| Variation characteristics and indexes of climatic suitability of spring maize in Inner Mongolia |
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| DOI：10.7606/j.issn.1000-7601.2021.03.26 |
| Key Words: spring maize climatic suitability evaluation index Inner Mongolia |
| Author Name | Affiliation | | YUE Kun | Ecological and Agricultural Meteorological Center of Inner Mongolia, Huhhot, Inner Mongolia 010051, China | | WU Rongsheng | Ecological and Agricultural Meteorological Center of Inner Mongolia, Huhhot, Inner Mongolia 010051, China | | SANG Jing | Ecological and Agricultural Meteorological Center of Inner Mongolia, Huhhot, Inner Mongolia 010051, China | | JIANG Shaojie | Ecological and Agricultural Meteorological Center of Inner Mongolia, Huhhot, Inner Mongolia 010051, China |
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| Abstract: |
| In order to quantify the index of climate suitability and to analyze the cause of the characteristic change of the spring maize in Inner Mongolia, we collected data of temperatures, rainfall, sunlight, and comprehensive weather factors of 1981 through 2018 in Inner Mongolia’s different ecotope in different spring maize growth periods. The results indicated that temperature suitability of maize was lower than 0.5, which was the main climatic factor restricting corn planting in the northeastern Inner Mongolia, whereas lacking of precipitation was the main cause in other areas in Inner Mongolia. In most recent 40 years, the temperature suitability increased at 0.05·10a-1, the increase in the temperature helped the overall development of the spring maize in middle and eastern areas. However, the precipitation showed a downward trending in the same area. Therefore, the critical factor for increasing and maintaining the yield of the spring maize was to utilize the agriculture water resources appropriately. The relatively low suitability in middle and western area was caused by lacking of rainfall during corn's growth period, and insufficient temperature at the maturity stage in the eastern region. The suitability index was formulated through the quintiles method, and the result of the regional indices were basically in consistent with the spring maize yield in the corresponding area. |
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