| Effects of regulated deficit irrigation on water use efficiency, yield and quality of watermelon in Minqin county of Gansu province |
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| DOI：10.7606/j.issn.1000-7601.2007.04.24 |
| Key Words: regulated deficit irrigation watermelon quality water use efficiency |
| Author Name | Affiliation | | WANG Feng | Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100 | | KANG Shao-zhong | Research Center for China Water Issues, China Agricultural University, Beijing 100083, China | | WANG Zhen-chang | Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100 |
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| Abstract: |
| The regulated deficit irrigation experiment of watermelon conducted in Minqin county of Gansu province in 2005 and 2006 concluded that：water deficit both reduces the soil water content and the rate of evapotranspiration and thus reduces the rate of water resume in the soil. Water deficit in the growing period of flowering can reduce the transpiration rate, photosynthesis rate and water use efficiency of the single leaf and thus resulted in the reduction of watermelon's yield .Slight water deficit in the growing period of fruit growth could be compensated by the following growing period and result in a higher yield than the full irrigation. The treatments of water deficit in different growing period could improve more or less the content of Vc and the content of soluble solid than the full irrigation treatment, the treatment which conducted water deficit in the growing period of fruit growth could improve the content of Vc and soluble solid significantly. Above all we could conclude that fruit growth period is the optimal period to conduct regulated deficit irrigation to watermelon grown in Minqin county, Gansu province. |
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