Research on the up limitation of irrigation for cucumber during fruit-set period

In order to explore the suitable up limitation of irrigation for cucumber during fruit-set period for autumn delay planting in greenhouse,has researched the cucumber growth,photosynthesis,water use efficiency and yield change under different up limitation of soil moisture at 80%, 85%, 90%, 85% and 100% of field capacity and analyzed the impact of different up limitation of soil moisture to the irrigation times and irrigation volume for the cucumber during fruitset period.The test material was`jinchun No.3' cucumber.The results showed that when the up limitation of soil moisture was at 90% of field capacity, the plant was vigorous growing, root system was strong activity,obtained maximum of photosynthesis and water use efficiency, the gross yield was significantly higher than other treatments, and yield was increased 18.4% compared with 100% treatment, the water-saving effect was good.So the suitable up limitation for irrigation was 90% of field capacity.