| A field experiment was conducted to evaluate the effect of irrigation method on yield and economic benefit
of oil sunflower under desulphurization gypsum levels, which consisted of four irrigation methods, two desulfurization
gypsum levels and the contrast. The results showed that, compared with the contrast, the biological yield (except the floral
disc), economic yield and sterile grain rate of oil sunflower reached a significant level under different treatments. Biological
yield and economic yield of oil sunflower were respectively 38 492.26, 1 826.19 kg/hm2, which were the highest-level,
accouting for about 86.09%, 89.39% of the contrast under T5 treatment, but the saving water rate was about 40% .
Regression analysis results showed that the best irrigation periods of oil sunflower were squared, flowering and grain filling
stage, the best level of irrigation water and desulfurization gypsum were respectively 3 150 m3/hm2, 30 t/hm2. Economic
analysis results showed that the net income of oil sunflower was 839.88 yuan/hm2, about 83.39% of the contrast under T2
cultivation mode in the first year, but from a long-term point of view, in the case of other inputs and outputs unchanged, it
was speculated that economic benefits of oil sunflower would be the highest -level with 1 515.48 yuan/hm2 without
application of desulphurization gypsum, compared with T2 and the contrast, increased by 80.44% and 50.47%, respectively. |
