Abstract：Italian ryegrass (Lolium multiflorum) is widely grown in southern China from December to May of the next year. It is also one type of palatable digestible and leaf annual forage as hay and silage during the entire season. However, due to the high annual precipitation in this area and the humid climate, Italian ryegrass supplied unbalancedly as hay. Silage is found to be an ideal way of producing forage in southern China. It is very positive to explore Italian ryegrass silage for developing grassland animal husbandry in this area. Therefore, this was a review about silage techniques development of Italian ryegrass, the usages and effects of silage additives were also mainly discussed in southern China. By summarizing, wilting silage technique is one important silage technique for Italian ryegrass, but it is not suitable in high humid season. Besides, Italian ryegrass silage with additives will become the major way in future. The silage additives include acid, lactic acid bacteria, cellulase, water soluble carbohydrate and mixing additives. Formic acid, propionic acid and sorbic acid are frequently used as acid additive which is the fermentation inhibitor. Lactic acid bacteria, cellulase and water soluble carbohydrate are used as the fermentation accelerant. Mixing additives are referred to mixing lactic acid bacteria, enzyme, sugar, and other minerals to be one additive, but its effect on forage silage was different based on different researches. In addition, the mixing silage could solve the problem of high moisture content in Italian ryegrass, and it would be a properly extension and application perspective in the productive practices.
