| Study on yield and yield components of summer maize under different groundwater levels |
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| DOI：10.7606/j.issn.1000-7601.2010.06.07 |
| Key Words: summer maize groundwater level supplementary water capacity leaf area index yield yield components |
| Author Name | Affiliation | | XIAO Junfu | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinrxiang, He'nan 453003, China | | NAN Jiqin | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinrxiang, He'nan 453003, China | | LIU Zhandong | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinrxiang, He'nan 453003, China | | YU Jianhe | Erfeng Irrigation Station, Tianchang, Anhui 239300，China |
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| Abstract: |
| According to the irrigation experiment data of summer maize under different groundwater levels in 2009 at
Erfeng Irrigation Station of Tianchang, a field experiment was conducted to evaluate the impact of different groundwater levels management on yield and yield components of summer maize . The groundwater level management consisted of six groundwater level control set and one free water level. The results showed that: supplementary water capacity, soil water content in growing periods and leaf area index of summer maize all decreased with the increase of groundwater depth;
plant height of summer maize was remarkably influenced by the groundwater level in the early tassel, but rarely at flower-ing stage. The tests results also showed that the water level depth had greater impact on yield when the groundwater level was larger than 60 cm at the early elongation stage or less than 40 cm at the late elongation stage, and it had impact on total ear particle numbers and 100-seed weight，causing serious yield reduction. |
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