Planting Performance of Several Elephant Grass Species in Northern Guangxi Zhuang Autonomous Region

几种象草在桂北地区的种植表现（英文）

This study aimed to screen suitable species of Pennisetum purpureum for planting in northern Guangxi Zhuang Autonomous Region. During 2012-2014, a comparative field trial was carried out in Lingyun County of Baise City in northern Guangxi to compare plant height, yield, stem-leaf ratio and nutrient composition am-ong Pennisetum purpureum Schumab cv. Purple, P. purpureum Schum cv. Guimin and P. purpureum Rich ＆#215; P. americana King grass cv. Reyan No.4. The results in-dicated that average annual fresh yield of P. purpureum Schumab cv. Purple reached 141.4 t/hm2, which was 2.3 t/hm^2 higher than that of P. purpureum_Rich×P. americana_King grass cv. Reyan No.4; both average annual fresh yield of these two species was lower than that of P. purpureum Schum cv. Guimin. Stem-leaf ratio of P. purpureum Schumab cv. Purple was the lowest （1.17）, which was 17.8% lower compared with P. purpureum Schum cv. Guimin, with significant differences （P〈0.05）, indicating that P. purpureum Schumab cv. Purple had more leaves. Crude protein content of P. purpureum_Schumab cv. Purple was slightly lower than that of P. purpureum Rich×P. americana_King grass cv. Reyan No.4, while P. purpureum Schumab cv. Purple was superior to P. purpureum Schum cv. Guimin and P. pur-pureum Rich ×P. americana_King grass cv. Reyan No.4 in other indicators. Specifi-cal y, P. purpureum Schumab cv. Purple contained 26.6% of dry matter, 39.1% of nitrogen-free extract and 2.9% of crude fat.

为了筛选出适合种植于桂北地区的象草品种,试验于2012~2014年,在桂北地区的广西百色凌云县对紫色象草(Pennisetum purpureum Schumab cv.Purple)、桂闽引象草(P.purpureum Schum cv.Guimin)、王草(P.purpureum Rich×P.americana King grass cv.Reyan No.4)进行了种植比较试验。测定了株高、产量、茎叶比、营养成分等。结果表明:紫色象草平均年产鲜草141.4 t/hm^2,比王草高2.3t/hm^2,二者均低于桂闽引象草;紫色象草的茎叶比最低,为1.17,比桂闽引象草低17.8%,差异显著(P<0.05),说明紫色象草叶量丰富;营养方面,紫色象草除了粗蛋白略低于王草之外,其他指标均较王草和桂闽引象草优,含干物质26.6%、无氮浸出物39.1%、粗脂肪2.9%.