Welcome to Acta Prataculturae Sinica ! Today is Share:

Acta Prataculturae Sinica ›› 2019, Vol. 28 ›› Issue (6): 82-92.DOI: 10.11686/cyxb2018335

Previous Articles     Next Articles

Comparison of production performance and winter survival rate of different fall dormancy alfalfa varieties

WANG Xiao-long1,2, LI Hong2, MI Fu-gui1,*, YU Jie1, WANG Xue-ting1, MENG Kai1, JIA Zhen-yu1, WANG Quan-zhen3   

  1. 1.College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization, Ministry of Agriculture, Key Laboratory of Grassland Resources, Ministry of Education, Hohhot 010011, China;
    2.Institute of Animal Science of Heilongjiang Province, Qiqihar 161005, China;
    3.College of Animal Science and Technology, Northwest Agriculture and Forestry University, Yangling 712100, China
  • Received:2018-05-22 Revised:2018-10-25 Online:2019-06-20 Published:2019-06-20
  • Contact: * E-mail: mfguinm@163.com

Abstract: Selection for fall dormancy in alfalfa can impact other traits such as hay yield, nutritive value, re-growth rate, stem leaf ratio, plant height and winter survival rate. The objective of this study was to identify the optimum alfalfa varieties for cultivation in Hohhot area. A total of eight alfalfa varieties (Caoyuan No.3, Zhongmu No.2, Caribou, Gold empress, Sanditi, Sardi, WL525, WL903) were planted in a regional test field. The experiment used a randomized block design and the eight cultivars were mowed at the early flowering stage in 2015, 2016, and 2017. In order to select the optimal alfalfa varieties, forage yield and nutrient composition, including dry matter (DM), crude protein (CP), acid detergent fiber (ADF) and neutral detergent fiber (NDF) were determined and the relative feed value (RFV) was calculated. The results showed that the winter survival rate of Zhongmu No.2, Caoyuan No.3, and Caribou all exceeded 95%. Together with Gold empress, the four varieties had significantly higher survival rates than the others (P<0.05). In addition, there was a significant negative correlation between fall dormancy and winter survival rate (-0.984; P<0.01). However, there was no significant correlation between fall dormancy and hay yield (P>0.05). The highest hay yield was obtained from Zhongmu No.2 in 2015. The hay yield of Zhongmu No.2 and Gold empress were significantly higher than the other varieties (P<0.05) and Caribou and WL525 had a relative low yield in 2016. In 2017, the top three varieties in hay yield were Zhongmu No.2, Gold empress and Caoyuan No.3. Moreover, the crude protein content of Caoyuan No.3 and Zhongmu No.2 were both greater than 20%. And Zhongmu No.2 had the lowest acid detergent fiber and neutral detergent fiber contents, as well as the highest relative feed value. According to subordinate function value analysis, Zhongmu No.2, Gold empress and Caoyuan No.3 were the optimum alfalfa varieties. In summary, fall dormancy of alfalfa had no significant effect on alfalfa production performance such as hay yield and nutritive value, but was significantly negative correlated with winter survival rate. Our study showed that Zhongmu No.2, Gold empress and Caoyuan No.3 had greater performance than the others in hay yield, winter surviving and nutrition quality, and they were the optimum alfalfa varieties for planting in Hohhot area of Inner Mongolia.

Key words: fall dormancy, alfalfa, varieties test, hay yield, nutritive value, winter surviving rate