串叶松香草(Silphium perfoliatum)原产于北美,属菊科多年生宿根草本植物,为近年从国外引进的高产优质新型饲料作物。其株高2～3米,叶长90厘米,宽30厘米,每年4～9月为生长高峰期,青饲料利用期长达270天,并可连续利用10～15年。该作物无论是产量还是饲用价值都优于玉米、甜高梁,从第二年起亩产青饲料达2万公斤以上,种植一亩可解决40头猪的青饲料。茎叶鲜嫩多汁,营养丰富,孕蕾期干物质中 Silphium perfoliatum is native to North America and belongs to Asteraceae perennial herb. It is a high-yield, high-quality new feed crop imported from abroad in recent years. The plant height of 2 to 3 meters, leaf length 90 cm, width 30 cm, 4 to 9 months a year for the growth period, the use of green feed up to 270 days, and the continuous use of 10 to 15 years. The crop is better than corn and sweet sorghum in terms of yield or feed value, with more than 20,000 kg per mu of green feed from the second year and 40,000 pigs of green feed per mu. Stems tender and juicy, nutrient-rich, dry bud during pregnancy