cut once every two weeks or so. The winter grazing - 70 ryegrass is a winter pasture, the sowing date is from September to October, and can be cut once in November - December, March - April and May - June in the following year. The per mu yield is about 1000 kg. . Ryegrass is the best variety to solve the lack of fodder in winter and spring, and can be widely used in winter. 3. American grain pods and ryegrass American grain pods are suitable for planting from April to May. The first pod can be harvested after one and a half months after sowing, and can be raked once every 25 days. The time for the green supply is July -10. In the month, the output per acre reached 2000 kg-2500 kg. 4. Black West Corn + Greater China Winter Forage Black West Corn is a new type of green feed corn, with the characteristics of tillering, strong regeneration and high yield and quality, with 30 to 60 branches per culm, and up to 90 One, generally sowing in mid-April every year, beginning in mid-May, cutting and utilization, every 15 days and 20 days can be cut once, and the green period is from May to October. The Greater China Pasture is a kind of winter pasture with strong adaptability, cold-tolerant and drought-tolerant, and easy to control and manage. In the September-November period in the southern region, the Central Plains and North China are planted from late August to late October. When the plant height reaches 40 centimeters, the first crop can be castrated. Once every 40 days - 50 days, it can be harvested. From March to April of the following year, the yield per mu can reach 2000 kilograms. 5. Water Lily + Ladle This is the way of green promotion in China's rural areas for many years. Water lettuce is a high-yield, high-quality aquatic green feed. It has the advantages of rapid growth, low cost, and no arable land. The output of mu is 2000 kg - 4000 kg. All areas can be stocked on a large area from March to April when the temperature rises to 20°C. The sooner the stocking is carried out, the higher the number of harvests and the higher the yield. When the water surface is full, you can fish it in time. The harvested area cannot exceed 1/5 of the total area. It can be harvested until late November. Four-seasoned chard is one of the common sources of green fodder. It is generally sown in August. It can be cut once every 20 days from late October to next May. The output per mu is about 1,500 kilograms.
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