Water consumption characteristics of potato under different precipitation years in Bashang area in Hebei province
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DOI:10.7606/j.issn.1000-7601.2019.04.33
Key Words: potato  yield  evapotranspiration  water use efficiency  Bashang area  precipitation year types
Author NameAffiliation
TANG Jian-zhao Center of Geographic Information Development, Application and Engineering Technology Research of Hebei, Institute of Geographical Sciences, Hebei Academy of Sciences, Shijiazhuang, Hebei 050011, China 
XIAO Deng-pan Center of Geographic Information Development, Application and Engineering Technology Research of Hebei, Institute of Geographical Sciences, Hebei Academy of Sciences, Shijiazhuang, Hebei 050011, China 
GUO Xin-ze Zhangbei Meteorological Bureau, Zhangbei, Hebei 076450, China 
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Abstract:
      The water consumption characteristics of potato under different precipitation years was analyzed based on the experiment data, soil water data, and climate data during the potato growing periods from 2010 to 2017. Results showed that total precipitation during potato growing period ranged from 260 to 449 mm, and 25% of the experimental years were dry years. The amount of water consumption of potato ranged from 25 to 182 mm during different growing periods, the water consumption was maximum for the period of planting-emergency and tuberization-tuber bulking under wet years compared with other years. Water consumption during the period of emergency-tuberization was more under dry years compared with other year types. The water consumption of potato during the period of tuber bulking to maturity was more under normal years compared with dry years and wet years. Enhance the water consumption of potato during the period of tuber bulking to maturity had positive effects on potato yield. The daily water consumption of potato was highest during the period of tuberization-tuber bulking compared with other stages under all year types and the values of which were 3.6, 3.9 mm, and 4.7 mm, respectively under dry, normal, and wet years. Potato yields generally increased from 8,250 to 24,500 kg·hm-2. Water use efficiency (WUE) of potato generally increased from 32 to 135 kg·hm-2·mm-1 under experimental years and the WUE was the highest under dry years. Enhancing the irrigation amount during the period of tuber bulking to maturity and medium drought exercise made under other growing periods had significance impacts on increasing potato yield in Bashang area.
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