绿洲灌区典型间作模式的产量和光能利用效率

为寻求河西绿洲灌区低耗水、高光效、高产多熟种植模式,在限量灌水条件下,通过大田试验对该区主要种植模式的产量和光能利用率进行了量化分析.结果表明:4种间作模式土地当量比均大于1,排序为玉米/豌豆>玉米/油菜>小麦/玉米>小麦/大豆;在同等可比面积上,小麦、玉米、豌豆和油菜在间作模式下均较单作表现出显著增产效应,但在不同模式下增产效应不同,小麦在小麦/玉米和小麦/大豆2种间作模式下产量分别提高49.14%、51.50%,玉米在玉米/油菜、玉米/豌豆和小麦/玉米3种间作模式中产量分别提高20.88%、53.48%、70.34%.各间作模式下的光能利用率为玉米/豌豆>玉米/油菜>玉米/小麦>小麦/大豆.玉米/豌豆间作模式可作为目前河西绿洲灌区低耗水、高光效型种植模式之一.

The yield and light use efficiency of different intercropping systems in the Hexi oasis irrigation area

To determine the most efficient planting patterns and use the least amount of water in the Hexi oasis irrigation area of Gansu Province,a field experiment was conducted to quantitatively analyze the yield and efficiency of different intercropping schemes.The results showed that land equivalent ratio(LER) of four intercropping,corn/peas,corn/rape,corn/wheat and wheat/soybeans,were all higher than 1.And the four intercropping could significantly improve yields when compared with monocultures of each of the same crops in the same area.The yields of different combinations of the same crops were also different.Intercropping corn/wheat and wheat/soybean increased yields by 49.14% and 51.50%,respectively,while the yield of intercropping corn/rape,corn/pea and corn/wheat increased by 20.88%,53.48% and 70.34%,respectively,indicating that intercropping was an efficient means of increasing yields in the Hexi oasis irrigation area.