| Water shortages restricted economic development. It was necessary to promotewater-saving agriculture. Development of high-efficiency agriculture was to improveagricultural water use efficiency and yield. Water-saving irrigation technology ofintercropping system needed to be studied further. This test was conducted in thedesert oasis area based on natural climatic conditions, established melon/sunflowerintercropping system. Two crops monoculture as a control, studied water useefficiency, light use efficiency, yield, quality, etc. of melon, sunflower on differentirrigation quota. Found the intercropping of melon and sunflower suitable irrigationsystem, improved water use efficiency of desert oasis farmland. In order to providescientific basis for water-saving efficiency and intercropping technology. The mainresults were as follows:(1) Irrigation water quota and frequency affected plant growth of sunflower andmelon. Irrigation frenquency of9times and irrigation water quota of450m3/hm2resulted in the best growth. The monoculture and intercropping had no significanteffect on sunflower plant height and stem diameter.(2) Light use efficiency of melon/sunflower intercropping system wassignificantly higher than monocultures. When the irrigation water quota andfrequency were the highest, the light use efficiency of intercropping was themaximum (1.25%). Compared with those of the monoculture, the average light useefficiency of the intercropping system was improved by59.41%and42.25%.(3) The total biomass of intercropping was significantly higher than those in themonocultures. When the irrigation frequency was9times and the irrigation waterquota was300m3/hm2, the maximum total biomass (15720kg/hm2) was achieved inintercropping. The average total biomass in the intercropping system was87.30%and92.78%higher than those in monocultured melon and sunflower.(4) The yields of melon in intercropping and monoculture were not obviouslydifferent, but intercropping system gave out significantly higher yield than that ofmonocultured sunflower. When the irrigation water quota and frequency were the highest, the yield of intercropping was the maximum (46650kg/hm2). The averageyield of the intercropping system was16.30%higher than monocultured melon andwas13times higher than monocultured sunflower.(5) No significant difference in flesh thickness and sugar content as found amongintercropping and monocultured melons, but moderately reduced irrigation waterquota and frequency could increase the fruit flesh and sugar content of the melon.(6) Water use efficiency of melon/sunflower intercropping system wassignificantly higher than those of the monocultures. When the irrigation frequencywas9times and irrigation water quota was225m3/hm2, the water use efficiency wasthe highest (4.61kg/m3). The average water use efficiency of the intercropping systemwas70.11%higher than that of the monocultured melon and1.56times higher thanthat of the monocultured sunflower.(7) The results indicated that the optimum irrigation quota of melon/sunflowerintercropping was: the irrigation frequency was7times and the irrigation water quotawas225m3/hm2. |
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