| The water demand and optimal irrigation schedule of maize in drought years at eastern area of Inner Mongolia |
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| DOI：10.7606/j.issn.1000-7601.2018.01.17 |
| Key Words: eastern Inner Mongolia drought years maize water demand regulation efficiency of water application optimal irrigation schedule |
| Author Name | Affiliation | | WANG Ying-hui | Tongliao Academy of Water Planning and Design, Tongliao, Inner Mongolia 028000, China | | TANG Peng-cheng | Hydraulic Research Institute of Ministry of Water Resources Pastoral, Hohhot, Inner Mongolia 010018, China | | LI Shu-guang | Tongliao Water Technology Promotion Stations, Tongliao, Inner Mongolia 028000, China | | TIAN Yu-chun | Horqin District Toyota Irrigation Experimental Station, Tongliao, Inner Mongolia 028000, China | | LI Jia-qi | Tongliao Water Technology Promotion Stations, Tongliao, Inner Mongolia 028000, China |
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| Abstract: |
| In order to highly utilize the limited water resources of eastern Inner Mongolia in drought years, a three-year (2009—2011) test was carried out in Tongliao city Korqin district to analyze the law of water requirement of maize in drought years. The results showed that the water consumption was high at elongation stage and tasseling stage and low in seedling stage and postulation stage. Furthermore, the water consumption of elongation stage and tasseling stage accounts for more than half of that during the whole growth period of maize. The water consumption intensity was diminishing in the order of tasseling, elongation, postulation and seedling. A reduction in yield was caused by different water stress for each growth period of maize in a certain range. The yield reduction by low irrigation at tasseling stage was the most serious. Water productivity and yield was not corresponding to the requirement of water consumption. The productivity of water resources could be enhanced by the effective water stress. At the same time, the insufficient irrigation in drought years under different irrigation quota of corn is emphasized by this study. |
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