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| DOI： |
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| Effects of Ditch Planting on Growth of Water Spinach (Ipomoea aquatic Forsk) in Closed Greenhouse |
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ZHANG Min, FAN Qiang, DANG Yaai, ZHANG Fucang, XUE Xuzhang, WANG Guodong
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College of Science, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering，Northwest A&F University, Yangling 712100, China; .Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
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| Abstract: |
| The temperature of the ditch cultivation was relatively stable and less seasonally changeable, so it was applied to create suitable temperature condition in closed greenhouse for crop growth. This paper compared the difference of environmental factor under different ditch depth, and analyzed the influence of growth, yield, and water productivity in water spinach. The results indicated that the temperature and illumination decreased with the increase of ditch depth. There were similar rules with light-reflecting film while the temperature and illumination were higher than those at the same ditch without light-reflecting film. The humidity remained between 25%～60% which was suitable for the plant growth. The plant height and stem diameter of none reflecting film were better than those with reflecting film. The yields of without light-reflecting film at different ditch depth were 0.5 m treatment > 0.7 m treatment > 0.25 m treatment >0.9 m treatment, and was larger than the other treatments. Water consumption decreased with the increase of ditch depth. The water consumption and productivity increased with the increase of ditch depth and were fewer than those the none light-reflecting film at the same ditch depth. Therefore, the ditch cultivation is not only applicable for solving the problem of high temperature in summer in closed greenhouse, but also could improve the water productivity greatly. |
| Key words: planting with ditch; closed greenhouse; cooling; water productivity; water spinach |
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