| Effects of potassium fertilizer type and application time on yield and quality of oil sunflower |
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| DOI：10.7606/j.issn.1000-7601.2019.05.28 |
| Key Words: oil sunflower potassium chloride potassium sulfate potassium application period yield yield components quality |
| Author Name | Affiliation | | ZENG Jun | Gansu Academy of Agricultural Sciences, Dryland Agriculture Institute, Lanzhou，Gansu 730070, China
Key Laboratory of High Efficiency Water Utilization in Dry Farming Region, Lanzhou, Gansu 730070, China | | GUO Tian-wen | Gansu Academy of Agricultural Sciences, Dryland Agriculture Institute, Lanzhou，Gansu 730070, China
Key Laboratory of High Efficiency Water Utilization in Dry Farming Region, Lanzhou, Gansu 730070, China | | ZHANG Ping-liang | Gansu Academy of Agricultural Sciences, Dryland Agriculture Institute, Lanzhou，Gansu 730070, China
Key Laboratory of High Efficiency Water Utilization in Dry Farming Region, Lanzhou, Gansu 730070, China | | LI Shu-tian | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | DONG Bo | Gansu Academy of Agricultural Sciences, Dryland Agriculture Institute, Lanzhou，Gansu 730070, China
Key Laboratory of High Efficiency Water Utilization in Dry Farming Region, Lanzhou, Gansu 730070, China | | LIU Xiao-wei | Gansu Academy of Agricultural Sciences, Dryland Agriculture Institute, Lanzhou，Gansu 730070, China
Key Laboratory of High Efficiency Water Utilization in Dry Farming Region, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To analyze the effect of potassium (K) fertilizer types and application time on the yield and quality of oil sunflower, a field experiment was conducted in 2014-2016 using oil sunflower hybrid, longkui No. 3 in Jingtai. The experiment included two factor randomized block design with 6 treatments and 3 replications (Potassium chloride (F1) and potassium sulfate (F2); 100% basal application (T1), 50% base fertilizer+50% bud stage (T2), 25% base+50% bud stage+25% flowering period (T3)). The results showed that there was no significant difference between KCl and K2SO4 treatments in disc diameter, thousand kernel weight, crude fat, oil production and linolenic acid content. Compared with K2SO4, KCl increased the yield significantly in 2014. The F1T2 increased the yield by 4.96% compared with F2T2, and F1T3 increased the yield by 4.06% compared with F2T3. The Shelling percentage and oleic acid content increased significantly in 2015 and 2016, the Shelling percentage of F1T1 increased by 1.50% and 2.99% compared with F2T1 in 2015 and 2016, and that of F1T2 increased by 1.76% and 19.7%, respectively, compared with F2T2 in 2015 and 2016; the oleic acid content of F1T2 increased by 5.92% compared with F2T2 in 2015; and the oleic acid content of F1T3 increased by 9.09% compared with F2T3 in 2016. The crude protein content of F2T3 decreased significantly in 2014 and 2016; the crude protein content of F2T3 increased by 9.95% and 8.87%, respectively, compared with F1T3 in 2014 and 2016. The crude protein yield decreased significantly in 2016 and the crude protein production decreased significantly in 2016. The crude protein production of F2T3 increased by 9.29% compared with that of F1T3 in 2016. The linoleic acid content decreased significantly in 2015 and 2016, the linoleic acid content of F1T3 increased by 3.17% and 3.03%, respectively, compared with F2T3 in 2015 and 2016. There was no significant difference in disc diameter and linolenic acid content of oil sunflower among K application times, but there were significant differences in thousand kernel weight, shelling percentage, yield, protein content, protein yield, crude fat content, oil yield, oleic acid and linoleic acid. The best application time of potash fertilizer was base application. There was a significant positive correlations between yield and disc diameter, thousand kernel weight and kernel yield. There was a negative correlation between oleic acid and linoleic acid. |
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