Abstract: Brachiaria ruziziensis G.et E.cv.Reyan No.15 was native in African and firstly introduced from CIAT in 1991.Its ecological adaptability was then evaluated in 1992-1994 in greenhouse and field.Later,the comparative trial,regional trial and productive trial were carried out during 1994-1996,1999-2004,and 1999-2005,respectively.The preliminary results show that B.ruziziensis G.& E.cv.Reyan No.15 had a high forage dry matter yield of 209865.83 kg/hm²·a,very significantly higher(54.43%) than that of B.brizantha cv.Reyan 6 and significanty higher(43.76%) than that of B.decumbens cv.Reyan 3,respectively.It was adaptable to the warm and tropical climate with altitude range from 1000 m to 2000 m,reasonably high annual rainfall of morn than 1000 mm,and could endure hot dry spells morn than 5 months.It required a soil of high fertility and could tolerate acid soils,especially in pH 4.5~5.0.It was suitable for natural pasture improvement,establishment of high yield and good quality grazing pasture,and also for the water and soil erosion control.

Key words: Brachiaria ruziziensis G.et E.cv.Reyan No.15, Selecting and breeding, Utilization

摘要： 1991年从哥伦比亚国际热带农业研究中心(CIAT)引入6095刚果臂形草(Brachiaria ruziziensis G.et E.CIAT6095),1992-1993年在网室和田间进行生态适应性观测,1994-1996年进行品种比较试验,1999-2004年进行区域试验,1999-2005年在海南、云南和福建进行生产试验。结果表明:热研15号刚果臂形草产草量达209865.83 kg/hm²·a,极显著(P<0.01)高于热研6号珊状臂形草(B.brizantha cv.Reyan 6)54.43%,高于热研3号俯仰臂形草(B.decumbens cv.Reyan 3)43.76%;热研15号刚果臂形草喜湿润热带气候,适宜在海拔1000~2000 m,年降水1000 mm以上的热带、亚热带地区生长,具有良好的耐旱能力,在pH4.5~5.0和极端贫瘠的土壤具有良好的持久性和丰产性;适于建植高产、优质、耐久的放牧型草地;固土护坡能力强,适于作水土保持的先锋草种。

关键词: 热研15号刚果臂形草, 选育, 利用