Abstract:

In order to evaluate effects of climate change on the suitable sowing time of winter wheat in Zhengzhou City, the data of temperature and growth development of wheat were analyzed. The results indicated that: accumulated temperature from October to December were on the rise, and it had significant positive correlation between accumulated temperature and growth of wheat, correlation coefficient were 0.720 and 0.495; meanwhile the last day of suitable temperature for wheat sowing showed to postpone, for the last day of 17℃, 5 days and 6 days to postpone during 2001-2010 compared with 1981-1990 and 1991-2000, respectively. For the last day of 15℃ 5 days and 4 days to postpone during 2001-2010 compared with 1981-1990 and 1991-2000, respectively. So it was considered that, the suitable sowing time of winter wheat was during October 11 to 31.