以当地油葵主栽品种BF999为对照，研究了引进的18个油葵品种其在定西市安定区的适应性、丰产性及其主要农艺性状与产量的相关性。结果表明，参试油葵品种生育期113～123 d，品种间差异不大，在当地均能够完全成熟；均属中高秆型、中等型盘径，茎粗、叶片数、百粒重、单盘粒重等性状均属中等型。其中Syn0011、Syn0002、Syn0004平均折合产量表现突出，比对照品种BF999分别增产24.6%、22.01%、15.23%，适宜在定西旱寒区种植。从油葵6个主要农艺性状之间及其与产量的相关性分析可以看出，单盘粒重和茎粗与产量呈极显著正相关，盘径与产量呈显著正相关，表明单盘粒重越重，茎粗越粗，盘径越大，产量也就越高。单盘粒重、茎粗、盘径可作为油葵丰产性选育的田间考察指标，在高产品种的选择上要注意选择单盘粒重、茎粗、盘径表现突出的品种。

BF999， the main cultivar of local oilsunflower， was used as the control. The adaptability， high yield and the correlation between main agronomic characters and yield of 18 oil sunflower cultivars in Dingxi Anding District of Dingxi City were studied. The results showed that the the growth period of testing cultivars from 113 to 123 days， difference is not big， in the local can fully mature；All cultivars are medium or high of plant height， medium type disc diameter， stem diameter， leaf number， hundred grain weight and disc seeds weight are medium type. The average yield of Syn0011， Syn0002 and Syn0004 was outstanding， which was 24.6%， 22.01% and 15.23% higher than that of CK BF999， respectively. They were suitable for planting in the drought and cold regions of Dingxi. In addition， from the correlation analysis between the six main agronomic traits and yield， we can see that the grain weight and stem diameter per disc are significantly positively correlated with yield， and the disk diameter is significantly positively correlated with yield， indicating that the heavier the grain weight per disc， the thicker the stem diameter， the bigger the disk diameter， the higher the yield. Single disc grain weight， stem diameter and disc diameter can be used as field investigation indexes for high yield breeding of oil sunflower. In the selection of high-yielding cultivars， attention should be paid to the selection of single disc grain weight， stem diameter and disc diameter.

S565.5

定西市发展壮大蔬菜产业专项资金科技提升项目(DXSK2018006)。