灌水方式对不同脱硫石膏水平油葵产量及经济效益的影响

通过4种灌水方式、2个脱硫石膏水平和对照旱地油葵田间试验，探讨了灌水方式对不同脱硫石膏水平油葵产量及经济效益的影响。结果表明，不同处理下，油葵的生物产量（除花盘外）、经济产量及空秕率与对照组相比均达到极显著水平。T5处理下，油葵生物产量、经济产量均最高，分别为38 492.26、1 826.19 kg/hm2，约为对照的86.09%、89.39%，但节水率约40%。回归分析结果表明，油葵最佳灌水时期为现蕾期、花期及灌浆期，油葵的最佳灌水量、脱硫石膏水平分别为3 150 m3/hm2、30 t/hm2。经济分析结果表明，第1 年纯收入最高值出现在T2栽培模式下，达到839.88 元/hm2，约为对照的83.39%；但从长远角度来看，在无施用脱硫石膏和其他投入与产出不变的情况下，推测T5经济效益最高、为1 515.48 元/hm2，同比第1 年T2、对照分别增加了80.44%、50.47%。

Effect on irrigation method on yield and economic benefit ofoil sunflower under different desulphurization gypsum levels

A field experiment was conducted to evaluate the effect of irrigation method on yield and economic benefitof oil sunflower under desulphurization gypsum levels, which consisted of four irrigation methods, two desulfurizationgypsum levels and the contrast. The results showed that, compared with the contrast, the biological yield (except the floraldisc), economic yield and sterile grain rate of oil sunflower reached a significant level under different treatments. Biologicalyield 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 fillingstage, the best level of irrigation water and desulfurization gypsum were respectively 3 150 m3/hm2, 30 t/hm2. Economicanalysis results showed that the net income of oil sunflower was 839.88 yuan/hm2, about 83.39% of the contrast under T2cultivation mode in the first year, but from a long-term point of view, in the case of other inputs and outputs unchanged, itwas speculated that economic benefits of oil sunflower would be the highest -level with 1 515.48 yuan/hm2 withoutapplication of desulphurization gypsum, compared with T2 and the contrast, increased by 80.44% and 50.47%, respectively.