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“黑麦草—水稻”草田轮作系统（简称ＩＲＲ系统）在广东省产生了显著的效益。黑麦草作为饲料的应用范围包括了奶牛、奶水牛、肉牛、奶山羊、肉（毛）用兔、实验用兔、猪、鸵鸟、鹅、草鱼等，目前最常见的系统有“稻—草—牛”、“稻—草—鱼”和“稻—草—鹅”。因此，ＩＲＲ系统为发展大农业多种经营提供了重要的物质基础，改善了区域农业生产结构，促进了“三元结构农业”和节粮型畜牧业的发展。ＩＲＲ系统的应用，提高了土地的利用率以及土地单位面积的产出，其经济效益因不同的应用系统而异，一般情况下一个冬季的产出在１．５万元／ｈｍ２以上。
The “Ryegrass-Rice” grassland rotation system (IRR system) has produced significant benefits in Guangdong Province. Ryegrass as feed applications include dairy cattle, dairy buffalo, beef cattle, dairy goats, meat (wool) rabbits, experimental rabbits, pigs, ostrichs, geese, grass carp and so on. The most common system at present is rice- Cow “,” rice - grass - fish “and” rice - grass - goose. “ Therefore, the IRR system has provided an important material basis for the development of diversified management of large-scale agriculture, improved the regional agricultural production structure, and promoted the development of ”ternary structure agriculture" and grain-saving livestock husbandry. The application of IRR system improves the utilization rate of land and the output per unit area of land. Its economic benefits vary with different application systems. Under normal circumstances, the output of one winter is over 15,000 yuan / hm2.