Comparative studies on forage production and quality of six Leymus chinensis germplasms in alpine regions
As a native forage in Inner Mongolian grasslands,Leymus chinensis plays important roles in restoration of degraded grass-lands and development of artificial pasture in northern China.Six Leymus chinensis germplasms(Caodu No.1,Caodu No.2,Jisheng No.1,Dunlun,Hailaer and Changling)were selected to evaluate the effects of germplasm and growing years on forage yield and quali-ty in the year of 2018-2022 in Hulun Buir City,China,and the agronomic characteristics(plant height,density and forage biomass)and forage qualities(crude protein,neutral detergent fiber,acid detergent fiber,relative feed value)were determined across 4 years.The results showed that germplasm had significant impacts on yield and quality of L.chinensis.The 4-year average yield and for-age quality(crude protein content,relative feed value)of the germplasm Caodu No.1 were significantly higher than other germ-plasms,with the 4-year average hay yield of 10297kg·ha-1,while the yield and quality of Hailaer germplasm were the low-est.Growing years had significant effects on forage yield,with the highest yield in the fourth year,while no significant effects of grow-ing years on crude protein content.Density and plant height jointly explained 86.4%variation of biomass changes.Therefore,the germplasm Caodu No.1 is an ideal germplasm for development of L.chinensis artificial pasture in alpine regions of northern China.
Leymus chinensisgermplasmforage productionforage qualityalpine region
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