| Effects of subsurface drip irrigation on water consumption, yield and water productivity of alfalfa |
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| DOI：10.7606/j.issn.1000-7601.2017.05.38 |
| Key Words: subsurface drip irrigation alfalfa water consumption water productivity irrigation system |
| Author Name | Affiliation | | CAO Xue-song | Institute of Water Resources Science of Pasturing Area of the Ministry of Water Resources, Huhhot, Inner Mongolia 010020, China | | LI He-ping | Institute of Water Resources Science of Pasturing Area of the Ministry of Water Resources, Huhhot, Inner Mongolia 010020, China | | ZHENG He-xiang | Institute of Water Resources Science of Pasturing Area of the Ministry of Water Resources, Huhhot, Inner Mongolia 010020, China | | FENG Ya-yang | Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010018, China | | ZHANG Song | Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010018, China |
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| Abstract: |
| In order to explore the best irrigation volume and buried depth of drip irrigation tape of alfalfa using subsurface drip irrigation, in this paper, a field experiment was conducted to investigate the effects of irrigation amount, buried depth of drip irrigation tape on alfalfa water consumption, yield and water productivity using subsurface drip irrigation. Three irrigation amount (volumes) (15.0 mm, 22.5 mm, 30.0 mm) and three buried depth of drip irrigation tape (10 cm, 20 cm, 30 cm) were considered in this experiment. The results showed that alfalfa water consumption, yield and water productivity using buried drip irrigation increased significantly (P<0.01) with the increase of irrigation amount, but first increased significantly (P<0.01) and then decreased (P<0.05) with the increase of the drip irrigation depth. Furthermore, during the whole growing period of alfalfa, the total water consumption was 400 to 500 mm, total yield (output) was 7 500 to 12 000 kg·hm-2, and water productivity was 1.80 to 2.50 kg·m-3. Hence an irrigation quota (amount) of 22.5 to 30.0 mm, irrigation cycle of 5 to 7 days using buried drip irrigation of alfalfa with the depth of 20 cm was recommended for subsurface drip irrigation of alfalfa. |
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