内蒙古中部地区不同苜蓿品种生产性能评价

Evaluation on the Productive Performance of Alfalfa Varieties in the Central Inner Mongolia

分别于2019~2021年初花期,对2018年种植的国内外16个苜蓿品种的草产量、营养成分和相对饲用价值进行分析,筛选适于内蒙古中部地区种植的优良品种。结果表明:(1)依据饲草产量,16份材料可划分为以下3个类群:高产类群包括草原3号、三得利、中苜2号和龙牧803(12.00~13.96 t/hm^(2));中产类群包括甘农3号、察北、WL323、惊喜、公农2号、赛特、敖汉、草原2号(10.00~11.19 t/hm^(2));其余4份材料属于低产类群(8.58~9.99 t/hm^(2)),尤以新疆大叶最低。(2)不同苜蓿品种干草产量均表现为第一茬>第二茬>第三茬,第一茬干草产量占总产量的54.32%~62.97%,对苜蓿总产量影响最大。(3)ADF与NDF呈显著正相关关系(P<0.05),相对饲用价值与CP含量呈正相关关系,与NDF和ADF呈极显著负相关关系(P<0.01)。饲草产量与CP和相对饲用价值呈正相关,与NDF和ADF含量呈负相关。综合饲草产量及营养品质(CP>18%,NDF<45%,ADF<35%),中苜2号、龙牧803、草原3号和三得利表现较好,适合在内蒙古中部地区推广种植。

In order to select excellent alfalfa varieties suitable for planting in the central part of Inner Mongolia,the experiment was conducted from 2019 to 2021 to analyze the forage yield,nutrient composition and the relative feed value(RFV)of 16 alfalfa varieties planted in 2018 at home and abroad were analyzed.The results showed:(1)According to the forage yield,the sixteen varieties could be divided into the following three groups:the high-yield groups(12.00~13.96 t/hm^(2))include Caoyuan No.3,Sanditi,Zhongmu No.2 and Longmu 803;The medium-yield groups(10.00~11.19 t/hm^(2))include Gannong No.3,Chabei,WL323,Surprise,Gongnong No.2,Saite,Aohan,and Caoyuan No.2;and the others four varieties assigned to low-yields group(8.58~9.99 t/hm^(2)),especially Xinjiang Daye.(2)The hay yield of all varieties was the first cut>the second cut>the third cut,the hay yield of first cutting crop accounted for 54.32%to 62.97%of the total yield,and had the greatest impact on the total yield of alfalfa.(3)There was a significant positive correlation between ADF and NDF(P<0.05);RFV was positively correlated with CP content and negatively correlated with NDF and ADF(P<0.01).Forage yield was positively correlated with CP and RFV,and negatively correlated with NDF and ADF content.Comprehensive evaluate of forage yield and nutritional quality(CP>18%,NDF<45%,ADF<35%)found that Zhongmu No.2,Longmu 803,Caoyuan No.3 and Sanditi had better performance and were suitable for planting in central Inner Mongolia.