关键词: 福寿螺, 福寿螺, 生物入侵, 密度, 调查

Abstract:

In order to explore the law of the period of winter wheat in Weifang adaptation to climate change, based on the growth period observation data of winter wheat and accumulated temperature, sunshine hours, precipitation data in every growth period during 1980-2010 in Weifang, the response of the growth period of winter wheat to climate change was statistically analyzed by using linear regression and path analysis methods. The results showed that: the accumulated temperature and precipitation throughout the growth period of winter wheat in Weifang all showed decreasing trends, and the sunshine hours significantly reduced by 7.58 h/a. The growth period length of winter wheat significantly shortened by 0.43 d/a. The sowing date delayed. The seedling and maturity stage length shortened. The over-wintering stage, jointing and earring stage and filling stage length prolonged. Before jointing, sunshine hours played the most important role in the growth period length. And after jointing, accumulated temperature played the most important role in the growth period length.