摘要
羊草是我国优质的乡土草种,在天然草地改良和人工草地建植中发挥着重要作用.本试验选择 6 个羊草种质材料(草都1 号、草都2 号、吉生1 号、多伦羊草、海拉尔羊草、长岭羊草),2018-2022 年在呼伦贝尔市连续开展4 年的羊草小区试验,通过对比不同种质和种植年限羊草生长的农艺性状和饲草品质,评价和筛选适宜高寒地区羊草人工草地建植的种质.结果表明:种质对羊草饲草产量和品质均有极显著影响,草都 1 号羊草新材料 4 年平均产量和饲草品质(粗蛋白含量、相对饲用价值)均显著高于其他种质,4 年平均干草产量达到 10 297 kg·ha-1,海拉尔羊草产量和品质最低;种植年限对饲草产量有显著差异,种植第4 年产量最高,种植年限对粗蛋白含量无显著差异;密度和株高共同解释生物量变化的86.4%.因此,草都1 号种质新材料最适宜在该气候区域羊草人工草地建植中应用.
Abstract
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.
基金项目
国家重点研发计划(2022YFF1302803)
内蒙古自治区科技重大专项(2021ZD004502)
NETL
NSTL
万方数据