以陇葵杂3号为试材，在年均降水量415 mm的半干旱区进行了全膜双垄沟播栽培与施钾对旱地油用向日葵籽仁品质的影响试验。结果表明，全膜双垄沟播栽培较露地油葵籽仁粗脂肪、油酸含量分别增加了15.4、13.6 g/kg，亚麻酸含量显著提高了16.7%。施钾对油葵籽仁粗脂肪、油酸、亚麻酸均有显著影响，随着施钾量的增加呈递增趋势，以施钾量为120 kg/hm2时最好，较不施钾油葵籽仁粗脂肪、油酸含量分别显著增加29.5、10.6 g/kg，亚麻酸含量显著提高22.2%。综合考虑油葵籽仁粗脂肪及脂肪酸组分油酸、亚麻酸等因素，全膜双垄沟播和施钾可显著改善旱地油葵籽仁品质，以施钾量以120 kg/hm2的效果最好。

In semi-arid areas with an average annual rainfall of 415 mm， Oil sunflower Longkuiza 3 was used as experimental material， the experiment was carried out full Plastic-film double-furrow sowing cultivation and potassium application on seed quality of oil sunflower. The results showed that contents of crude fat and oleic acid of oil sunflower increased respectively 15.4 g/kg， 13.6 g/kg under full plastic-film double-furrow sowing cultivation compared with open field， and content of linolenic acid increased by 16.7%. Potassium rates have significant effects on crude fat， oleic acid and linolenic acid， with the increase of potassium rates， which of oil sunflower all showed increasing trend， and above-mentioned indices reached to the peaks under 120 kg/hm2. Compared to no potassium， contents of crude fat and oleic acid increased by 29.5 g/kg， 10.6 g/kg， and content of linolenic acid increased by 22.2% respectively. The crude fat， oleic acid and linolenic acid of sunflower were considered comprehensively， the seed quality of sunflower could be improved significantly by full plastic-film double-furrow sowing cultivation and potassium application， and the effect of potassium rate of 120 kg/hm2 was obvious.

S565.5

国家重点研发计划(2016YFD0200101)；国际植物营养研究所(IPNI)中国项目(IPNI-2014-CHN-MP01)；公益性行业(农业)科研专项(201503120)；甘肃省农业科学院科技创新专项(2017GAAS28)。