China's Tibet region is more than 2,500 meters above sea level,which belongs to a relatively harsh ecological environment.Such an ecological environment has brought great challenges to people's lives in Tibet....China's Tibet region is more than 2,500 meters above sea level,which belongs to a relatively harsh ecological environment.Such an ecological environment has brought great challenges to people's lives in Tibet.There is a vast land and herds of cattle and sheep in Tibet,and the breeding of cattle and sheep requires a large amount of high-quality forage grass.Under the influence of a relatively harsh ecological environment in Tibet,livestock forage grass in winter and spring seasons is always extremely scarce.How to restore the ecological environment of the grassland is a matter that people in Tibet are trying to solve.The selection of forage grass varieties has a great impact on this matter.As a kind of excellent forage grass,oat grass naturally also gets people's attention.展开更多
文摘China's Tibet region is more than 2,500 meters above sea level,which belongs to a relatively harsh ecological environment.Such an ecological environment has brought great challenges to people's lives in Tibet.There is a vast land and herds of cattle and sheep in Tibet,and the breeding of cattle and sheep requires a large amount of high-quality forage grass.Under the influence of a relatively harsh ecological environment in Tibet,livestock forage grass in winter and spring seasons is always extremely scarce.How to restore the ecological environment of the grassland is a matter that people in Tibet are trying to solve.The selection of forage grass varieties has a great impact on this matter.As a kind of excellent forage grass,oat grass naturally also gets people's attention.
文摘通过燕麦草单播以及与光叶紫花苕、箭筈豌豆和毛苕子等3种苕子的混播试验,研究和比较燕麦草在单播和混播下饲草的生产性能和营养品质,为燕麦草的合理化利用提供依据。当燕麦草单播的播种量为225 kg/hm 2、与豆科牧草混播的播种量为75 kg/hm 2情况下,进行饲草田建植,然后在生长第二年分别测定饲料田的株高、生物量以及营养成分等指标,探讨了燕麦草在单播以及混播下牧草生长特点和营养水平。结果表明:(1)无论单播还是混播,牧草在抽穗-扬花(现蕾-开花)期生长速度最快,盛花期时牧草的株高为102.38~114.58 cm,其生长高度与生长天数的关系可以用logistic方程来表示来拟合;(2)成熟期混播牧草的生物量分别为781.33 g DM/m 2、712.71 g DM/m 2和697.40 g DM/m 2,分别比单播提高21.97%(P<0.05)、11.26%(P<0.05)和8.87%(P<0.05)。(3)花期混播牧草粗蛋白含量为9.67%~10.58%、比单播提高39.94%~53.11%(P<0.05),另外,粗纤维含量也得到显著降低。总之,燕麦草与苕子混播,可提高株高和生长速度,显著提高饲草的产量和品质。在混播的3种苕子中,光叶紫花苕更有利于提高混播草群的稳定性,更有利于提高饲草的产量和营养水平。
