Last year, in most parts of Shandong, especially in the Zibo region, winter wheat emerged large-scale prosperous periods before winter, laying a hidden danger for winter wheat safe winter. Fortunately, long periods of relatively strong cold weather did not occur in winter, so that there was no large area of ​​winter wheat frost damage.
In the past decade, with the global warming, the climate zone in the northern hemisphere has moved northward. Shandong Province has been affected by this, and the temperature of winter wheat has gradually increased. Under such a large climate background, how to minimize the possibility of winter wheat suffering from freezing injury? The pre-winter winter wheat growth is the key factor. The main factor affecting winter wheat growth before winter is the accumulated temperature before winter, and the accumulated temperature before winter is directly influenced by the sowing time of winter wheat. To this end, the Huantai County Meteorological Bureau, based on the three major temperature indicators required for the entire process of winter wheat growth and development, has conducted statistics on the temperature data of relevant areas in northwestern Shandong in the past 10 years. After rigorous calculations, it has been found that in the past 10 years, The optimal sowing time for winter wheat in Taixian County and surrounding areas was obviously pushed back than before. For example, this year, the best reference time for winter wheat is between October 2 and October 10, and the winter wheat planted before September 29 will prosper before winter, which is not conducive to winter winter wheat safely. Therefore, it is suggested that according to the geographic location of the respective regions in the northwestern plains of Shandong, with reference to this conclusion, the timing of wheat sowing should be appropriately adjusted. The northern part of northwestern Shandong should be slightly earlier than the south.
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