黄河三角洲盐碱地不同柳枝稷品种生长特性比较

Comparative study on the growth characteristics of different switchgrass varieties in saline-alkali soil of the Yellow River Delta

关键词:  柳枝稷  品种  盐碱地  农艺性状  适应性

Key words:  switchgrass  variety  saline-alkali soil  agronomic trait  adaptability

摘要:

采用田间随机区组试验方法，分析4个品种（系）柳枝稷（Alamo、JAp-014、CHp-005和CAp-017）在黄河三角洲盐碱地1~3年生的株高、分蘖数、叶长、叶宽和产量等农艺性状，并用灰色关联度分析法评价了其适应性，以期筛选出适合该地区种植的柳枝稷品种。结果表明：4个品种（系）柳枝稷在连续3年生长过程中，株高、叶长、叶宽和产量差异显著，按Alamo、JAp-014、CHp-005和CAp-017顺序呈递减趋势，3年生Alamo最高分别达到211.80 cm、54.90 cm、1.57 cm和7.20 t/hm²；株高、叶长、叶宽与产量之间均有显著的相关性。不同品种间的分蘖数则因生长年限而异。4个品种（系）柳枝稷加权关联度和等权关联度均为Alamo > JAp-014 > CHp-005 > CAp-017，表明Alamo适应性强，为供试品种（系）中最适宜在黄河三角洲盐碱地种植推广的品种。

Abstract:

The objective of this study was to select suitable switchgrass varieties for large scale cultivation in saline-alkali soil of the Yellow River Delta. The plant height, tiller number, leaf length, leaf width and yield of four switchgrass varieties (Alamo, JAp-014, CHp-005 and CAp-017) were determined during a 3-year experiment with complete randomized block design. Grey correlation analysis was applied to evaluate their adaptability. The results showed that:The plant height, leaf length, leaf width and yield of the four switchgrass varieties were significantly different throughout the 3-year experiment, with the order of Alamo > JAp-014 > CHp-005 > CAp-017. The Alamo at 3-year-old had the maximum plant height, leaf length, leaf width and yield of 211.80 cm, 54.90 cm, 1.57 cm and 7.20 t/hm², respectively. Tiller number varied according to the plant age. There were significantly positive correlations between the above agronomic traits. Both weighted grey correlative degree and grey correlative degree of different switchgrass varieties in descending order was Alamo > JAp-014 > CHp-005 > CAp-017. Therefore, Alamo was suitable to be cultivated on large scale in saline-alkali soil of the Yellow River Delta due to its superior adaptability.