| Study on meteorological conditions and prediction models of sowing date for spring wheat and rape in Qinghai Province |
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| DOI：10.7606/j.issn.1000-7601.2022.06.25 |
| Key Words: spring wheat rape meteorological elements model construction Qinghai Province |
| Author Name | Affiliation | | SHEN Yanling | Qinghai Academy of Meteorological Sciences, Xining, Qinghai 810001, China
Key Laboratory for Disaster Prevention and Mitigation in Qinghai, Xining, Qinghai 810001, China | | ZHAO Mengfan | Qinghai Academy of Meteorological Sciences, Xining, Qinghai 810001, China
Key Laboratory for Disaster Prevention and Mitigation in Qinghai, Xining, Qinghai 810001, China | | ZHAO Tong | Qinghai Academy of Meteorological Sciences, Xining, Qinghai 810001, China
Key Laboratory for Disaster Prevention and Mitigation in Qinghai, Xining, Qinghai 810001, China | | SHEN Xiaoyan | Qinghai Academy of Meteorological Sciences, Xining, Qinghai 810001, China
Key Laboratory for Disaster Prevention and Mitigation in Qinghai, Xining, Qinghai 810001, China |
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| Abstract: |
| Based on the meteorological data of spring wheat and rape observation stations in the eastern agricultural area of Qinghai Province from 1961 to 2019, meteorological elements were analyzed through the statistical methods. The results showed that in the meteorological conditions related to the crop planting period, the temperature and the average ground temperature increased obviously at a rate of 0.4 ℃·10a-1 and 0.44 ℃·10a-1, and the relative humidity decreased slowly after 2004 (-0.57%·10a-1). Among the meteorological elements related to the sowing period, the ground temperature and air temperature were the important elements. The temperature at which the temperature stably increasing above 0℃, 3℃, 6℃ and the ground temperature stably increasing above 0℃, 6℃, 10℃ was affected by altitude in spatial distribution. In general, it had the distribution characteristics of “southeast early and northwest late”. The crops in various regions stably increased above 0℃ and 3℃, and the ground temperature stably increased above 0℃. The trend of early day advance was more obvious. According to the stable temperature, the temperature stably increased above 0℃, 3℃, the ground temperature passed steadily. The model established based on the first day of temperature and ground temperature had a good verification result, which can provide a scientific basis for agricultural meteorological services. |
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