川西北高寒牧区鸭茅产草量年际动态研究

为了探讨鸭茅(Dactylis glomerata L.)在川西北高寒牧区的生产性能和利用年限,采用田间小区试验的方法,对宝兴鸭茅、川东鸭茅和特纳诺鸭茅3个鸭茅品种连续7年(2003-2009)进行产草量动态观测试验研究。结果表明:鸭茅在该地区种植,产草量成单峰曲线,播种当年草产量较低,次年可形成生产能力,第3,4年草产量达到高峰,之后开始下降,第7年下降至播种后第2年的水平,说明鸭茅在川西北建立人工草地时,播种一次,可连续利用6～7年。

Yield Dynamics of Selected Ochardgrass for Alpine Pastoral Areas in Northwest Sichuan Province

Production performance trials of Baoxing,Chuandong,and Trerano varieties of Ochardgrass(Dactylis glomerataL.) in alpine pastoral areas of northwestern Sichuan were tested and observed for growth and production during 2003-2009 in field plots.Results show that the yield of Ochardgrass grown in this region is low for first-year sowing,followed by increased production capacity annually.Yields peak at third and fourth years,then decline.Seventh-year grass production declines to the second-year level.Results indicate that established Ochardgrass grassland can be sustainable for six to seven years after sowing.