不同供氮水平对豆禾混播草地草产量及品质的影响  

EFFECTS OF DIFFERENT N LEVELS ON PRODUCTIVITY AND QUALITY OF LEGUME-GRASS MIXTURES

作　　者：土旦加 周学丽 TU Dan-jia(Qinghai Grassland Improvement Experiment Station,Gonghe Qinghai 813000,China)

机构地区：[1]青海省草原改良试验站,青海共和813000

出　　处：《青海草业》2022年第2期7-12,共6页Qinghai Prataculture

摘　　要：筛选青海地区豆禾混播草地的适宜施氮量,为该地区豆禾混播合理施肥提供依据。以青牧1号老芒麦(Elymus.sibiricus L.cv.Qinghai No.1)和豌豆青建1号(Pisum sativum Linn.cv.Qingjian No.1)为材料,设置4个供氮水平处理,N_(0)(0)、N_(50)(50 kg/hm^(2))、N_(100)(100 kg/hm^(2))、N_(150)(150 kg/hm^(2))对其产量、营养品质和相对饲喂价值进行测定,并结合隶属函数分析法进行了综合评价。研究表明:供氮可显著提高豆禾混播草地的草产量和品质,其中N_(150)处理显著提高豆禾混播草地的干草产量、粗蛋白含量、干物质、粗脂肪和相对饲喂价值,并显著降低酸性洗涤纤维和中性洗涤纤维含量(P<0.05)。经隶属函数度进一步综合分析得出,对混播草地的促生作用由高到低为:N_(150)>N_(100)>N_(50)>N_(0)。To find out the appropriate nitrogen fertilizer amount for local Legume-grass mixtures in Qinghai Province.Elymus.Sibiricus L.cv.Qinghai No.1 and Pisum Sativum Linn.cv.Qingjian No.1 were used as a material,4 nitrogen level,N_(0)(0),N_(50)(50 kg N/hm^(2))N_(100)(100kg N/hm^(2)),N_(150)(150 kg N/hm^(2))were used as testes,we determined the yield,nutritional quality and relative feeding value of bean-mixed grassland,and combined with comprehensive analysis by membership function method.The result showed that the nitrogen can significantly improved the yield and quality of the Legume-grass mixtures,where N_(150)significantly improved the dry grass yield,crude protein content,dry matter,crude fat and relative feeding of Legume-grass mixtures,acid washing fibers and Neutral washing fiber content significantly reduced(P<0.05).Through comprehensive analysis by membership function method,the effect on the growth of Legume-grass mixtures from high to low as:N_(150)>N_(100)>N_(50)>N_(0).

关 键 词：豆禾混播 产量 营养品质 隶属函数法 

分 类 号：S813.2[农业科学—畜牧学]