热研4号王草为象草和美洲狼尾的杂交品种，经过十多年的试验选育而成的多年生禾本科牧草。该品种株高、叶量大、产量高、品质好、不开花、利用期长、适应性强，饲料的适口性良好。目前已在我国南方广泛种植，预计在今后五年内将完全取代象草，推广总面积可达100万亩以上，增收 Hot study No. 4 King grass for the grass and the wolf tail of the hybrid varieties, after more than 10 years of test breeding perennial grasses. The variety of plant height, leaf mass, high yield, good quality, no flowering, long period of use, adaptability, feed palatability good. It is now widely planted in southern China and is expected to completely replace grass weeds in the next five years with a total area of ​​over 1 million mu and an increase of income