甘肃省不同生态区高产优质小黑麦种质的筛选

Screening of high yield and high quality triticalege notypes in different ecological regionsof Gansu Province

摘要:

采用小黑麦品种石河子大学1号(Shida No.1)和小黑麦新品系(C17、C19、C22、C24、C31)为材料,在甘肃省不同生态区(兰州、合作)进行生产性能和营养品质比较试验,连续两年在不同试验点对小黑麦种质在开花期的生产性能(干草产量、株高、枝条数)和营养品质(粗蛋白、酸性洗涤纤维、中性洗涤纤维、消化率)测定分析,并采用灰色关联度法进行综合比较。结果表明:(1)通过对参试小黑麦种质生产性能进行比较,C31的干草产量(15.51 t/hm2)显著高于其他种质,C24的干草产量(11.27 t/hm2)显著低于其他处理;石大1号的株高(152 cm)显著高于其他种质,C31的枝条数(745.42万枝/hm2)最高,除了与C17(681.25万枝/hm2)无显著性差异外,显著高于其他种质;通过对参试小黑麦种质营养品质进行比较,C24的CP含量(12.36%)显著高于其他种质,C24的NDF(55.38%)含量最低,与C22之间无显著差异,显著低于其他种质。C24的ADF(36.20%)含量最低,显著低于C17、C19。C24的DMD含量(63.08%)显著高于其他种质;(2) 2个试验点,合作小黑麦生产性能(干草产量、枝条数)显著高于兰州小黑麦生产性能(干草产量、枝条数);合作小黑麦干草的CP含量为11.61%,显著高于兰州点(9.85%);合作小黑麦干草的NDF(54.83%)含量显著低于兰州(62.93%);合作小黑麦干草的DMD(64.35%)显著高于兰州(51.10%);(3)多重比较和灰色关联度综合分析结果显示,合作点适合生长的小黑麦为品系C31和C17,更适合参试小黑麦种质的生长发育。

关键词:饲草型小黑麦;生产性能;营养品质;灰色关联度

Abstract:

The production performance (hay yield,plant height,branch number) of 5 triticale new lines (C17,C19,C22,C24 and C31 was compared with the CK (Shida No.1) through gray correlation method in Hezuo and Lanzhou of Gansu Province in 2016 and 2017.The results showed that 1) The hay yield of C31 (15.51 t/ha) was significantly higher than other germplasms,and the hay yield of C24 (11.27 t/ha) was significantly lower than other germplasms.The plant height of Shida No.1 (152 cm) was significantly higher than other germplasms.The branch numbers of C31 (7.45 million/ha) was the highest,and it was significantly higher than other germplasms except for C17 (6.81million/ha).The CP content (12.36%) of C24 was significantly higher than other germplasms.The NDF content of C24 (55.38%) was the lowest,and there was no significant difference with C22,which was significantly lower than other germplasm.The ADF content of C24 (36.20%) was the lowest,which was significantly lower than C17 and C19.The DMD content of C24 (63.08%) was significantly higher than other germplasms.2) At two experiment sites,the production performance of triticale in Hezuo (hay yield,branch numbers) was significantly better than that in Lanzhou (P＜0.05).The CP content in Hezuo (11.61%) was significantly higher than that in Lanzhou (9.85%).The NDF content in Hezuo (54.83%) was significantly lower than that in Lanzhou (62.90%).The DMD content in Hezuo (64.35%) was significantly higher than that in Lanzhou (51.10%).3) The results of multiple comparison and grey correlation analysis showed that Hezuo was more suitable for the growth and development of triticale germplasm.Among tested triticale germplasms,C17 and C31 were the best for growth in Hezuo.

Key words:triticale;production performance;nutritional quality;grey correlation analysis