元谋干热河谷区海狮苏丹草引种与适应研究

对云南干热河谷典型区元谋引入的海狮苏丹草[Sorghum sudanense (Hay-King) Stapf.]进行适应性评价。结果表明：海狮苏丹草生育期95 d,种子黑亮,平均株高220.0 cm,再生能力强;刈割后分蘖数增多,可达58个,具褐色中脉特性;在元谋干热气候粗放管理条件下,年可刈割3～4次,平均鲜草产量达81.16 t/hm2,干草产量达19.03 t/hm2;营养价值高,粗蛋白含量达17.64%;适口性好,可用于牛羊鱼等草食动物饲养。总之,元谋干热气候条件在一定程度上影响其产量,但其优良

Introduction and Adaptability Evaluation of Sorghum sudanense(Hay-King) Stapf. in Hot Arid Valley of Yuanmou County

The present study was intended to bring a new grass named Sorghum sudanense (Hay-King) Stapf. into Yuanmou country, a typically place which was dry and hot arid zone, and evaluate it's adaptability. The results showed that S. sudanense (Hay-King) Stapf. growth period is 95 days and has regeneration ability, seed is black and produced at an average height of 220 cm; tillers increased after cutting, the number can be up to 58, characteristic by brown midrib; with extensive management in the conditions of hot dry climate, it can be mowed annually 3-4 times and the average fresh yield is 81 162.54 kg/hm2 and hay yield 19 033.21 kg/hm2; the grass has a great nutritional value, the content of crude protein (CP) is up to 17.64%; the grass is palatable and can be used for rearing herbivores such as cattle and sheep even fish. In summary, to a certain extent the yield is affected by hot and dry weather, but its good functional traits and ecological function showed a great development potential in the tested area.