饲用苎麻生长动态及其饲用品质研究

2007～2008年，连续2 a对7个饲用苎麻新品系的生长动态、草产量及其饲用品质进行了研究。结果表明：参试品系再生能力均极强，年均刈青10次，单兜分蘖数随刈青次数增加而增加，年均单兜分蘖数最高的达28株；草产量主要集中在4～10月，年鲜草和粗蛋白产量均以1号饲用苎麻品系最高，分别达318.8 t/hm2和12.15 t/hm2，与其他品系差异达极显著，2号品系次之；7个参试品系在平均草层70 cm的粗蛋白含量达20 %以上的有5个，相对饲用价值均可达100 %以上；综合评价为1号和2号2个品系表现最好。

The Growth Dynamics and Forage Quality of Fodder Ramie

Seven new lines of fodder ramie had been observed for two years from 2007 to 2008 in terms of growth and forage yield, and their forage quality determined. The results showed that these new lines had strong regeneration capacity and could be cut 10 times per year. The number of tillers per tuft increased with cutting frequency, and the highest number of tillers per tuft /year averaged 28. The lines produced forage mainly in April to October. Fodder ramie Line No.1 produced the highest annual green forage (318.8 t/ha) and crude protein (12.15 t/ha) in which there was a highly significant difference as compared to all the other lines. Line No.2 was second to Line No.1. Of all the new lines 5 contained more than 20 % of crude protein in the forage when they were 70 cm high by average, and they had a relative nutritive value of more than 100 %. Comprehensive evaluation showed that Lines No.1 and No.2 performed best.