Effect of water-nitrogen coupling on growth and yield of edible sunflower

Abstract

In order to reveal the effect of water and nitrogen coupling on the growth and yield of edible sunflower in Hexi area, based on the field experiment, using edible sunflower “JK601” as the test material, the split-area experimental design was adopted, and a two-factor two-factor fully-treated plot experiment of water and nitrogen was carried out under drip irrigation conditions. The results showed that water-nitrogen coupling had a significant effect on plant height of edible sunflower. the highest plant height was obtained in T2 and T7 treatments (249.87 cm and 249.03 cm), and the highest yield was obtained in T7 treatment (5304.33 kg/m2 ), which was significantly higher than that of T17 treatment (18.91%). The yields of moderate irrigation and fertilization (W1 and N1) were better than those of high water and high N treatments, indicating that moderate fertilization can significantly increase yields under moderate irrigation conditions in Hexi region.