玉米间作花葵水分高效利用模式初探

针对西北绿洲灌区传统间作耗水量大、单方水效益不高等问题，通过大田试验，探讨不同覆盖方式和播量对玉米间作花葵复合群体的产值、玉米产量和水分生产效益的影响,以期为干旱区间作高效水分利用提供新思路。研究结果表明，玉米间作花葵可在不增加耗水量的情况下提高单位土地面积产值。花葵地膜覆盖方式显著提高花葵切花数但显著降低花葵商品率，地膜覆盖及播量对花葵水分生产效益(WPE)影响不显著。与单作玉米相比，玉米间作花葵可显著提高水分生产效益(WPE)，WPE达到12.34~13.28元/m，较玉米单作提高50.3%~61.8%。覆盖条件下花葵高播量间作玉米模式总经济效益最高达到83 337元/hm²。

High Efficient Water Use of Maize and Sunflower Intercropping

The traditional multi cropping systems in the oasis region of Northwest of China are facing the challenge of high water consumption and low water use efficiency(WUE), constructing high WUE intercropping pattern may be a preferable approach in arid region. Field experiments were conducted to investigate the influence of mulching method and seeding quantity on the production value of maize/sunflower intercropping, maize yield and water production efficiency (WPE) with. The results showed that maize/flower intercropping could increase unit area of land output value without increasing water consumption. Number and date of cut flowers increased by mulching methods, but sunflower commodity rate reduced. Compared with the monoculture of maize and sunflower, maize/sunflower intercropping significantly increased WPE. WPE of maize/sunflower intercropping reached 12.34-13.28 yuan/m, 50.3%-61.8% higher than monoculture of maize. The revenue of sunflower/maize intercropping with film mulching and high seeding quantity treatment could reach to 83 337 yuan/hm² in maximum.