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| DOI：10.13522/j.cnki.ggps.2022666 |
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| Water Deficit Characteristics of Typical Crops and Responses to Key Driving Factors in Northern of Yinshan Mountain, Inner Mongolia |
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TANG Pengcheng, XU Bing, ZHANG Xiaomin, TIAN Delong,
WANG Guoshuai, ZHANG Chen, REN Jie, LI Zekun
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1. Institute of Water Resources for Pastoral Area Ministry of Water Resources, Hohhot 010020, China;
2. Yinshanbeilu Grassland Eco-hydrology National Observation and Research Station,
China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
3. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
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| Abstract: |
| Based on the daily meteorological data of Wuchuan County in northern of Yinshan Mountain in Inner Mongolia from 1990 to 2019, the water demand, water deficit characteristics and their relationships of rain fed potato and spring wheat in different hydrological years were studied. The results showed that the average water demand of potato and spring wheat in the whole growth period was 338.4 mm and 403.6 mm; The water demand of potato was the largest in the flowering harvest period, accounting for 52.8% of the total water demand in the whole growth period. The water demand of spring wheat in tillering flowering stage and flowering maturity stage is relatively large, accounting for 52.6% and 31.8% of the water demand in the whole growth period respectively. The water deficit during the whole growth period of rain fed potato in normal year and dry year is 26~157 mm and 148~173 mm respectively, and there is no water shortage during the growth period of rain fed potato in wet water year. The water deficit in the whole growth period of rain fed spring wheat in wet year, normal year and dry year is 54~90 mm, 122~267 mm and 240~285 mm respectively. The water deficit of potato in inflorescence formation flowering stage and flowering harvest stage is relatively large, and it can basically meet the water demand of potato in other growth stages.The water deficit of spring wheat is the most serious in the tillering flowering stage, and the average water deficit is about 134 mm. The precipitation in other growth stages can basically meet the water demand for normal growth of spring wheat. In order to reduce the yield loss, it is necessary to implement rain enrichment and supplementary irrigation according to water deficit in the middle and late growth stages of spring wheat and potato. |
| Key words: Northern of Yinshan Mountain; water demand; precipitation; water shortage; crop yield |
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