10个披碱草属野生植物材料生产性能综合评价

Comprehensive evaluation of productivity performance of ten wild Elymus accessions

摘要:

以 10 个来源于不同生境的 4 龄披碱草属野生植物材料为研究对象，通过对其生产性能和营养价值进行评价，筛选高产优质的种质，为优良种质选择及繁育等奠定基础。研究表明：西藏老芒麦 (XZS6)株高最高，较天祝老芒麦(TZS5)和天祝垂穗披碱草 TZN7、TZN8、TZN9 和 TZN10 分别提高了 67. 96%、49. 51%、45. 89%、26. 64% 和 47. 97%(P＜0. 05)；干草产量最高的西藏老芒麦(XZS2)较最低的天祝老芒麦(TZS5)提高了 137. 04%(P＜0. 05)；TZN10 的粗蛋白含量较 XZS2 提高了 36. 76% (P＜0. 05)；天祝垂穗披碱草(TZN9)的粗脂肪含量较新疆老芒麦(XJS1)、天祝老芒麦(TZS5)、西藏老芒麦(XZS6)、天祝垂穗披碱草 TZN7 和 TZN8 分别提高了 13. 97%、29. 60%、41. 98%、50. 72% 和 22. 35%(P＜0. 05)；酸性和中性洗涤纤维含量最低的为 TZN8 和 TZN7，分别较含量较高的新疆老芒麦(XJS1)和西藏老芒麦(XZS6)降低了 26. 33% 和 21. 17%(P＜0. 05)；新疆老芒麦(XJS4)的 P 含量最高，较含量较低的 TZN8 提高了 78. 50%(P＜0. 05)。通过灰色关联度综合分析，西藏老芒麦(XZS2)、 新疆老芒麦(XJS1)、天祝垂穗披碱草 TZN7 和 TZN8 综合表现好，产量和营养价值均较高。

Abstract:

Ten species of wild Elymus accessions from different habitats were selected as the research objects. Through the evaluation of their production performance and nutritional value，accessions with high yield and quality forage were identified which laid the foundation as germplasms for the selection and breeding of new forage crops. Our research showed that Xizang E. sibiricus (XZS6) had the highest plant height，which increased by 67. 96%， 49. 51%，45. 89%，26. 64% and 47. 97% compared with Tianzhu E. sibiricus (TZS5) and Tianzhu E. nutans TZN7， TZN8，TZN9 and TZN10，respectively (P＜0. 05). The hay yield of Xizang E. sibiricus(XZS2) was 137. 04% (P ＜0. 05) higher than that of Tianzhu E. sibiricus(TZS5). The CP content of TZN10 was 36. 76% higher than that of XZS2(P＜0. 05). The EE content of TZN9 was the highest (4. 16%)，which was significantly higher than those of Xinjiang E. sibiricus (XJS1)，Tianzhu E. sibiricus(TZS5)，Xizang E. sibiricus (XZS6)，Tianzhu E. nutans (TZN7and TZN8)，increasing by 13. 97%，29. 60%，41. 98，50. 72% and 22. 35% (P＜0. 05)，respectively. Com‐ pared with Xinjiang E. sibiricus (XJS1) and Xizang E. sibiricus(XZS6)，Tianzhu E. nutans TZN8 and TZN7 had the lowest content of ADF and NDF with the decreases by 26. 33% and 21. 17%(P＜0. 05). The P content of Xinji‐ ang E. sibiricus(XJS4) was the highest，which was 78. 50% higher than that of TZN8(P＜0. 05). Based on the cus‐ ing grey correlational analysis，Xizang E. sibiricus(XZS2)，Xinjiang E. sibiricus(XJS1)，Tianzhu E. nutans(TZN7) and Tianzhu E. nutans(TZN8) showed good comprehensive performance and high nutritional values.