论文部分内容阅读
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81.16t/hm~2,干草产量达19.03t/hm~2;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,但其优良功能性状及生态功能在试验区具有较大发展潜力。
Adaptability evaluation of Sorghum sudanense (Hay-King) Stapf. Introduced in Yuanmou, a typical area of dry-hot valley in Yunnan Province. The results showed that the growth of S. sudanensis was 95 days with black seeds and bright seeds with an average height of 220.0 cm and strong regenerative ability. After tillering, the number of tillers increased up to 58 with brown midrib. Under dry conditions of extensive management, , The annual mowing can be cut 3 ~ 4 times, the average yield of fresh grass reaches 81.16t / hm ~ 2 and the hay output reaches 19.03t / hm ~ 2; The high nutritional value, the crude protein content reaches 17.64% Cattle and sheep and other herbivores feeding. In a word, the dry and hot climatic conditions of Yuanmou affect the yield to a certain extent, but its excellent functional traits and ecological functions have great potential in the experimental area.